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Sample records for antiform ossa morena

  1. El granito Precambrico deValsequillo (zona de Ossa-Morena, Macizo Iberico, España)

    OpenAIRE

    Bandrés, A.; Eguiluz, Luis; Apraiz, A.

    1999-01-01

    The Valsequillo granite is situated in the Peraleda de Zaucejo antiform (Obejo-Valsequillo-Puebla de la Reina Domain) at the northern Ossa-Morena Zone. This antiform is defined by Armorican Quartzite and Devonian rocks. Beneath this rocks there are arkosic conglomerates from Tremadoc. Tremadoc rocks are discordant, over Malcocinado poligenics conglomerates. Malcocinado conglomerates containt decimetric pebbes of Valsequillo granite and dioritoids. The Valsequillo granite is a subvolcanic igne...

  2. The Odivelas Limestone: evidence for a Middle Devonian reef system in western Ossa-Morena Zone (Portugal)

    Czech Academy of Sciences Publication Activity Database

    Machado, G.; Hladil, Jindřich; Koptíková, Leona; Fonseca, P. E.; Rocha, F. T.; Galle, Arnošt

    2009-01-01

    Roč. 60, č. 2 (2009), s. 121-137 ISSN 1335-0552 R&D Projects: GA AV ČR IAA300130702 Institutional research plan: CEZ:AV0Z30130516 Keywords : Ossa Morena Zone * Middle Devonian * petrology * biostratigraphy * magnetic susceptibility * Eifelian/Givetian * Paleozoic orogens * Beja Igneous Complex * reef fauna * carbonate petrology Subject RIV: DB - Geology ; Mineralogy Impact factor: 0.963, year: 2009

  3. The Galicia-Ossa-Morena Zone: Proposal for a new zone of the Iberian Massif. Variscan implications

    Science.gov (United States)

    Arenas, Ricardo; Díez Fernández, Rubén; Rubio Pascual, Francisco J.; Sánchez Martínez, Sonia; Martín Parra, Luis Miguel; Matas, Jerónimo; González del Tánago, José; Jiménez-Díaz, Alberto; Fuenlabrada, Jose M.; Andonaegui, Pilar; Garcia-Casco, Antonio

    2016-06-01

    Correlation of a group of allochthonous terranes (referred to as basal, ophiolitic and upper units) exposed in the NW and SW of the Iberian Massif, is used to propose a new geotectonic zone in the southern branch of the Variscan Orogen: the Galicia-Ossa-Morena Zone. Recent advances in SW Iberia identify most of the former Ossa-Morena Zone as another allochthonous complex of the Iberian Massif, the Ossa-Morena Complex, equivalent to the Cabo Ortegal, Órdenes, Malpica-Tui, Bragança and Morais complexes described in NW Iberia. The new geotectonic zone and its counterparts along the rest of the Variscan Orogen constitute an Internal Variscan Zone with ophiolites and units affected by high-P metamorphism. The Galicia-Ossa-Morena Zone includes a Variscan suture and pieces of continental crust bearing the imprint of Ediacaran-Cambrian events related to the activity of peri-Gondwanan magmatic arcs (Cadomian orogenesis). In the Iberian Massif, the general structure of this geotectonic zone represents a duplication of the Gondwanan platform, the outboard sections being juxtaposed on top of domains located closer to the mainland before amalgamation. This interpretation offers an explanation that overcomes some issues regarding the differences between the stratigraphic and paleontological record of the central and southern sections of the Iberian Massif. Also, equivalent structural relationships between other major geotectonic domains of the rest of the Variscan Orogen are consistent with our interpretation and allow suspecting similar configurations along strike of the orogen. A number of issues may be put forward in this respect that potentially open new lines of thinking about the architecture of the Variscan Orogen.

  4. Cadomian vs. Variscan evolution of the Ossa-Morena zone (SW Iberia): field and 40Ar/ 39Ar mineral age constraints

    Science.gov (United States)

    Dallmeyer, R. D.; Quesada, C.

    1992-12-01

    Six hornblende and ten muscovite concentrates have been dated from three contrasting tectonic units exposed within the Ossa-Morena zone of the Iberian Massif. These include: (1) the Obejo-Valsequillo domain (north of the Badajoz-Córdoba shear zone); (2) the Sierra Albarrana structural unit (immediately south of the Badajoz-Córdoba shear zone); and (3) the thermal some exposed within the Olivenza-Monesterio antiform (Zafra-Monesterio domain). Hornblende from foliated amphibolite in the Obejo-Valsequillo domain (Siera Negra unit) displays internally discordant 40Ar/ 39Ar age spectra as a result of both intracrystalline contamination with extraneous argon and slight rejuvenation. 36Ar/ 40Ar vs. 39Ar/ 40Ar isotope-correlations are generally well-defined and yield ages of c. 550-560 Ma. These are interpreted to date cooling following late Precambrian-early Paleozoic (Cadomian) tectonothermal activity. This was followed by slight Variscan rejuvenation at c. 375-400 Ma. Muscovite from this unit displays internally discordant age spectra which reflect more extensive Variscan rejuvenation of intracrystalline argon systems which had initially cooled below appropriate blocking temperatures at c. 560 Ma. Hornblende and muscovite from the Sierra Albarrana domain (Sierra Albarrana Group) record 40Ar/ 39Ar plateau and isotope-correlation ages which range between c. 392 Ma and 351 Ma. These results indicate that complete Variscan rejuvenation was followed by relatively rapid post-metamorphic cooling. Hornblende separated from various lithologie elements exposed in the Olivenza-Monesterio Antiform yield variable results. Hornblende within a mafic xenolith in the Monesterio Granodiorite records an isotope-correlation age of c. 553 Ma which is interpreted to date the last cooling through appropriate argon retention temperatures. Hornblende within amphibolite of the Montemolin Series (lower Serie Negra) records internally discordant age spectra which reflect extensive Variscan (c

  5. Dating and differentiation of geological units in highly deformed and metamorphosed rocks - Can palynology help? Examples from the Ossa-Morena Zone (W Portugal)

    Czech Academy of Sciences Publication Activity Database

    Machado, G.; Vavrdová, Milada; Fonseca, P. E.; Chaminé, H. I.; Rocha, F. T.

    2010-01-01

    Roč. 30, - (2010), s. 23-27 ISSN 0474-9588 Institutional research plan: CEZ:AV0Z30130516 Keywords : palynomorphs * metasediments * Ossa-Morena Zone * organic matter preservation * deformation * mineralization Subject RIV: DB - Geology ; Mineralogy http://www.geol.uniovi.es/TDG/Volumen30/TG30-03.PDF

  6. Overview of the stratigraphy and initial quantitative biogeographical results from the Devonian of the Albergaria-a-Velha Unit (Ossa-Morena Zone, W. Portugal)

    Czech Academy of Sciences Publication Activity Database

    Machado, G.; Vavrdová, Milada; Fonseca, P. E.; Chaminé, H.; Tavares Rocha, F.

    2008-01-01

    Roč. 64, 2-4 (2008), s. 109-113 ISSN 0036-5343 Institutional research plan: CEZ:AV0Z30130516 Keywords : Gondwana * Laurussia * Devonian * Ossa Morena Subject RIV: DB - Geology ; Mineralogy http://www.nm.cz/publikace/archiv-en.php?id=4&rok=64&kcislu=2-4&f_=Show

  7. An Emsian-Eifelian Calciturbidite sequence and the possible correlatable pattern of the Basal Choteč event in Western Ossa-Morena Zone, Portugal (Odivelas Limestone)

    Czech Academy of Sciences Publication Activity Database

    Machado, G.; Hladil, Jindřich; Slavík, Ladislav; Koptíková, Leona; Moreira, N.; Fonseca, M.; Fonseca, P.

    2010-01-01

    Roč. 13, č. 4 (2010), s. 431-446 ISSN 1374-8505 R&D Projects: GA ČR GA205/08/0767; GA AV ČR IAAX00130702; GA AV ČR KJB307020602 Grant - others:Fundacao para a Ciencia e a Tecnologia (PT) SFRH/BD/23787/2005 Institutional research plan: CEZ:AV0Z30130516 Keywords : stratigraphy * sedimentology * magnetic susceptibility * Emsian-Eifelian boundary * Basal Choteč Event * Odivelas Limestone * SW Ossa-Morena Zone Subject RIV: DB - Geology ; Mineralogy Impact factor: 0.645, year: 2010 http://popups.ulg.ac.be/Geol/docannexe.php?id=3133

  8. Geochemistry and metamorphism of the Mouriscas Complex, Ossa-Morena/Central Iberian zone boundary, Iberian Massif, Central Portugal: Implications for the Cadomian and Variscan orogenies

    Science.gov (United States)

    Henriques, S. B. A.; Neiva, A. M. R.; Tajčmanová, L.; Dunning, G. R.

    2018-01-01

    The Mouriscas Complex is a deformed and metamorphosed predominantly mafic igneous complex of Ediacaran and Ordovician age and crops out at the Ossa-Morena/Central Iberian zone boundary in the Iberian Massif, Central Portugal. It comprises amphibolite with Neoproterozoic protoliths (ca. 544 Ma), protomylonitic felsic dykes derived from younger trondhjemitic protoliths (ca. 483 Ma) and garnet amphibolite derived of even younger dioritic protoliths (ca. 477 Ma). The protoliths of the Neoproterozoic amphibolites are calc-alkaline magmas of basic to intermediate compositions with intraplate and active continental margin affinities and are considered to represent the final phase of the Cadomian arc magmatism. They are interpreted to have originated as coarse-grained intrusions, likely gabbro or diorite and generated from the partial melting of meta-igneous lower crust and mantle. Their emplacement occurred near the Cadomian metamorphic event dated at ca. 540 Ma (P = 7-8 kbar and T = 640-660 °C) which is interpreted to represent a continental collision. During the Late Cambrian-Early Ordovician an extensional episode occurred in the central-southern Iberian Massif and was also observed in other areas of the Variscan Orogen. It led to mantle upwelling and to the development of an aborted intracratonic rift located at the Ossa-Morena/Central Iberian zone boundary and to the opening of the Rheic Ocean to the south of the area studied in present coordinates (i.e., between the Ossa-Morena and South Portuguese Zones). This event has been dated at ca. 477 Ma and was responsible for the melting of deep ancient mafic crust and mantle with formation of bimodal magmatism in an intra-plate setting, as indicated by the protoliths of the protomylonitic felsic dykes with trondhjemitic composition and of the garnet amphibolite. Subsequent Variscan metamorphism took place under amphibolite facies conditions (P = 4-5.5 kbar; T = 600-625 °C) at lower P-T conditions than the Cadomian

  9. Diachronism in the late Neoproterozoic-Cambrian arc-rift transition of North Gondwana: A comparison of Morocco and the Iberian Ossa-Morena Zone

    Science.gov (United States)

    Álvaro, J. Javier; Bellido, Félix; Gasquet, Dominique; Pereira, M. Francisco; Quesada, Cecilio; Sánchez-García, Teresa

    2014-10-01

    In the northwestern border of the West African craton (North Gondwana), a transition from late Neoproterozoic subduction/collision to Cambrian rift processes was recorded in the Anti-Atlas (Morocco) and in the Ossa-Morena Zone (Iberia). Cambrian rifting affected both Pan-African and Cadomian basements in a stepwise and diachronous way. Subsequently, both areas evolved into a syn-rift margin episodically punctuated by uplift and tilting that precluded Furongian sedimentation. A comparison of sedimentary, volcanic and geodynamic evolution is made in the late Neoproterozoic (Pan-African and Cadomian) belts and Cambrian rifts trying to solve the apparent diachronous (SW-NE-trending) propagation of an early Palaeozoic rifting regime that finally led to the opening of the Rheic Ocean.

  10. Orogenic potassic mafic magmatism, a product of alkaline-peraluminous mixing ? Variscan 'calc-alkaline' rocks from the Central Iberian and Ossa Morena Zones, Central Spain.

    Science.gov (United States)

    Scarrow, Jane H.; Cambeses, Aitor; Bea, Fernando; Montero, Pilar; Molina, José F.; Moreno, Juan Antonio

    2013-04-01

    Orogenic magmatic rocks provide information about mantle and crust melt-generation and -interaction processes. In this context, minor potassic mafic stocks which are formed of enriched mantle and crustal components and are common as late-orogenic intrusions in granitic plutons give insight into the timing of new crust formation and crustal recycling. Potassic mafic stocks are prevalent, albeit low volume, constituents of granite batholiths all through the European Variscan (350-280 Ma). In the Central Iberia Zone, Spanish Central System, crustal-melt, S-type, granitoid plutons are intruded by minor concomitant ultramafic-intermediate appinitic-vaugneritic stocks. Notwithstanding their whole-rock calc-alkaline composition, the stocks apparently did not have a subduction-related origin. Recent studies have attributed their genesis to mixing of alkaline mantle and peraluminous crustal melts. Their primary alkaline character, as indicated by amphibole and biotite mineral chemistry data, points, rather, towards an extension-related genesis. In the Ossa Morena Zone, south of the Central Iberian Zone, the igneous rocks also have a whole-rock calc-alkaline composition which has been considered to be the result of northward subduction of the South Portuguese Zone. Nevertheless, identification of a 'sill' of significant volume of mafic magma in the middle crust, the ´IBERSEIS reflective body', in a seismic profile across the Ossa Morena and South Portuguese Zones has cast doubt upon the calc-alkaline magmatism-subduction model; leading, instead, to the magmatism being attributed to intra-orogenic extension related to a mantle plume active from 340 Ma to 330 Ma. The aim here, then, is to reinvestigate the petrogenesis and age of the calc-alkaline rocks of the Ossa Morena Zone to determine their tectonomagmatic context be it subduction-, plume- or extension-related, and establish what they may reveal about mantle-crust interactions. Focussing, initially, on the Valencia del

  11. Implicaciones de la zona Ossa-Morena y dominios equivalentes en el modelo geodinámico de la Cadena Hercinica europea

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    Castro, A.

    1987-08-01

    Full Text Available The Ossa-Morena zone (OMZ has some peculiar features clearly different from those of the other inner domains in the Iberic Hercynian chain. It is a continental domain (microcontinent ? attached, from Lower Paleozoic times, to the continental crust of the Central Iberian zone (CIZ. During the Hercynian collision (Upper Paleozoic the OMZ behaved in a way different form that of adjacent areas (CIZ due to the peculiar features (Iess thicknees and pre-Hercynian evolution (Ordovician rifting. The OMZ, and their equivalent domains in the Iberian peninsula as well as in European chain, can have strong implications on the evolution of the Hercynian orogene. Part of the OMZ crust (and equivalent domains, together with the oceanic crust developed within it during the Ordovician rifting, was obduced over the inner domains (CIZ in areas of frontal collision (e.g. NW Iberian peninsula and French Massif Central and strongly stretched in areas of oblique collision (e.g. OMZ of SW Iberian peninsula and North Armorican domains.La zona Ossa-Morena (ZOM del hercínico peninsular posee unas características peculiares que la diferencian netamente de los otros dominios internos de la Cadena. Se trata de un dominio cortical (microcontinente ? adosado a la corteza de la Zona Centro-Ibérica (ZCI desde el Paleozoico Inferior. Durante la colisión continental hercínica (Palezoico Superior la ZOM responde de diferente forma que las zonas adyacentes (ZCI debido a su diferente constitución (menor espesor y peculiar evolución prehercínica (rifting ordovícico. Esta zona y sus equivalentes en otros dominios del hercínico peninsular y europeo, tienen fuertes implicaciones en el desarrollo del orógeno hercínico. Parte de la corteza continental de la ZOM fue, junto con la corteza oceánica desarrollada localmente en su interior durante el rifting ordovícido, obducida sobre los dominios internos (ZCI en zonas de colisión frontal (e.g. NW peninsular y Macizo C

  12. Caracterización geoquímica y estudio comparativo de plagiogranitos de las Zonas Surportuguesa y Ossa-Morena (SO del Macizo Ibérico, España

    Directory of Open Access Journals (Sweden)

    Bellido, F.

    2010-06-01

    Full Text Available Plagiogranites and albitic rocks belonging to contrasted magmatic associations of different ages and geodynamic environments outcrop in Ossa-Morena (OMZ and Surportuguese (SPZ Zones. OMZ plagiogranites are related with Cambrian-Ordovician rifting and represent a part of the felsic members of a bimodal magmatic suite and show oceanic plagiogranites affinities. SPZ plagiogranites are related with a Carboniferous volcano-plutonic calc-alkaline suite related with Variscan Orogeny. Both plagiogranites show many similar petrological and geochemical characteristics but display some different immobile elements ratios as La/Nb, Th/Nb, Th/La that are unaltered by metamorphism, magmatic differentiation and alteration processes and prove differences in their sources. SPZ plagiogranites show a more compositional homogeneity than OMZ ones. This is interpreted as a proof of cogenetic origin for SPZ plagiogranites and heterogeneous origin for OMZ plagiogranites, derived from the mix of different sources (astenospheric, lithospheric and crustal.

    En la Zona de Ossa-Morena (ZOM y en la Zona Surportuguesa (ZSP se encuentran plagiogranitos pertenecientes a asociaciones magmáticas y ambientes geodinámicos muy contrastados. Los primeros pertenecen a una asociación bimodal máfica-félsica relacionada con el rifting cámbrico-ordovícico y presentan bastantes afinidades con plagiogranitos oceánicos. Los segundos forman parte de una asociación volcánico-plutónica calcoalcalina carbonífera relacionada con la Orogenia Varisca. Ambos plagio-granitos son semejantes en diversos aspectos petrológicos y geoquímicos pero muestran diferencias en algunas relaciones de elementos inmóviles tales como La/Nb, Th/Nb, Th/La poco sensibles a los procesos de evolución magmática, metamorfismo y alteración y que son reflejo de la composición de las fuentes. Los plagiogranitos de la ZSP presentan una mayor homogeneidad composicional que los de la ZOM. Esto se

  13. Early Phanerozoic trace fossils from the Sierra Albarrana quartzites (Ossa-Morena Zone, Southwest Spain)

    NARCIS (Netherlands)

    Marcos, A.; Azor, A.; González, F.; Simancas, F.

    1991-01-01

    Three ichnogenera are described from a 50 to 500 m thick shallow-water sandstone-shale sequence (Sierra Albarrana Quartzites). The ichnofauna consists of the burrows of worm-like animals (Arenicolites, Monocraterion, and Skolithos). The age of this formation, previously considered to be Precambrian

  14. GREGORIO OSSA CERDA Y “OSSA Y ESCOBAR”. UN BANCO DE AVÍOS MINEROS, C. 1855-1884

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    LUIS VALENZUELA

    2011-05-01

    Full Text Available RESUMEN En el presente artículo se estudia un ejemplo de las instituciones de crédito creadas a mediados del siglo XIX para el fomento de la actividad minera en la zona de Atacama. La firma “Ossa y Escobar”, creada en 1855 por el rico banquero copiapino Gregorio Ossa Cerda, se convirtió en uno de los habilitadores mas importantes de la zona de Atacama, en pleno crecimiento debido al descubrimiento de ricas minas de plata como Tres Puntas y Chimbero en la década de 1840, y posteriormente extendió sus actividades al mineral boliviano de Caracoles, descubierto en 1870. Sin embargo, la no diversificación de sus actividades, y la decadencia de las explotaciones mineras, condujo a la decadencia y liquidación final de la firma en 1884. PALABRAS CLAVES: Instituciones de crédito, banco de avío minero, crédito, inversiones, especulación minera. ABSTRACT In this article, the author analyzes an example of credit institutions who have been founded at 1850s to foment the mining activity in Atacama‟s zone. The firm “Ossa y Escobar”, was created in 1855 by the rich Copiapó banker Gregorio Ossa Cerda, and became one of the most important mining ventures of a zone in rapid growth due to the discovery of rich silver mines in Tres Puntas and Chimbero, in the 1840s, and subsequently, extended to the Bolivian mine camp of Caracoles, discovered in 1870. However, the firm did not diversify its activities, and this, plus the decadence of mining in Atacama, carried the firm to its final liquidation in 1884. KEYWORDS: Credit institutions, mining lending bank, credit, investment, mining speculation.

  15. OSSA - An optimized approach to severe accident management: EPR application

    International Nuclear Information System (INIS)

    Sauvage, E. C.; Prior, R.; Coffey, K.; Mazurkiewicz, S. M.

    2006-01-01

    There is a recognized need to provide nuclear power plant technical staff with structured guidance for response to a potential severe accident condition involving core damage and potential release of fission products to the environment. Over the past ten years, many plants worldwide have implemented such guidance for their emergency technical support center teams either by following one of the generic approaches, or by developing fully independent approaches. There are many lessons to be learned from the experience of the past decade, in developing, implementing, and validating severe accident management guidance. Also, though numerous basic approaches exist which share common principles, there are differences in the methodology and application of the guidelines. AREVA/Framatome-ANP is developing an optimized approach to severe accident management guidance in a project called OSSA ('Operating Strategies for Severe Accidents'). There are still numerous operating power plants which have yet to implement severe accident management programs. For these, the option to use an updated approach which makes full use of lessons learned and experience, is seen as a major advantage. Very few of the current approaches covers all operating plant states, including shutdown states with the primary system closed and open. Although it is not necessary to develop an entirely new approach in order to add this capability, the opportunity has been taken to develop revised full scope guidance covering all plant states in addition to the fuel in the fuel building. The EPR includes at the design phase systems and measures to minimize the risk of severe accident and to mitigate such potential scenarios. This presents a difference in comparison with existing plant, for which severe accidents where not considered in the design. Thought developed for all type of plants, OSSA will also be applied on the EPR, with adaptations designed to take into account its favourable situation in that field

  16. New U-Pb SHRIMP zircon ages for pre-variscan orthogneisses from Portugal and their bearing on the evolution of the Ossa-Morena tectonic zone.

    Science.gov (United States)

    Cordani, Umberto G; Nutman, Allen P; Andrade, Antonio S; Santos, José F; Azevedo, Maria do Rosário; Mendes, Maria Helena; Pinto, Manuel S

    2006-03-01

    New SHRIMP U-Pb zircon ages for the Portalegre and Alcáçovas orthogneisses document a complex pre- Variscan history for the Iberian basement in Portugal. The available geochemical and geochronological data for the Alcáçovas orthogneiss (ca. 540 Ma) tend to favor its involvement in a Cadomian orogenic event. This is consistent with the development of an active continental margin setting at the end of the Proterozoic and supports a Gondwanan provenance for the Iberian crust. On the other hand, the Ordovician emplacement age obtained for the magmatic precursors of the Portalegre orthogneisses (497 +/- 10 Ma) provides additional evidence for the occurrence of rift-related magmatic activity during the Lower Paleozoic.

  17. New U-Pb SHRIMP zircon ages for pre-variscan orthogneisses from Portugal and their bearing on the evolution of the Ossa-Morena tectonic zone

    Directory of Open Access Journals (Sweden)

    Cordani Umberto G.

    2006-01-01

    Full Text Available New SHRIMP U-Pb zircon ages for the Portalegre and Alcáçovas orthogneisses document a complex pre- Variscan history for the Iberian basement in Portugal. The available geochemical and geochronological data for the Alcáçovas orthogneiss (ca. 540 Ma tend to favor its involvement in a Cadomian orogenic event. This is consistent with the development of an active continental margin setting at the end of the Proterozoic and supports a Gondwanan provenance for the Iberian crust. On the other hand, the Ordovician emplacement age obtained for the magmatic precursors of the Portalegre orthogneisses (497?10 Ma provides additional evidence for the occurrence of rift-related magmatic activity during the Lower Paleozoic.

  18. Development of OSSA(Operation Service Support Agreement) Simulator and Site Acceptance Test

    Energy Technology Data Exchange (ETDEWEB)

    Park, DaeSeung; Ahn, Sung-Jin; Lee, Jong-Beom [KHNP CRI, Daejeon (Korea, Republic of)

    2016-10-15

    Building the nuclear power plant is on the schedule, remaining question is who could operate the NPP after the construction is finished. OSSA is known as Operation Service Support Agreement, it is the contract between KHNP(Korea Hydro and Nuclear Power Co.,) and ENEC(Emirates Nuclear Energy Corporation) for United Arab Emirates Nuclear Power Plant operations support. The contract is mostly about the safety and reliability operations and as well as of the training of UAE operators to have better experiences. UAE operators needed to be trained and tested before they come to UAE for operate the NPP. The OSSA simulator was built because operator shall not make any mistakes even if the plant is not yet constructed. Simulator Training is a key for getting experiences without operating the actual plant, because the nuclear power plant never used as the test in real situations. Operators’ requirement is to have more than 2 years at site experiences and also they have to be trained 5 to 8 months of the training. The experience such as the site acceptance test will lead the future nuclear industry to meet the global standard and to lead the safety of the NPP. Under the OSSA agreement 400 KHNP experts will support the operations. Most of the operators were trained at the OSSA simulator which is most reliable simulator that can demonstrate satisfactory performance for the simulator.

  19. Quantification of fold growth of frontal antiforms in the Zagros fold and thrust belt (Kurdistan, NE Iraq)

    Science.gov (United States)

    Bretis, Bernhard; Bartl, Nikolaus; Graseman, Bernhard; Lockhart, Duncan

    2010-05-01

    The Zagros fold and thrust belt is a seismically active orogen, where actual kinematic models based on GPS networks suggest a north-south shortening between Arabian and Eurasian in the order of 1.5-2.5 cm/yr. Most of this deformation is partitioned in south-southwest oriented folding and thrusting with northwest-southeast to north-south trending dextral strike slip faults. The Zagros fold and thrust belt is of great economic interest because it has been estimated that this area contains about 15% of the global recoverable hydrocarbons. Whereas the SE parts of the Zagros have been investigated by detailed geological studies, the NW extent being part of the Republic of Iraq have experienced considerably less attention. In this study we combine field work and remote sensing techniques in order to investigate the interaction of erosion and fold growth in the area NE of Erbil (Kurdistan, Iraq). In particular we focus on the interaction of the transient development of drainage patterns along growing antiforms, which directly reflects the kinematics of progressive fold growth. Detailed geomorphological studies of the Bana Bawi-, Permam- and Safeen fold trains show that these anticlines have not developed from subcylindrical embryonic folds but they have merged from different fold segments that joined laterally during fold amplification. This fold segments with length between 5 and 25 km have been detected by mapping ancient and modern river courses that initially cut the nose of growing folds and eventually got defeated leaving behind a wind gap. Fold segments, propagating in different directions force rivers to join resulting in steep gorges, which dissect the merging fold noses. Along rapidly lateral growing folds (e.g. at the SE end of the Bana Bawi Anticline) we observed "curved wind gaps", a new type of abandoned river course, where form of the wind gap mimics a formed nose of a growing antiform. The inherited curved segments of uplifted curved river courses strongly

  20. Plan Estratégico de Marketing aplicado a la Empresa Studio Morena Nail&Spa

    OpenAIRE

    Delgado Gomezcoello, Carlos Javier

    2013-01-01

    El presente trabajo de investigación tiene como objetivo la elaboración de Plan estratégico de marketing aplicado a la empresa Studio Morena Nail & Spa, en cuyo contenido se delinearan en forma pragmática, coherente y objetiva, conceptos de pensamiento estratégico, análisis del entorno, variables mercadológicas y herramientas administrativas que coadyuven a la diferenciación con otras empresas que presten servicios similares en el mercado. Magister en Administración de Empresas

  1. Item reduction and psychometric validation of the Oily Skin Self Assessment Scale (OSSAS) and the Oily Skin Impact Scale (OSIS).

    Science.gov (United States)

    Arbuckle, Robert; Clark, Marci; Harness, Jane; Bonner, Nicola; Scott, Jane; Draelos, Zoe; Rizer, Ronald; Yeh, Yating; Copley-Merriman, Kati

    2009-01-01

    Developed using focus groups, the Oily Skin Self Assessment Scale (OSSAS) and Oily Skin Impact Scale (OSIS) are patient-reported outcome measures of oily facial skin. The aim of this study was to finalize the item-scale structure of the instruments and perform psychometric validation in adults with self-reported oily facial skin. The OSSAS and OSIS were administered to 202 adult subjects with oily facial skin in the United States. A subgroup of 152 subjects returned, 4 to 10 days later, for test–retest reliability evaluation. Of the 202 participants, 72.8% were female; 64.4% had self-reported nonsevere acne. Item reduction resulted in a 14-item OSSAS with Sensation (five items), Tactile (four items) and Visual (four items) domains, a single blotting item, and an overall oiliness item. The OSIS was reduced to two three-item domains assessing Annoyance and Self-Image. Confirmatory factor analysis supported the construct validity of the final item-scale structures. The OSSAS and OSIS scales had acceptable item convergent validity (item-scale correlations >0.40) and floor and ceiling effects (skin severity (P skin (P skin), as assessments of self-reported oily facial skin severity and its emotional impact, respectively.

  2. Comparative Bacteriological Study of Two Wild Boar Populations in Sierra Morena (Ja�n, Spain

    Directory of Open Access Journals (Sweden)

    Antonio NOTARIO

    2010-12-01

    Full Text Available The aim of this study was to investigate the presence of various bacterial species in the wild boar populations of Lugar Nuevo and Selladores-Contadero woodlands from Sierra Morena (Spain. Bacteriological analyses were carried out on a total of 229 wild boar individuals hunted in the period 2000-2003 in eleven experimental plots which are representative for the different biotopes of the area. The following species were detected: Brucella ovis, Clostridium sp., Corynebacterium sp., Streptococcus pneumoniae, Escherichia coli, Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis, Mannheimia haemolytica, Pasteurella multocida, Pseudomonas aeruginosa, Chlamydophila psittaci, Staphylococcus aureus and Staphylococcus sp. and the bacterial prevalence was estimated for each of them. The results provide useful indications of the health status of wild boar in both locations and highlight the potential of the wild boar populations to act as biological reservoirs of certain microorganisms that can be passed onto other vertebrate wild animals and humans.

  3. Las nuevas poblaciones de Sierra Morena bajo la superintendencia de don Pedro Pérez Valiente : oficios y colonos

    Directory of Open Access Journals (Sweden)

    Josefina Castilla Soto

    1992-01-01

    Full Text Available Las inquietudes de los ilustrados españoles del siglo xviii se manifestaron a través de la realización de múltiples proyectos en diferentes campos y con resultados muy distintos. Uno de ellos fue, precisamente, la colonización de Sierra Morena en la que convergían múltiples objetivos. Por una parte, la despoblación en que se veía sumida la Península hacía necesaria una inmediata repoblación sobre todo con inmigrantes alemanes y franceses que pudieran ocupar huecos geográficos para hacerlos productivos. En este sentido, la repoblación de Sierra Morena no fue un caso aislado, sino uno más en la mente de teóricos y políticos empeñados en colonizar gran parte de España, en especial la zona occidental de Andalucía, Extremadura y Castilla \\ Sierra Morena, sin embargo, marcó la pauta para repoblaciones simultáneas y posteriores en otros lugares.

  4. "Você é uma morena muito bonita": a trajetória textual de um elogio que fere

    OpenAIRE

    Melo,Glenda Cristina Valim de; Lopes,Luiz Paulo da Moita

    2015-01-01

    Este artigo analisa a trajetória textual do elogio Você é uma morena bonita nos comentários de participantes de dois fóruns distintos. Além disso, visamos identificar que ordens de indexicalidade são mobilizadas na trajetória deste elogio específico. Para tal, este estudo se embasa nos pressupostos sobre raça das Teorias Queer, nos construtos teórico-analíticos sobre trajetória textual e ordem de indexicalidade propostos por Blommaert (2010; BLOMMAERT;DONG, 2008) e pistas indexicais por Worth...

  5. Efectos de la implantación del modelo agroambiental y productivista en la Sierra Morena onubense

    Directory of Open Access Journals (Sweden)

    Ojeda Rivera, Juan Francisco

    2002-03-01

    Full Text Available Diversity —environmental, geographic and historic— sets the differientiated feature of Sierra Morena Huelva. This paper looks into the whole process of institutionalization of Environmental Matters as well as the adoption of postproductivism in this area. Given the individual characteristics of this country, the pattern that it would fit into —following recent C.A.P. policies— is that of environmental agriculture and scenary-related activities. Still, new flashes of economic diversity dynamism are being witnessed — spurred by the diversity of territorial structure and previous productive dynamism—; there are factors which have been ignored by Mainstream Greeen Enviromental perspective.

    [es] La diversidad -natural, geográfica e histórica- constituye el elemento distintivo de la Sierra Morena de Huelva. En este artículo se analiza e interpreta el proceso de institucionalización del ambientalismo y de implantación del posproductivismo en dicha comarca que —por sus peculiares características— quedaría encuadrada en el modelo de agricultura ambiental y paisajística propugnada por la más reciente P.A.C. No obstante, se observan allí importantes destellos de dinamismo económico —relacionados con la diversidad de su estructura territorial y con su vivacidad productiva previa— que no han sido suficientemente captados ni valorados por el ambientalismo clorofílico. [fr] La diversité —naturelle, géografique et historique—, constitue l'élément distinctif de la Sierra Morena de Huelva. Dans cet article on va analyser et interpréter le procès d'institutionnalisation de l'environnement et l'implantation de l'activité postproductive dans cette région qui, grâce a ses caractéristiques particulières, on peut la situer dans un modèle d'agriculture écologique et paysagistique propulsé par la plus récente P.A.C. Malgré tout, on peut trouver là des importants signes de dynamisme économique —par rapport

  6. Comparative characteristics of metacarpal bones (Ossa metacarpi and finger articles (Ossa digitorum pedis seu phalanges digitorum of roe deer (Capreolus capreolus and sheep (Ovis aries in order to determine animal species

    Directory of Open Access Journals (Sweden)

    Blagojević Miloš

    2016-01-01

    Full Text Available The method of determining which animal species the bones, on the basis of mor­phological characteristics, belong to, is one of the most commonly used in forensic cases (poaching, fraud, theft, counterfeiting of food of animal origin.For identification of metacarpal bones (Ossa metacarpi as well as finger articles (Ossa digitorum pedis seu phalanges digitorum there were used distal parts of front limb bones, taken from 6 roe deers and 7 sheep. Afer the separation from the soft tissues, the bones were boiled in an autoclave, and for bleaching and degreasing they were kept in 3% solution of hydrogen peroxide (H2O2. The bones were air dried, and then photographed. In roe deer, there are four developed metacarpal bones: the second, the third, the fourth and the fifth. The third and the fourth mrtacarpal bones form one bone, named the main metacarpal bone. The second and the fifth metacarpal bones are connected by con­nective tissue to distal parts of the third and the fourth metacarpal bones. In sheep, there are three developed metacarpal bones: the third, the fourth and the fifth. The thord and the fourth metacarpal bones are, as in roe deer, grown together along the entire length, forming in that way one single bone - the main metacarpal bone. On the distal part of front limb in roe deer there are four fingers, and in sheep two. In roe deer the second, the third, the fourth and the fifth finger are developed, and in sheep, the third and the fourth. Each finger of front limbs, both in roe deer and in sheep, consists of three articles: Phalanx proximalis, Phalanx media i Phalanx distalis. In the case of certain bone missing, a roe deer can be distinguished from a sheep on the basis of the tird article of the third and fourth finger, which is of characteristic appearance. Plantar edge in roe deer is peaked, and in sheep it is blunt. The method of determining which animal species the bones, on the basis of mor­phological characteristics of roe deer

  7. Spatial characterization of soil properties and influence in soil formation in oak-grassland of Sierra Morena, S Spain

    Science.gov (United States)

    Román-Sánchez, Andrea; Cáceres, Francisco; Pédèches, Remi; Giráldez Cervera, Juan Vicente; Vanwalleghem, Tom

    2016-04-01

    The Mediterranean oak-grassland ecosystem is very important for the rural economy and for the biodiversity of south-western European countries like Spain and Portugal. Nevertheless these ecosystems are not well characterized especially their soils. In this report soil carbon has been evaluated and related to other properties. The principal factors controlling the structure, productivity and evolution of forest ecosystems are bedrock, climate, relief, vegetation and time. Soil carbon has an important influence in the soil and ecosystem structures. The purpose of this study is to determine the relationship between relief, soil properties, spatial distribution of soil carbon and their influence in soil formation and geomorphology. This work is part of another study which aims to elucidate the processes involved in the soil formation and to examine their behaviour on long-term with a modelling. In our study area, located in oak-grassland of Sierra Morena, in Cordoba, S Spain, have been studied 67 points at 6 depths in 262 hectares in order to determine carbon content varying between 0-6%, soil properties such as soil depth between 0-4 m, horizon depth and the rocks amount in surface. The relationship between the soil carbon, soil properties and the relief characteristic like slope, aspect, curvature can shed light the processes that affect the mechanisms of bedrock weathering and their interrelationship with geomorphological processes.

  8. The Landscape of the Dehesa in the Sierra Morena of Jaén (Spain) – the Transition from Traditional to New Land Uses

    OpenAIRE

    Antonia Paniza Cabrera

    2015-01-01

    This paper tracks the evolution of the area covered by the dehesa in Sierra Morena from the mid 20th century to the present day, in an attempt to identify those areas in which traditional land uses still hold sway and others in which new land uses are appearing in relation to emerging business activities. These new uses have brought about an important transformation in the landscape of the dehesa, which in some areas is being replaced by other more profitable forms of land use...

  9. Petrophysical Characterization of Arroyal Antiform Geological Formations (Aguilar de Campoo, Palencia) as a Storage and Seal Rocks in the Technology Development Plant for Geological CO2 Storage (Hontomin, Burgos)

    International Nuclear Information System (INIS)

    Campos, R.; Barrios, I.; Gonzalez, A. M.; Pelayo, M.; Saldana, R.

    2011-01-01

    The geological storage program of Energy City Foundation is focusing its research effort in the Technological Development and Research Plant in Hontomin (Burgos) start off. The present report shows the petrophysical characterization of of the Arroyal antiform geological formations since they are representatives, surface like, of the storage and seal formations that will be found in the CO 2 injection plant in Hontomin. In this petrophysics characterization has taken place the study of matrix porosity, specific surface and density of the storage and seal formations. Mercury intrusion porosimetry, N 2 adsorption and He pycnometry techniques have been used for the characterization. Furthermore, it has carried out a mineralogical analysis of the seal materials by RX diffraction. (Author) 26 refs.

  10. The Landscape of the Dehesa in the Sierra Morena of Jaén (Spain – the Transition from Traditional to New Land Uses

    Directory of Open Access Journals (Sweden)

    Antonia Paniza Cabrera

    2015-10-01

    Full Text Available This paper tracks the evolution of the area covered by the dehesa in Sierra Morena from the mid 20th century to the present day, in an attempt to identify those areas in which traditional land uses still hold sway and others in which new land uses are appearing in relation to emerging business activities. These new uses have brought about an important transformation in the landscape of the dehesa, which in some areas is being replaced by other more profitable forms of land use, in particular with olive groves. In many areas where the dehesa still exists, livestock farming has been replaced by hunting, which has led to internal changes in the structure of the dehesa with an increase in scrubland. Another emerging land use is tourism-related activities, which many farmers now use to complement their income from livestock and which help preserve the traditional landscape of the dehesa.

  11. Los equinodermos (Cystoidea. Homalozoa. Stelleroidea. Crinoidea del Paleozoico Inferior de los Montes de Toledo y Sierra Morena (España

    Directory of Open Access Journals (Sweden)

    Gutiérrez Marco, J. C.

    1984-12-01

    Full Text Available The presence of the cystoids Codiocystis and Phiyctocystis in the Llandeilo of Spain, associated to an undetermined Diploporite which may be a new genus, in confirmed. Several species of the genus Calix are described, some of them in open nomenclature, certain forms bearing a pentaradiated peristome. New samples of Homalozoa collected in the Middle Cambrian of Sierra Morena (Decacystis and the Lower Llanvirn of the Toledo Mountains (Mitrocystites are quotated, as well as an Asterozoa (Polaeura, found for the first time in Spain. The study of the echinoderm fauna collected in the "Tristani beds" (Llanvirn-Llandeilo of the Spanish Central-iberian zone allow to establish conclusions of biostratigraphic and paleobiogeographic interest.

    Se confirma la presencia de los cistideos Codlocystis y Phlyctocystis en el Llandeilo de España, junto a un Diploporito indeterminado que quizá corresponda a un nuevo género. Se describen diversas especies del género Calix, alguna de ellas en nomenclatura abierta, observándose en ciertas formas la existencia de un peristoma pentarradiado. Se citan nuevos ejemplares de Homalozoos procedentes del Cámbrico medio de Sierra Morena (Decocystls y del Llanvirn inferior de los Montes de Toledo (Mitrocystites, así como un Asterozoo, perteneciente al género Palaeura, descubierto por vez primera en España. El análisis de la fauna de equinodermos de las "capas con Tristani" (Llanvirn-Llandeilo de la zona Centro-ibérica española, perm ite, además, establecer diversas conclusiones de interés bioestratigráfico y paleobiogeográfico.

  12. Determinación de los factores que controlan la formación de silicatos de Mn en las litologías manganesíferas del sector central de Ossa-Morena mediante la aplicación de técnicas estadísticas multivariante

    Directory of Open Access Journals (Sweden)

    Chica Olmo, M.

    1993-04-01

    Full Text Available This eaper aims to show how multivariate statistical procedures, principal component analysis (PCA and correspondence analysis (CA, can be used to identify sorne critical mineral crystallization factors during metamorphism of Mn-rich lithologies. The data set was obtained from a petrographic and geochemical study of Mn-lithologies from Southern Iberian Massif, Spain. We considered three types of variables in the system: mineralogical variables, bulk chemistry variables and a physical variable (oxygen fugacity. PCA was applied to the compositional variables with the aim of recognizing groups of elements according to the geological evidence. We obtained four components, which were used as new variables that account for the variance of the compositional data in a more summarized manner. These new compositional variables, together with the mineralogical and physical variables, were treated in the CA. The plot of the variables on the factor l-factor 2 plane reveals that tephroite crystallization is controlled by a compositional variable representing low values of ratio Si/(Mn + Fe in the rocks. Moreover, it is possible to deduce from this plot the importance of high oxygen fugacity conditions on the crystallization of piemontite. The third factor shows how the crystallization of spessartine does not require very restrictive physical-chemical conditions.La utilización de técnicas estadísticas multivariantes, análisis de componentes principales (ACP y análisis de correspondencias (AC, ha hecho posible idenlificar los factores determinantes de la cristalización de algunos minerales en las litologías ricas en Mn del área de Oliva de la Frontera (Macizo Ibérico, SW de España. El estudio petrológico y geoquímico de estas litologías nos hizo considerar tres tipos diferentes de variables: mineralógicas (presencia-ausencia de minerales, composicionales (elementos químicos mayoritarios y físicas (fugacidad de oxígeno. El ACP fue aplicado a las variables composicionales con el objetivo de reconocer agrupaciones de elementos coherentes con las posibles fuentes geológicas de elementos del entorno. Las cuatro componentes obtenidas fueron utilizadas como las nuevas variables composicionales del sistema. El AC fue realizado considerando estas nuevas variables composicionales junto a las variables físicas y mineralógicas. Los tres primeros factores del AC explicaron una varianza próxima al 75 %. La proyección de las variables sobre el plano definido por los factores 1 y 2 revela que la cristalización de la tefroita está controlada poi una variable composicional que representa bajos valores de la razón Si/(Mn + Fe en las rocas. Además, este diagrama pone de manifiesto la importancia de las condiciones de fugacidad de oxígeno sobre la cristalización de la piemontita. El tercer factor indica que la espesartina es el silicato de Mn que requiere condiciones menos restrictivas para su cristalización.

  13. The messaoudensis-trifidum acritarch assemblage (Ordovician: late Tremadoc-early Arenig) of the Barriga Shale Formation, Sierra Morena (SW-Spain).

    Science.gov (United States)

    Servais, T; Mette, W

    2000-12-01

    The "messaoudensis-trifidum acritarch assemblage" is currently considered to be characteristic of latest Tremadoc-earliest Arenig cold-water environments on the periphery of Gondwana, at high latitudes in the southern hemisphere. An integrated biostratigraphical study on both acritarchs and graptolites was until now only available for localities in northwest England. Reinvestigation of the "messaoudensis-trifidum acritarch assemblage" from the Barriga Formation (Sierra Morena, southwestern Spain), which contains some graptolite horizons that can be attributed to the latest Tremadoc (pre-phyllograptoides and pre-approximatus graptolite biozones), strengthens the biostratigraphical potential of the "messaoudensis-trifidum assemblage", and the importance of some of the acritarch taxa recovered from these levels. It is concluded that the acritarch genera Coryphidium Vavrdová, 1972, Peteinosphaeridium Staplin et al., 1965 emend. Playford et al., 1995, Striatotheca, Burmann, 1970, and the Veryhachium lairdii group (rectangular veryhachiids) appear in the latest Tremadoc, and should not be considered as indicators of the base of the Arenig, as previously suggested.

  14. Ictiotoxismo por consumo de barracuda (Sphyraena barracuda y morena manchada (Gymnothorax moringa en la comunidad de pescadores artesanales de Tasajera, caribe colombiano

    Directory of Open Access Journals (Sweden)

    Juan Diego Gaitán Espitia

    2013-10-01

    Full Text Available ResumenSe estudió un evento de ictiotoxismo en la comunidad de pescadores de la población de Tasajera, departamento del Magdalena. La intoxicación por ciguatera fue diagnosticada a 7 individuos cuyas edades oscilaban entre los 17 y 53 años (63,4% de rango de edades de los pescadores del sector, con síntomas de vómito (100%, dolor muscular en miembros inferiores (71,4%, espasmos abdominales (85,7%, diarrea (100%, entumecimiento y hormigueo de cara, manos, pies (85,7%, mareo (100%, y brote cutáneo (14,2%, los síntomas en la mayoría de los casos desaparecieron en un lapso de 8 a 12 días. Se determinó como causa principal del evento de ciguatera el consumo de carne de barracuda (Sphyraena barracuda y morena (Gymnothorax moringa. (Duazary 2007; 2: 160 - 167AbstractAn icthyotoxism event was studied in the Tasajera fishermen’s community, department of Magdalena. The ciguatera intoxication was diagnosed to 7 individuals whose ages were ranging between 17 and 53 years (63,4 %, with symptoms of vomit (100 %, muscular pain in low members (71,4 %, abdominal spasms (85,7 %, diarrhea (100 %, numbness and tingling of face, hands, feet (85,7 %, sickness (100 %, and cutaneous outbreak (14,2 %, the symptoms in the majority of the cases disappeared in a space from 8 to 12 days. The consumption of the barracuda (Sphyraena barracuda spotted moray (Gymnothorax moringa meat was determined as principal source of the ciguatera event.Key words: Icthyotoxism; Ciguatera; Intoxication; Colombian Caribbean.

  15. Protección y gran propiedad en Sierra Morena: el Parque Natural de la Sierra de Hornachuelos (Córdoba como caso emblemático

    Directory of Open Access Journals (Sweden)

    Alfonso Mulero

    2003-01-01

    Full Text Available En buena medida la reciente expansión de los espacios naturales protegidos en España ha sido posible por la voluntad política de declarar como tales a extensos espacios serranos de propiedad privada mayoritaria, dándose paso de esta forma a un modelo de protección inusual en nuestro país hasta los años ochenta. En este contexto, el Parque Natural de la Sierra de Hornachuelos (Córdoba resulta ser un ejemplo antológico de convivencia entre protección y gran propiedad privada, donde pueden observarse y evaluarse las repercusiones que la declaración del Parque ha tenido en los predios particulares y en su régimen de aprovechamientos, del mismo modo que, en sentido contrario, pueden verificarse las limitaciones y dificultades que encuentra la administración ambiental por el hecho de que el 98% de la superficie protegida esté en manos privadas. La permanencia histórica en este territorio de una estructura de gran propiedad asociada a una decidida especialización cinegética desde principios de siglo y a un extraordinario aislamiento, son elementos a tener en cuenta para interpretar el valor ecológico actual de la Sierra de Hornachuelos y su consideración como pieza clave en el entramado protector de Sierra Morena, lo que le ha valido hasta el momento la declaración como Parque Natural, Zona de Especial Protección para las Aves, Reserva de la Biosfera y, en breve, Lugar de Interés Comunitario.

  16. Petrophysical Characterization of Arroyal Antiform Geological Formations (Aguilar de Campoo, Palencia) as a Storage and Seal Rocks in the Technology Development Plant for Geological CO{sub 2} Storage (Hontomin, Burgos); Caracterizacin Petrofisica de las Formaciones Geologicas de la Antiforma de Arroyal (Aguilar de Campoo, Palencia) como Posibles Rocas Almacen y Sello en la Planta de Desarrollo Tecnologico de Almacenamiento Geologico de CO{sub 2} (Hontomin, Burgos)

    Energy Technology Data Exchange (ETDEWEB)

    Campos, R.; Barrios, I.; Gonzalez, A. M.; Pelayo, M.; Saldana, R.

    2011-05-13

    The geological storage program of Energy City Foundation is focusing its research effort in the Technological Development and Research Plant in Hontomin (Burgos) start off. The present report shows the petrophysical characterization of of the Arroyal antiform geological formations since they are representatives, surface like, of the storage and seal formations that will be found in the CO{sub 2} injection plant in Hontomin. In this petrophysics characterization has taken place the study of matrix porosity, specific surface and density of the storage and seal formations. Mercury intrusion porosimetry, N{sub 2} adsorption and He pycnometry techniques have been used for the characterization. Furthermore, it has carried out a mineralogical analysis of the seal materials by RX diffraction. (Author) 26 refs.

  17. PROFUNDIZACIÓN DEL TOPE DE PERMAFROST Y TENDENCIAS EN LA DINÁMICA CRIOGÉNICA, A PARTIR DE 1989, EN EL GLACIAR DE ESCOMBROS COMPUESTO DEL VALLE DE MORENAS COLORADAS, MENDOZA, ARGENTINA.

    Directory of Open Access Journals (Sweden)

    Darío Trombotto Liaudat

    2007-12-01

    Full Text Available Los glaciares de escombros (rockglaciers son las geoformas periglaciales con permafrost reptante más típicas e importantes, por su volumen en criosedimentos congelados y hielo, de los Andes Centrales. La presente contribución muestra ejemplos de la marcha de las temperaturas y la profundización del tope de permafrost en dos puntos de monitoreo (Balcón I y II del glaciar de escombros compuesto de Morenas Coloradas, Cordillera Frontal, en la provincia de Mendoza, Argentina. El engrosamiento de la capa activa en la lengua terminal, o límite inferior del creeping permafrost en este valle, de 4,9 m a 7,5 / 7,8 m en los últimos años, así como la tendencia de la dinámica criogénica desde 1992, y la geomorfología (termokarst inactivos en los frentes, expresan el fenómeno de calentamiento que se está detectando también en otros lugares del mundo. Estas variaciones térmicas sugieren cambios en la estructura interna de estas mesoformas. Asimismo, como otra situación geofísica paralela, el cálculo de difusividad térmica en Balcon II ( ̃ = 0.14 × 10-6 m2/s; Trombotto y Borzotta, 2007, a 3770 m de altura, permite correlacionar el bajo valor obtenido con una mejor y más larga conservación del hielo por debajo de los criorregolitos que son en este caso, principalmente, de origen volcánico. Los cambios térmicos detectados en esta zona piloto tendrían una consecuencia directa en el ambiente criogénico local y son un ejemplo para la situación regional del permafrost andino de los glaciares de escombros. Las variaciones descriptas se expresan a través de la profundización del tope de permafrost, formación de termokarst y reactivación de los más antiguos a lo largo del valle, y pérdida de movimiento, o de la criodinámica, en los taludes frontales (“narices” en la parte inferior y de menor altura de las geoformas investigadas. El trabajo promueve también a colocar mayor atención en la posible influencia que pueden tener estos

  18. Deformation monitoring in Zafarraya fault and Sierra Tejeda antiform (Betic cordillera, Spain) using satellite radar interferometry

    NARCIS (Netherlands)

    Ruiz-Armenteros, A.M.; Delgado, J.M.; Sousa, J.J.; Hanssen, R.F.; Caro, M.; Gil, A.J.; Galindo-Zaldívar, J.; Galdeano, C.S. de

    2015-01-01

    The Betic-Rif cordilleras are build-up in the western Mediterranean by the deformations related to the Eurasian-African plate boundary. The recent NW-SE convergence produces the simultaneous development of large folds and faults in the central part of the Internal Zones of the Betic Cordilleras,

  19. Casa en Sierra Morena Huarochirí, Perú

    OpenAIRE

    Doblado, Juan Carlos

    2014-01-01

    La horizontalidad en la conformación de esta casa busca acentuar su relación con el paisaje de la cordillera de Los Andes. Se organiza en dos volúmenes horizontales paralelos, desfasados y semitransparentes, que se clavan a la pendiente. Al interior, la vivienda se caracteriza por poder integrar sus espacios a través de mamparas corredizas. En el primer cuerpo se encuentran los espacios comunes, la cocina y dormitorios, mientras que en el segundo volumen se sitúan un estar familiar y los dorm...

  20. Stratigraphy, palynology and organic geochemistry of the Devonian-Mississippian metasedimentary Albergaria-a-Velha Unit (Porto-Tomar shear zone, W Portugal)

    Czech Academy of Sciences Publication Activity Database

    Machado, G.; Franců, E.; Vavrdová, Milada; Flores, D.; Fonseca, P. E.; Rocha, F.; Gama Pereira, L. C.; Gomes, A.; Fonseca, M.; Chaminé, H. I.

    2011-01-01

    Roč. 55, č. 2 (2011), s. 139-164 ISSN 1641-7291. [International Palynological Conference of the International Commission of the Paleozoic Microflora (CIMP). Warsaw-Kielce, 13.09.2010-19.09.2010] Institutional research plan: CEZ:AV0Z30130516 Keywords : Mississippian * Late Devonian * Ossa-Morena Zone * Porto-Tomar shear zone * palynology * organic geochemistry * turbidite systems * provenance * phytoplankton Subject RIV: DB - Geology ; Mineralogy Impact factor: 0.844, year: 2011 http://gq.pgi.gov.pl/gq/article/viewFile/7606/pdf_4

  1. Extremadura (Spain): a case to be considered as Global Heritage Stone Province

    Science.gov (United States)

    Mota, Maribel; Tejado, Juanjo; Pereira, Dolores

    2015-04-01

    Extremadura is geologically located in the Iberian Massif, belonging part of the Central Iberian Zone, in the north of the region, and the Ossa Morena zone, in the south of it. The Central Iberian Zone is characterized by the abundance of clastic metasedimentary rocks and greywacke, sandstones, shales, conglomerates, quartzites and lesser amounts of carbonate materials such as limestone and dolomite (600-300 Ma). Also featured are Hercynian granitic intrusions. The rocks from the Ossa-Morena zone are metamorphic, intrusive igneous and volcanic (650-300 Ma). Extremadura, given its strategic geographical position, has been the site of human settlement since ancient times, and this civilisation has left its influence on the building materials used in buildings and monuments. The rocks used in building, are directly related to the geology of the immediate area, since rock outcrops, near the construction are mostly granites, slates and marbles. The historic and artistic heritage from Extremadura includes Roman treasures (like the bridges located in the Via de la Plata, dams, walls and milestones), Islamic and Christian treasures as well as medieval and Renaissance Jewish treasures. Extremadura has three World Heritage Sites declared by UNESCO: the old town of Cáceres, the archaeological site at Merida and the monastery of Guadalupe. The latter is built mainly of bricks and masonry. In Merida, granites and diorites of various facies of the batholiths located north of the city are used together with Sierra Carija's marble and quartzite alluvial gravels from the river Guadiana. Among the constructions in Merida, granite utilisation in the theater and amphitheater, aqueduct of Miracles and the Proserpina dam, are remarkable. The old town of Cáceres is characterised by the presence of narrow streets and monuments, medieval churches and Renaissance palaces, built with granite and flanked by a wall constructed during the Muslim period. This granite comes from the quarries

  2. Notas sobre la historia de la garza morena ardea cocoi (aves en Colombia

    Directory of Open Access Journals (Sweden)

    José Ignacio Borrero H.

    1982-01-01

    Full Text Available Una revisión de la bibliografía sobre esta especie, demuestra que si bien existe una serie de notas relacionadas con su distribución geográfica, prácticamente nada se ha escrito en relación con sus costumbres, fuera claro está, de comentarios muy generales consignados en manuales sobre faunas regionales.

  3. Open Source Service Agent (OSSA) in the intelligence community's Open Source Architecture

    Science.gov (United States)

    Fiene, Bruce F.

    1994-01-01

    The Community Open Source Program Office (COSPO) has developed an architecture for the intelligence community's new Open Source Information System (OSIS). The architecture is a multi-phased program featuring connectivity, interoperability, and functionality. OSIS is based on a distributed architecture concept. The system is designed to function as a virtual entity. OSIS will be a restricted (non-public), user configured network employing Internet communications. Privacy and authentication will be provided through firewall protection. Connection to OSIS can be made through any server on the Internet or through dial-up modems provided the appropriate firewall authentication system is installed on the client.

  4. Birth and demise of the Rheic Ocean magmatic arc(s): Combined U-Pb and Hf isotope analyses in detrital zircon from SW Iberia siliciclastic strata

    Science.gov (United States)

    Pereira, M. F.; Gutíerrez-Alonso, G.; Murphy, J. B.; Drost, K.; Gama, C.; Silva, J. B.

    2017-05-01

    Paleozoic continental reconstructions indicate that subduction of Rheic oceanic lithosphere led to collision between Laurussia and Gondwana which was a major event in the formation of the Ouachita-Appalachian-Variscan orogenic belt and the amalgamation of Pangea. However, arc systems which record Rheic Ocean subduction are poorly preserved. The preservation of Devonian detrital zircon in Late Devonian-Early Carboniferous siliciclastic rocks of SW Iberia, rather than arc-related igneous rocks indicates that direct evidence of the arc system may have been largely destroyed by erosion. Here we report in-situ detrital zircon U-Pb isotopic analyses of Late Devonian-Early Carboniferous siliciclastic rocks from the Pulo do Lobo Zone, which is a reworked Late Paleozoic suture zone located between Laurussia and Gondwana. Detrital zircon age spectra from the Pulo do Lobo Zone Frasnian formations show striking similarities, revealing a wide range of ages dominated by Neoproterozoic and Paleoproterozoic grains sourced from rocks typical of peri-Gondwanan terranes, such as Avalonia, the Meguma terrane and the Ossa-Morena Zone. Pulo do Lobo rocks also include representative populations of Mesoproterozoic and Early Silurian zircons that are typical of Avalonia and the Meguma terrane which are absent in the Ossa-Morena Zone. The Famennian-Tournaisian formations from the Pulo do Lobo Zone, however, contain more abundant Middle-Late Devonian zircon indicating the contribution from a previously unrecognized source probably related to the Rheic Ocean magmatic arc(s). The Middle-Late Devonian to Early Carboniferous zircon ages from the siliciclastic rocks of SW Iberia (South Portuguese, Pulo do Lobo and Ossa-Morena zones) have a wide range in εHfT values (- 8.2 to + 8.3) indicating the likely crystallization from magmas formed in a convergent setting. The missing Rheic Ocean arc was probably built on a Meguma/Avalonia type basement. We propose for the Pulo do Lobo Zone that the

  5. Reproducción de la morena, Gymnothorax equatorialis (Pisces: Muraenidae en Jalisco y Colima, México

    Directory of Open Access Journals (Sweden)

    G Lucano-Ramírez

    2008-03-01

    Full Text Available Con el fin de analizar los aspectos reproductivos de Gymnothorax equatorialis se recolectaron mensualmente 707 organismos en las costas de Jalisco y Colima, México, de diciembre de 1995 a diciembre de 1998 y de agosto a diciembre de 1999. Las hembras fueron más numerosas y presentaron una longitud (54.7 cm mayor a la de los machos (52.1 cm. La fecundidad total mínima fue de 9 660 huevos, la máxima de 99 992 y la media fue 32 029 huevos. La talla en la que el 50 % de los individuos presentan gónadas maduras (L50 fue de 43.7 cm de longitud total en hembras y de 42.7 cm en machos. Los ovarios presentaron dos tipos de ovocitos, los pequeños inmaduros en fase cromatina nucleolo (85.1 µm y los grandes maduros en fase de vitelogénesis secundaria (701.6 µm. En el testículo maduro se observó una gran cantidad de espermatozoides en el tubo seminal y el desarrollo del testículo es de tipo lobular. Con base en las características de las gónadas y la evolución temporal del índice gonadosomático, se concluye que G. equatorialis se reproduce dos veces al año (a mediados y finales del año.Reproduction of the fish Gymnothorax equatorialis (Pisces: Muraenidae in Jalisco and Colima, Mexico. A total of 707 Gymnothorax equatorialis were collected monthly in the Jalisco and Colima coast, Mexico, from December 1995 to December 1998 and from August to November 1999, in order to determine their reproduction patterns. Females outnumbered and had longer bodies (mean length 54.7 cm than males (52.1 cm. The minimum, maximum and mean values of total fecundity were respectively 9 660, 99 992 and 32 029 eggs. The total body length at which 50 percent of individuals have ripe gonads (L50 was 43.7 cm for females and 42.7 cm TL for males. Ovaries had two main types of oocytes: small inmature in cromatin nucleolus phase (85.1 µm and large mature in secundary vitellogenesis phase (701.6 µm. High numbers of spermatozoa were observed in the seminal tubes of ripe testicles, which presented a lobular development. Based in gonad features and temporal changes in the gonad-somatic index, it is concluded that G. equatorialis has two relatively short reproduction periods (at the middle and at the end of the year. Rev. Biol. Trop. 56 (1: 153-163. Epub 2008 March 31.

  6. Asutamisvabadus kehtib ka madala maksumääraga territooriumidel : Euroopa Kohtu lahend : Cadbury Scweppes versus Suurbritannia / Alari Ossa

    Index Scriptorium Estoniae

    Ossa, Alari

    2006-01-01

    Euroopa Kohtu eelotsusetaotluse alusel tehtud lahendist (12. 09. 2006 C-196/04) Cadbury Schweppesþi ja Suurbritannia maksuhalduri vaidluse kohta, mis puudutas madala maksumääraga territooriumil asuva tütarühingu tulu omistamist Suurbritannia emaühingule

  7. The Precambrian/Lower Cambrian pluton from Vila Nova (Central Portugal

    Directory of Open Access Journals (Sweden)

    Reis, A. I.M.

    2010-06-01

    Full Text Available The Vila Nova pluton is a small, Pre-Variscan granitic body that intruded rocks of the Central Iberian Zone near the contact with the Ossa Morena Zone and is affected by several shear zones and faults. Its contact metamorphic aureole is constituted by micaschist with porphyroblasts in the outer zone and hornfels in the inner zone. Small metasedimentar xenoliths are dispersed all over the body. The pluton has a great mineralogical heterogeneity with pronounced variations in muscovite/biotite and plagioclase/microcline contents and is classified as granite, granodiorite or tonalite. It is a leucogranite, highly peraluminous (A/CNK = 1.31 – 1.64, magnesian and calc-alkaline to alkaline-calcic. The variation diagrams show curvilinear trends with silica. Eu/Eu* = 0.47 – 0.77 and there is a slight enrichment in LREE relative to HREE. The normalized diagrams indicated dominantly crustal granite, related to subduction. U-Pb isotopic data of zircon and monazite gives 540-542 Ma age.

    El plutón de Vila Nova es un pequeño cuerpo granítico pre-varisco, que intruyó en las rocas de la Zona Centro Ibérica, cerca del contacto con la Zona de Ossa Morena, siendo afectado por varias fallas y zonas de cizalla. Su aureola de metamorfismo de contacto consiste en esquistos con porfiroblastos y corneanas. Pequeños xenolitos metasedimentarios aparecen dispersos por todo el cuerpo granítico. Presenta una gran diversidad mineralógica, con amplias variaciones en las relaciones biotita/moscovita y microclina/plagioclasa, siendo clasificado como tonalita-granodiorita-granito. Se trata de un leucogranito fuertemente peralumínico (A/CNK = 1.31 – 1.64, magnesiano y calco-alcalino a alcalino-cálcico. Los diagramas muestran variaciones curvilíneas con la variación de sílice. Eu/Eu* = 0.47 – 0.77 y hay un ligero enriquecimiento de LREE en relación con HREE. Los diagramas indican que la norma es un granito dominante de la corteza, relacionados con la

  8. La sucesión paleozoica en el sinforme de la Codosera-Puebla de Obando (provincias de Cáceres y Badajoz, SO de España

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    Soldevila Bartolí, J.

    1992-12-01

    Full Text Available In the Codosera-Puebla de Obando area, Paleozoic rocks are preserved in a syncline core forming a small mountain chain raising above the surrounding Precambrian areas. This paleozoic syncline is located in the southern part of the Central Iberian zone, near its southern boundary with the Ossa-Morena zone. The Paleozoic sequence starts with a 100 m thick quartzite unit of Arenig age (equivalent to the Armorican quartzite. Above, there is an essentially terrigenous sequence consisting of quartzites, sandstones and slates, about 1,800 m thick. Towards the upper part of the sequence there are also conglomerate and carbonate levels as well as interlayered basic volcanic rocks. The age of the sequence ranges from Early Ordovician to Late Devonian with a hiatus comprising the Middle Devonian. A complete stratigraphical sequence can only be obtained from the northern limb of the syncline, because of the imbricate structure of the southern limbo Even in the southern limb there is frequently a tectonic reduction of some stratigraphical units. The faunas are in general scarce in the sequence, however the Silurian and the Late Devonian have been paleontologically substantiated for the first time in the area.El sinforme de La Codosera-Puebla de Obando, situado en la parte meridional de la Zona Centroibérica junto a su límite con la Zona de Ossa-Morena, está constituido por materiales paleozoicos cuyo contacto con los materiales precámbricos que le rodean se realiza mediante una discordancia angular, o bien mediante un contacto mecánico. La sucesión paleozoica se inicia con un tramo cuarcítico de edad Arenig y de unos 100 m de espesor (Cuarcita Armoricana y está constituida esencialmente por materiales detríticos formados por cuarcitas, areniscas y pizarras que se encuentran alternando en distintos niveles. Hacia el tercio superior de la sucesión aparecen también pequeños lechos de conglomerados, materiales carbonatados y rocas volcánicas b

  9. Las mineralizaciones de barita de Cerro del Hierro (Sevilla. Características mineralógicas y geoquímica

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    Galán Huertos, E.

    1992-08-01

    Full Text Available Different barite deposits (stratabound, vein and karstic types are occurring in the Lower Cambrian carbonatic materials of the Cerro del Hierro, Sevilla (Ossa-Morena Zone. Calcite, hematite, goethite and minor chalcopyrite are common associated minerals, with limonite and malachite as alterations. The content of barite can be as high as 98 %. There is a close relationship between barite type and Sr content (vein 34S ranges between 32,7 ‰ (stratiform barites and 20,7 ‰ (epigenetic barites. The 87Sr/86Sr ratio for the epigenetic barites oscillates between 0.70873 and 0.71112 which could be the result of the infiuence of different mineralization solutions. A primary origin for the stratabound barites is proposed, in relation with the diagenesis of the limestones occurred during the Lower Cambrian. Epigenetic barites were formed after the Hercynian Orogenesis by remobilization of the stratiform ores, with Ba and Sr supplied from the lixiviation of the host rocks. The last process could be much more important for the karstic barite formation.En los materiales carbonatados del Cámbrico inferior del Cerro del Hierro (Zona de Ossa-Morena existen diversos tipos de mineralizaciones de barita (estratoligadas, filonianas y kársticas. La barita está acompañada de calcita, hematites, goethita, y calcopirita accesoria, y limonitas y malaquita como fases tardías de alteración, y presenta una gran pureza química [ > 98% SO4(Ba,Sr]. Existe una relación entre la tipología de la barita y el contenido en Sr, en el sentido de filonianas 34S en las baritas oscila entre 32,7 ‰ para las estratoligadas y 20,7 ‰ para las epigenéticas. Las razones 87Sr/86Sr determinadas sobre baritas epigenéticas varían entre 0.70873 y 0.71112, lo que puede interpretarse como consecuencia de la participación de diversos tipos de soluciones mineralizantes. Se propone un origen primario de las baritas estratoligadas, en relación con la diagénesis de los

  10. Pre-Hercynian hydrothermalism in South Iberia: lead isotope geochemistry constraints; Hydrothermalisme ante-hercynien en Sud-Iberie: apport de la geochimie isotopique du plomb

    Energy Technology Data Exchange (ETDEWEB)

    Marcoux, E.; Onezime, J. [Orleans Univ., Institut des Sciences de la Terre d' Orleans, 45 (France); Pascual, E. [Universite d' Huelva, Dept. de Geologia y MIneria, Huelva (Spain)

    2002-04-01

    Lead isotope study has been performed on massive sulphide deposits of Ossa-Morena and Aracena Belt (South Iberia). Results suggest the existence of at least two ancient hydrothermal events. The first one, Upper Brioverian in age ({approx}600-570 Ma), gave birth to Maria-Luisa and Puebla de la Reina massive sulphide deposits; it thus confirms the existence of a Cadomian orogen in South Iberia. Isotopic compositions indicate a local contribution of mantle-derived material (Maria Luisa mine), confirming the presence of ancient oceanic crust in Aracena Belt. This mineralizing event seems to extend till the Armorican Massif. The second episode, Eo-Hercynian in age ({approx}400-350 Ma) has allowed genesis of massive sulphide deposits of la Nava Paredon and Aguas Blancas, and could be coeval with the emplacement of South-Iberian massive sulphide ore deposits in the neighbouring South-Portuguese Zone. A more continental crustal source for later ore deposits could explain the much more important metal accumulation in this zone. (authors)

  11. A new geodynamic interpretation for the South Portuguese Zone (SW Iberia) and the Iberian Pyrite Belt genesis

    Science.gov (United States)

    Onézime, Jérôme; Charvet, Jacques; Faure, Michel; Bourdier, Jean-Louis; Chauvet, Alain

    2003-07-01

    The South Portuguese Zone (SPZ) constitutes the southernmost segment of the Variscan Iberian Massif. It is bounded to the north by the Beja-Acebuches Ophiolitic Complex and related accretionary wedge. To the south lie the Iberian Pyrite Belt (IPB) and flysch deposits forming the southern extent of the zone. Structural analysis within the Spanish side of the SPZ supports continuous south propagating deformation, evolving from early synmetamorphic thrusting in the internal zone to thin-skinned tectonics in the southern external domain. The accretion of the SPZ to the Ossa Morena Zone is also witnessed by the presence of various mélanges, observed throughout the investigated area. Part of the mélanges observed in the IPB are related to the volcanics and mineralizations setting. A key point to understand the IPB mineralizations genesis is to constrain the volcanogenic model. One underestimated feature is the large amount of submarine calc-alkaline ignimbritic facies, implying the presence of caldera structures within the province. Such correlation between caldera environment and ore deposits strongly suggests that the IPB developed in a continental arc. Our geodynamic model proposes an early north directed subduction associated with the obduction of the oceanic crust toward the south. Southward, this episode is immediately followed by the development of the accretionary prism, while farther south, a second subduction zone responsible for the arc setting of the IPB initiates. Subsequent Visean continental collision is associated with the deposit of the south propagating flysch and the present geometry of the SPZ.

  12. Progressive magmatism and evolution of the Variscan suture in southern Iberia

    Science.gov (United States)

    Braid, James A.; Murphy, J. Brendan; Quesada, Cecilio; Gladney, Evan R.; Dupuis, Nicolle

    2018-01-01

    Magmatic activity is an integral component of orogenic processes, from arc magmatism during convergence to post-collisional crustal melting. Southern Iberia exposes a Late Paleozoic suture zone within Pangea and where a crustal fragment of Laurussia (South Portuguese Zone) is juxtaposed with parautochthonous Gondwana (Ossa Morena Zone). Fault-bounded oceanic metasedimentary rocks, mélanges and ophiolite complexes characterize the suture zone and are intruded by plutonic rocks and mafic dykes. The generation and emplacement of these intrusive rocks and their relationship to development of the suture zone and the orogen are undetermined. Field evidence combined with U/Pb (zircon) geochronology reveals three main phases of plutonism, a pre-collisional unfoliated gabbroic phase emplaced at ca 354 Ma, crosscut by a syn-tectonic ca 345 Ma foliated granodiorite phase followed by a ca 335 Ma granitic phase. Geochemical analyses (major, trace, rare earth elements) indicate that the gabbro exhibits a calc-alkaline arc signature whereas the granodiorite and granite are typical of post-collisional slab break-off. Taken together, these data demonstrate a protracted development of the orogen and support a complex late stage evolution broadly similar to the tectonics of the modern eastern Mediterranean. In this scenario, the highly oblique closure of a small tract of oceanic lithosphere postdates the main collision event resulting in escape of parautochthonous and allochthonous terranes toward the re-entrant.

  13. Las estelas del Suroeste en el valle del Guadalquivir y Sierra Morena: distribución espacial y nuevas perspectivas de investigación

    OpenAIRE

    Costa Caramé, Manuel Eleazar

    2013-01-01

    This paper focuses on the spatial distribution of Late Bronze Age stelae in two geographical areas from Southwest of the Iberian Peninsula in order to test many of the hypotheses which have been proposed according to their possible functionality as territorial markers. An evaluation has been made according to the possible relation between the distribution of these monuments and some geographical and archaeological variables. The results obtained have been very useful to test some of the exist...

  14. First archeological exploration of the Roman mines of Sierra Morena: El Centenillo (Baños de la Encina, Jaén

    Directory of Open Access Journals (Sweden)

    Luis ARBOLEDAS MARTÍNEZ

    2012-03-01

    Full Text Available At the mining area of El Centenillo (Baños de la Encina, Jaén during several archaeological superficial studies and surveys a great amount of ancient fossilized miners works remains have been found inside the “socavones” (mines entrances and “rafas”. Nevertheless, the insider part of the mine has not been studied yet. Therefore, in September 2010 we decided to carry out the first archaeological exploration. The main goal of this exploration was to document and identify those ancient subterranean works in order to identify them from the most modern and contemporary that could have been still intact. This first campaign was done at the same time as the archaeological excavation of the Bronze Age site of Peñalosa. Such work has been focussed in the exploration and the examination of the ancient mining works at the double vein of Mirador-Pelaguindas as well as in the South and its respective Northern veins and the results of it can be found in this paper.

  15. Thermal effects of the Santa Eulália Plutonic Complex (southern Portugal on the meta-igneous and metasedimentary host rocks

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    Cruz, C.

    2014-12-01

    Full Text Available The Santa Eulália Plutonic Complex (SEPC is a late-Variscan granitic body located in the northern part of the Ossa Morena Zone, a inner zone of the Variscan Iberian Massif. The SEPC host rocks are composed of meta-igneous and metasedimentary units, from Upper Proterozoic to Paleozoic ages, with a NW-SE structure, cross-cut by the SEPC. The SEPC host rocks, with low grade metamorphism show well preserved primary sedimentary or igneous mineralogical, textural and structural features. The thermal effect induced by the SEPC is restricted to the roof pendants. At N and NE of the SEPC, textures and paragenesis resulting from thermal metamorphism, are not related to the SEPC intrusion but to a previous magmatism, controlled by the NW-SE regional anisotropies. The restriction of the thermal effects to the pluton roof may be caused by a combination of several interrelated factors: higher volume of granitic mass, thermal effect by advection of fluids and longer period of prevalence of high thermal conditions. The geochemical study of SEPC host rocks shows the heterogeneous character and diversity of metasedimentary, igneous and meta-igneous rocks. The whole rock geochemical data indicate that all the metasedimentary lithologies derived from an upper continental crustal source and the igneous and meta-igneous rocks show no evidence of metasomatic effects by the SEPC emplacement.El Complejo Plutónico de Santa Eulalia (CPSE es un cuerpo granítico tardi-Varisco situado en la parte norte de la Zona de Ossa Morena, en la zona interior del Macizo Ibérico Varisco. Las rocas encajantes del CPSE están compuestas por unidades meta-ígneas y metasedimentarias, de edades que van desde el Proterozoico Superior hasta el Paleozoico, con una estructura de dirección NW-SE, cortada por el CPSE. Las rocas encanjantes del CPSE, con metamorfismo de bajo grado conservan estructuras, mineralogía y textura primarias. El efecto térmicoinducido por el CPSE se limita a los

  16. Crustal seismic structure beneath Portugal and southern Galicia (Western Iberia) and the role of Variscan inheritance

    Science.gov (United States)

    Veludo, Idalina; Dias, Nuno A.; Fonseca, Paulo E.; Matias, Luís; Carrilho, Fernando; Haberland, Christian; Villaseñor, Antonio

    2017-10-01

    The crustal structure in Western Iberia, is the result of a complex geodynamic history. Most of the surface is covered by rocks dating to the Variscan orogeny, the coastal ranges dominated by Mesozoic structures and Mesocenozoic basins covering partially the mainland. In this study we present the results of a local earthquake tomographic study, performed to image in depth this complex crustal structure down to 24 km depth. The obtained tomograms present a good correlation with the surface geology, in general with higher Vp velocities in the north, and lower Vp velocities in the south. The heterogeneity observed on the surface geology of the Galicia-Tras-os-Montes Zone is well marked, being a relatively thin layer over the smoother structure of the Centro Iberia Zone CIZ. The CIZ crustal block confined between the Porto-Tomar-Ferreira do Alentejo and the Manteigas-Bragança faults having higher Vp values, enhancing the contrast to the Lusitanian Basin to the west. The Ossa-Morena Zone corresponds to the unit presenting the greater heterogeneity in both Vp and Vp/Vs models, showing also with a complex transition to the South Portuguese Zone and a relatively smooth transition to the Centro Iberian Zone. Unexpectedly, the South Portuguese Zone present an east-west velocity variation with no apparent correspondence with the surface geology. The transition to the coastal Mesocenozoic basins is clearly marked, the Lower Tagus Valley corresponding to a 4 km thick low velocity region. The relocation inland recorded seismicity in the period 2000-2014 allows cleansing some of the alignments and establish their correlation with some of the active structures in Portugal. The model features and seismicity pattern reveal the strong role played by the Variscan heritage.

  17. Crustal structure beneath Portugal from teleseismic Rayleigh Wave Ellipticity

    Science.gov (United States)

    Attanayake, Januka; Ferreira, Ana M. G.; Berbellini, Andrea; Morelli, Andrea

    2017-08-01

    Up until now, Portugal lacked a countrywide shear velocity model sampling short length-scale crustal structure, which limits interpretations of seismicity and tectonics, and predictions of strong ground motion. In turn, such interpretations and predictions are important to help mitigate risk of destruction from future large on- and offshore earthquakes similar to those that Portugal has experienced in the past (e.g. the Mw 8.5-8.7 tsunamigenic event in 1755). In this study, we measured teleseismic Rayleigh Wave Ellipticity (RWE) from 33 permanent and temporary seismic stations in Portugal with wave periods between 15 s and 60 s, and inverted it for 1-D models of shear wave velocity (Vs) structure beneath each station using a fully non-linear Monte Carlo method. Because RWE is strongly sensitive to the uppermost few kilometres of the crust, both RWE measurements and Vs models are spatially correlated with surface geology in Portugal. For instance, we find that sedimentary basins produced by rifting that had begun in the Mesozoic such as the Lusitanian Basin (LB) and the Lower Tagus-Sado Basin (LTSB) are characterised by higher RWE (lower Vs). Interestingly, we observe similar RWE (and Vs) values in the interior of the Central Iberian Zone (CIZ), which is a metamorphic belt of Paleozoic age. Together with reduced crustal thickness previously estimated for the same parts of the CIZ, this suggests that the CIZ might have experienced an episode of extension possibly simultaneous to Mesozoic rifting. The Galicia-Tras-os-Montes-Zone (GTMZ) that has undergone polyphased deformation since the Paleozoic is characterised by the lowest RWE (highest Vs) in Portugal. Ossa Morena Zone and the South Portuguese Zone exhibit intermediate Vs values when compared to that of basins and the GTMZ. Our crustal Vs model can be used to provide new insights into the tectonics, seismicity and strong ground motion in Portugal.

  18. U-Pb detrital zircon ages from the Paleozoic Marbella Conglomerate of the Malaguide Complex (Betic Cordilleras, Spain). Implications on Paleotethyan evolution

    Science.gov (United States)

    Esteban, J. J.; Cuevas, J.; Tubía, J. M.; Gutiérrez-Alonso, G.; Larionov, A.; Sergeev, S.; Hofmann, M.

    2017-10-01

    The Marbella Conglomerate (Betic Cordilleras, SW Spain) is a poorly sorted and polymictic rock of vaguely constrained Late Carboniferous age interlayered within a sandy sequence. It contains variable amounts of pebbles of quartzite, gneiss, deformed granitoid, schist, aplite, dacite and other volcanic rocks among others, which makes it a potential target for detrital zircon provenance studies. In order to decipher provenance we combined U-Pb SHRIMP and LA-ICP-MS analyses on zircons obtained from single pebbles of deformed rocks (schist, granitoids) and detrital zircons from the sandy sequence, respectively. The age spectra of the detrital zircons indicates that at least the sedimentation took place soon after the start of the Permian according to the youngest detrital zircon age (≈ 286 Ma), and it involved the denudation of terranes with rocks bearing Paleoproterozoic, Neoproterozoic, Cambro-Ordovician, Devonian and Carboniferous zircon age clusters. In contrast with the Permian age of the detrital zircons from the sandstones, igneous (ca. 532 and 516 Ma) and metamorphic (ca. 356 Ma) U-Pb SHRIMP Concordia ages were obtained from the pebbles. The different age clusters observed could be correlated to igneous, metamorphic and detrital rocks from an already eroded terrane similar to the Ossa-Morena Zone of the Iberian Variscan Belt. Therefore, we propose that most of the sedimentation of the Marbella Conglomerate took place along the western border of the Paleotethys at the north margin of Gondwana during the dismantling of the Variscan orogenic edifice and/or the Neotethys ocean opening and the birth of the Cimmerian ribbon continent.

  19. A review of the Late Cambrian (Furongian) palaeogeography in the western Mediterranean region, NW Gondwana

    Science.gov (United States)

    Álvaro, J. Javier; Ferretti, Annalisa; González-Gómez, Cristina; Serpagli, Enrico; Tortello, M. Franco; Vecoli, Marco; Vizcaïno, Daniel

    2007-11-01

    The Cambrian-Ordovician transition of the western Mediterranean region (NW Gondwana) is characterized by the record of major erosive unconformities with gaps that range from a chronostratigraphic stage to a series. The hiatii are diachronous and involved progressively younger strata along the Gondwanan margin, from SW (Morocco) to NE (Montagne Noire). They can be related to development of a multi-stage rifting (further North), currently connected to the opening of the Rheic Ocean, and concomitant erosion on southern rift shoulders. The platforms of this margin of Gondwana occupied temperate-water, mid latitudes and were dominated by siliciclastic sedimentation, while carbonate factories were only episodically active in the Montagne-Noire platform. The Upper Cambrian is devoid of significant gaps in the southern Montagne Noire and the Iberian Chains. There, the sedimentation took place in a transgressive-dominated depositional system, with common offshore deposits and clayey substrates, and was bracketed by two major regressive trends. The Late Cambrian is also associated with the record of volcanic activity ( e.g., in the Cantabrian and Ossa-Morena zones, and the northern Montagne Noire), and widespread development of a tectonic instability that led to the episodic establishment of palaeotopographies and record of slope-related facies associations. Several immigration events are recognized throughout the latest Middle Cambrian, Late Cambrian and Tremadocian. The trilobites show a stepwise replacement of Acado-Baltic-type families ( e.g., the conocoryphid-paradoxidid-solenopleurid assemblage) characterized by: (i) a late Languedocian (latest Middle Cambrian) co-occurrence of Middle Cambrian trilobite families with the first anomocarid, dorypygid and proasaphiscid invaders; (ii) a Late Cambrian immigration replacing previous faunas, composed of trilobites (aphelaspidids, catillicephalids, ceratopygids, damesellids, eulomids, idahoiids, linchakephalids, lisariids

  20. Crustal structure and composition to the S of the Spanish Central System: Effect of Alpine reactivation in an internal Variscan domain

    Science.gov (United States)

    Ayarza, Puy; Carbonell, Ramón; Ehsan, Siddique; Martí, David; Palomeras, Immaculada; Martínez Poyatos, David

    2016-04-01

    The ALCUDIA Project has acquired vertical incidence and wide-angle reflection seismic data in the Variscan Central Iberian Zone of Spain. The NE-SW, ~300 km long profiles sample an area going from the suture between the Variscan Central Iberian and the Ossa-Morena Zones in the S to the boundary between the former and the Alpine Central System to the N. Although crustal thickness appears to be fairly constant along most of the Central Iberian Zone, a gradual increase of 3-5 km in the northern half of the profile is clearly imaged by the wide-angle data. This increase in the Moho depth is accompanied by a decrease in the thickness of the layered lower crust from the Toledo Anatectic Complex to the N. Right in this area, the amount of Variscan metasediments diminish and the surface geology is characterized by granites, migmatites and by the Madrid Basin, a foreland basin of the Alpine Central System that is part of the bigger Tagus Basin. The increase in crustal thickness identified in the neighborhood of the Central System is also accompanied by a slight increase in the Poisson ratio values, which even though still below 0.25, they are higher than those observed in the southern part of the profile, far from the influence of the late Variscan melting episode and of that of the Alpine tectonics. Two scenarios are considered to take part in the Moho deepening near the Central System: Firstly, the Alpine reactivation causing this mountain belt has increased the crustal load giving rise to a foreland basin and a moderate crustal thickening. Also, a gradual change in crustal composition to the N, incorporating denser and more basic rocks, might also play a role in the average crustal density and contribute to Moho deepening by isostatic readjustment. The importance of each of these process is, as yet, unknown. However, the next acquisition of the CIMDEF project wide-angle reflection dataset across the central part of the Iberian Peninsula, crossing the Central System, will

  1. Ceftriaxone susceptibility of oxacillin-susceptible Staphylococcus aureus from patients with prosthetic joint infection.

    Science.gov (United States)

    Greenwood-Quaintance, Kerryl E; Kohner, Peggy; Osmon, Douglas R; Virk, Abinash; Patel, Robin

    2015-06-01

    Ceftriaxone is used to treat oxacillin-susceptible S. aureus (OSSA) prosthetic joint infection (PJI). Susceptibility of ceftriaxone against OSSA has been questioned. Ceftriaxone susceptibility was determined against 100 PJI OSSA isolates. Ceftriaxone MIC90/MIC50 were 8/4 and 4/3μg/mL by broth microdilution and Etest, respectively. Ceftriaxone susceptibility is inferable by oxacillin susceptibility. Copyright © 2015 Elsevier Inc. All rights reserved.

  2. The Effect of Spatial Interference Correlation and Jamming on Secrecy in Cellular Networks

    KAUST Repository

    Ali, Konpal S.

    2017-06-02

    Recent studies on secure wireless communication have shed light on a scenario where interference has a desirable impact on network performance. Particularly, assuming independent interference-power fluctuations at the eavesdropper and the receiver, opportunistic secure-information transfer can occur on the legitimate-link. However, interference is spatially correlated due to the common set of interfering sources, which may diminish the opportunistic-secure-spectrum-access (OSSA) probability. We study and quantify the effect of spatial interference correlation on OSSA in cellular-networks and investigate the potential of full-duplex jamming (FDJ) solutions. The results highlight the scenarios where FDJ improves OSSA performance.

  3. Correlation between the Palaeozoic structures from West Iberian and Grand Banks margins using inversion of magnetic anomalies

    Science.gov (United States)

    Silva, Elsa A.; Miranda, J. M.; Luis, J. F.; Galdeano, A.

    2000-05-01

    Verhoef [Srivastava, S.P., Verhoef, J., 1992. Evolution of Mesozoic sedimentary basins around the North Central Atlantic: a preliminary plate kinematic solution. In: Parnell, J. (Ed.), Basins on the Atlantic Seaboard: Petroleum Geology Sedimentology and Basin Evolution, Geological Society Special Publication No. 62, pp. 397-420] pole. Using this coherent magnetic framework, we can verify that the continuity between adjacent blocks is quite good, in terms of the amplitude, wavenumber and magnetic susceptibility pattern. If we accept that the magnetic properties can be taken as a marker of the hercynian zonation, as was verified in previous studies (Miranda, J.M., Galdeano, A., Rossignol, J.C., Mendes-Victor, L.A., 1989. Aeromagnetic anomalies in mainland Portugal and their tectonic implications. Earth Planet. Sci. Lett. 95, 161-177; Galdeano, A., Miranda, J.M., Matte, P., Mouge, P., Rossignol, C., 1990. Aeromagnetic data: A tool for studying the Variscan arc of Western Europe and its correlation with transatlantic structures. Tectonophysics 177, 293-305; Socias, I., 1994. Estudios de los Elementos del Campo Magnético en la España Peninsular a partir de Datos Aeromagmanéticos. Ph.D. thesis, University of Madrid), we can conclude that (1) the characteristic magnetic signature of Ossa Morena Zone is absent on the Iberian Margin and west of it; (2) no eastward continuation of the Collector Anomaly is found in Iberia; (3) only the inner zones of the Variscan Belt can be followed towards NW France; (4) there is a major (left lateral ?) strike-slip fault along the northern Portuguese shoreline that cuts the IAA and significantly displaces the once-contiguous variscan units.

  4. Using multifractal modeling as a standard tool in geochemical exploration for predicting mineralized areas

    Science.gov (United States)

    Gonçalves, Mario A.

    2015-04-01

    scattered geochemical data sets that have been accumulating for decades of mining exploration in Southern Portugal. The studied zones include: the tectonic controlled quartz-vein Au-Sb mineralizations, the gabbroic and ultramafic complex of the southern border of the Ossa-Morena Zone, and the rocks belonging to the World-class massive sulfide province, the Iberian Pyrite Belt (IPB). The methodology used the CA method but also variogram analysis and modelling to outline and classify different sets of mineral deposits before confirmation in the field. This diversity of geologic contexts serves to show how effective and powerful the CA method can be, since it not only enhances already known mineralizations, it allowed the screening and identification of several new mineralized spots that have been previously overlooked. This has been of particularly economic importance because a major re-analysis of data and new exploration campaigns are currently under way for the next years in the IPB, with the potential for opening a new paradigm in the exploration for massive sulfide deposits in the region. Cheng et al, 1994, J. Geochem. Explor., 51, 109.

  5. From the Atlas to the Variscan Core of Iberia: Progress on the Knowledge of Mantle Anisotropy from SKS Splitting

    Science.gov (United States)

    Diaz Cusi, J.; Grevemeyer, I.; Thomas, C.; Harnafi, M.

    2012-12-01

    . The short period of registration and the intrinsic problems related to noise and instrument stability in the seafloor has not allowed getting a large database of anisotropic measurements. However, the few events providing good quality SKS measurements show interesting results which may provide significant clues to the knowledge of the geodynamic evolution of this area. Beneath Iberia, the second Iberarray deployment encompasses mainly the Variscan units of the Central Iberian Massif. The results show a small amount of anisotropy and suggest complex anisotropy features, confirming what has been observed in the first deployment. A significant change in both FPD and delay times across the two main units of the Variscan domain, the Ossa-Morena and the Central Iberian zones seem to exist. Permanent stations in southern Portugal show a significant number of null measurements, similar to what has previously discussed for the High Atlas stations. Beneath Eastern Iberia, the FPD have a roughly E-W orientation. No significant changes are observed between the anisotropic parameters beneath the Balearic Islands and those in the Eastern Betics.

  6. Constraints on strain rate and fabric partitioning in ductilely deformed black quartzites (Badajoz-Córdoba Shear Zone, Iberian Massif)

    Science.gov (United States)

    Puelles, Pablo; Ábalos, Benito; Fernández-Armas, Sergio

    2013-04-01

    The Badajoz-Córdoba Shear Zone is a is 30-40 km wide and 400 km long, NW-SE trending structure located at the boundary between the Ossa-Morena and Central-Iberian Zones of the Iberian Massif. Two elongated domains can be differentiated inside: the Obejo-Valsequillo domain to the NE and the Ductile Shear Belt (DSB) to the SW. The former exhibits Precambrian to Cambrian volcano-sedimentary rocks unconformably overlaying a Neoproterozoic basement formed by the "Serie Negra". The latter, 5-15 km wide, is composed mainly of metamorphic tectonites including the "Serie Negra" and other units located structurally under it. The petrofabric of "Serie Negra" black quartzites from the DSB is analyzed in this study with the Electron Back-Scattered Diffraction technique (EBSD). Black quartzites represent originally siliceous, chemical-biochemical shallow-water marine deposits, currently composed almost exclusively of quartz and graphite. Macroscopically they exhibit an outstanding planolinear tectonic fabric. Petrographically, coarse- and fine-grained dynamically recrystallized quartz bands alternate. The former contain quartz grains with irregular shapes, mica inclusions and "pinning" grain boundaries. Oriented mica grains and graphite particles constrain irregular quartz grain shapes. Quartz ribbons with chessboard microstructures also occur, indicating recrystallization under elevated temperatures coeval with extreme stretching. Fine-grained recrystallized quartz bands are dominated by quartz grains with straight boundaries, triple junctions, a scarcer evidence of bulging, and a higher concentration of dispersed, minute graphite grains. Quartz lattice-preferred orientation (LPO) patterns permit to identify two well-developed maxima for [c] axes: one close to the Y structural direction and the other one around Z, and -axes girdles normal to Y and Z. Although both [c] axis maxima appear in the coarse- and fine-grained bands, subsets can be isolated with grain cluster

  7. Essential oil content and composition, nutrient and mycorrhizal status of some aromatic and medicinal plants of northern Greece.

    Science.gov (United States)

    Karagiannidis, Nikitas; Panou-Filotheou, Hellen; Lazari, Diamando; Ipsilantis, Ioannis; Karagiannidou, Christina

    2010-05-01

    A field survey was conducted in three northern Greek mountain areas (Chortiatis, Ossa, and Pieria) to investigate the mycorrhizal and nutritional status, and the essential oil content and composition of common medicinal and aromatic plants. A range of values for nutrient status and essential oil contents and composition was established. All plants were found to be mycorrhizal, including Achillea coarctata Poir., Micromeria juliana (L.) Bentham ex Reichenb., and Salvia sclarea L.;. these three are reported as being mycorrhizal for the first time. Arbuscular mycorrhizal fungal root colonization was highest in Pieria, exceeding 80% for all 15 plants sampled, and lower in Chortiatis and Ossa.

  8. Reference: 650 [Arabidopsis Phenome Database[Archive

    Lifescience Database Archive (English)

    Full Text Available 650 http://metadb.riken.jp/db/SciNetS_ria224i/cria224u4ria224u17711414i Scebba France...nal Andreucci Andrea|Bernacchia Giovanni|De Bastiani Morena|Galli Alvaro|Pitto Letizia|Scebba Francesca

  9. (Un)liveabilities: Homonationalism and transnational adoption

    DEFF Research Database (Denmark)

    Petersen, Michael Nebeling; Myong, Lene

    2015-01-01

    Rosa Morena tells a story about kinship in which a white homosexual Danish man adopts a child born to a black poor Brazilian woman. Using a theoretical framework of biopolitics and affective labour the article highlights how the male homosexual figure is being cast as heteronormative and white...

  10. Regional anaesthesia for cleft lip surgery in a developing world setting

    African Journals Online (AJOL)

    Method. A retrospective chart review of 100 patients aged >14 years who had cleft lip surgery during an Operation Smile South Africa (OSSA) volunteer surgical programme in Madagascar during 2007 and 2008. The nerve blocks used included a bilateral infraorbital nerve block, a dorsalnasal nerve block and a septal block ...

  11. Comportamiento mecánico del poliestireno expandido (EPS) bajo carga de compresión /

    OpenAIRE

    Ossa López, Alexandra sustentante.

    2009-01-01

     tesis que para obtener el grado de Doctor en Ingeniería Civil, presenta Alexandra Ossa López ; asesor Miguel Pedro Romo Organista. vii, 79 páginas : ilustraciones. Doctorado en Ingeniería Civil UNAM, Instituto de Ingeniería, 2009

  12. Untitled

    Indian Academy of Sciences (India)

    Program. OSSA/NASA, Pacific Southwest For, and Range Expt. Sta. Forest service, USDA. Lapietra G & Megeir J 1976 Proc. Symp. IUFRO, Subj ... Meyer M P & French D W 1966 Photogramm, Eng. 32.812. Miller R L & Choate G A 1964 The forest resource of Colorado, USDA For. Ser. Rocky Mountain For, and. Range Expt.

  13. Trace Elements Concentrations in Water and Aquatic Biota from Ase ...

    African Journals Online (AJOL)

    MICHAEL HORSFALL

    www.bioline.org.br/ja. Trace Elements Concentrations in Water and Aquatic Biota from Ase Creek in Niger. Delta. OVERAH, C L; *IWEGBUE, C M A; OSSA, E K; NWAJEI, G E. Department of Chemistry, Delta State University, Abraka, Nigeria. ABSTRACT: Water, Tilapia zilli, Synodontis nigrita, Clarias angillaris, Ipomoe cearri ...

  14. DEVELOPMENT AND GLOBAL GOVERNANCE

    International Development Research Centre (IDRC) Digital Library (Canada)

    1995-05-02

    May 2, 1995 ... Mr. Ossa has written on exchange rate policies, export diversification, industrial development and external debt of developing countries. ...... I think most people would agree that the World Bank, for example, should not only finance governments but should directly finance the private sector in developing ...

  15. Petrology and lithogeochemistry of the mineralized tanzanite ...

    African Journals Online (AJOL)

    Evidence from metamorphosed graded bedding confirms the existence of the antiform and also shows that the macroscopic F2 folds are superimposed on a previously inverted stratigraphic succession. This inversion is the consequence of D1 deformation. The polyphase nature of these rocks with which pegmatites and ...

  16. Orogeny, migmatites and leucogranites: A review

    Indian Academy of Sciences (India)

    R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

    the role of mantle-derived magma in the thermal evolution of these belts is not well constrained. A combination of these processes strongly perturbs the geothermal gradient by displacing isotherms toward the surface, creating a thermal antiform with a near-isothermal core (Royden 1993; Thomp- son et al. 1997; Huerta et al.

  17. Explotación de peces asociada a la pesquería artesanal de langosta de Juan Fernández (Jasus frontalis

    Directory of Open Access Journals (Sweden)

    Mauricio Ahumada

    2014-03-01

    Full Text Available Para contribuir al conocimiento de la explotación de peces asociada a la pesquería de langosta de Juan Fernández, se monitorearon 157 salidas de pesca durante la temporada 2010-2011. Se capturaron 10.462 ejemplares correspondientes a 19 especies de peces, tres de las cuales concentraron el 94% de la captura en número: jurel de Juan Fernández (Pseudocaranx chilensis (45%, breca (Nemadactylus gayi (41% y anguila morena (Gymnothoraxporphyreus (8%. Las capturas totales estimadas fueron 40, 24 y 13 ton de breca, jurel de Juan Fernández y anguila morena, respectivamente. El 97% de los ejemplares de peces capturados fueron utilizados como carnada de peces o langosta.

  18. Cloisonné kidney in mouflon sheep (Ovis orientalis musimon)

    OpenAIRE

    Hervás, J.; Chacón-M. de Lara, F.; Azorit, C.

    2002-01-01

    This study describes a case of cloisonné kidney associated with infection by Babesia ovis in a wild mouflon (Ovis orientalis musimonj found dead in year in eastern Sierra Morena (Andalusia, Spain). The major macroscopic lesions were a) icteric coloration in ocular and oral mucosa, and b) dark metal coloration on the kidneys' external surface. Intense dark coloration alternating with intense greyish strips was observed on renal cortex sections. Blood samples were collected for haematological a...

  19. Cloisonné kidney in mouflon sheep (Ovis orientalis musimon)

    OpenAIRE

    Hervás, J.; Chacón-M. de Lara, F.; Azorit, C.

    2002-01-01

    This study describes a case of cloisonné kidney associated with infection by Babesia ovis in a wild mouflon (Ovis orientalis musimonj found dead in year in eastern Sierra Morena (Andalusia, Spain). The major macroscopic lesions were a) icteric coloration in ocular and oral mucosa, and b) dark metal coloration on the kidneys' external surface. Intense dark coloration alternating with intense greyish strips was observed on renal cortex sections. Blood sampl...

  20. (U)levelige slægtskaber

    DEFF Research Database (Denmark)

    Petersen, Michael Nebeling; Myong, Lene

    2012-01-01

    The Danish movie Rosa Morena (2010) tells an unusual story about kinship in which a white homosexual Danish man adopts a child born to a poor black Brazilian woman. Using a theoretical framework of biopolitics and affective labour the article highlights how the male homosexual figure is being cast....... In the same instance as the adoption, a white male homosexual population unfolds into life, and it targets a racialized and poor population as if already dead....

  1. Joyería: Poemas

    Directory of Open Access Journals (Sweden)

    Juan Lozano y Lozano

    1973-05-01

    Full Text Available El documento presenta los poemas "Emoción otoñal", "Un recuerdo", "Ante la estatua de Shelley, en Oxford", "Optimismo", "Ventura inmortal", "Morena", "Retrato de niña", "La muerte de Luis Tejada", "La catedral de Colonia", "A una gran dama", "Amanecer", "Farewell", "El vuelo", "Exhortación", "Madre", "En la Muerte del General Herrera", "A bordo", "Emoción Primaveral".

  2. Characterization of maturity and quality of Brazilian apirenic grapes in the São Francisco river Valley

    Directory of Open Access Journals (Sweden)

    Robson de Jesus Mascarenhas

    2012-03-01

    Full Text Available The objective of this study was to characterize and correlate maturity and quality of the first varieties of Brazilian seedless grapes 'BRS Clara', 'BRS Linda', 'BRS Morena', and 'Advanced Selection 8' compared with the American variety 'Crimson Seedless' in compliance with the Brazilian Normative/2002 and export standards Advanced Selection 8' is dark reddish, has large clusters, and is a very large ellipsoid berry; 'BRS Morena' is black with medium sized clusters and large berry shaped as ellipsoid to globoid; 'BRS Linda' is light green and has large sized clusters; 'Crimson' is pink and has small clusters with berries varying from medium to large sizes and ellipsoid shaped; and 'BRS Clara' is green yellowish has medium sized clusters and small berry of elongated ellipsoid shape. All varieties evaluated meet the standard for domestic market established as berry size minimum diameter 12 mm. 'BRS Clara' does not meet the export requirements of diameter. Berries of the red grapes 'BRS Morena' and 'Crimson Seedless' are firmer. The pH, titratable acidity, and soluble solids meet the official standards. Larger clusters are less acidic and present higher soluble solids/titratable acidity ratios implying that they are the sweetest type when ripe.

  3. Un viaje entre la historia y la memoria: los “ossa” jujeños

    Directory of Open Access Journals (Sweden)

    Sánchez, Sandra Patricia

    2003-06-01

    Full Text Available This article presents the results of research on the Indians known in hispanic manuscripts and archival documents as Ossa or Osas. At the time of the effective occupation of the argentine northwest, this small group was located in a valley east of the Humahuaca Canyon along with other population groups self-identified as the Ocloya, the Paypaya and the Churumata. The article seeks to portray, on the basis of the greatest possible number of historical sources, the events which followed the concession of these Indians in encomienda or repartimiento, and the implications for them in terms of displacement and the other changes experienced. The aim is to describe the process of ethnic disintegration which the Ossa Indians underwent as a result of the establishment and consolidation of the colonial system in Jujuy.

    El artículo presenta los resultados de la investigación sobre los denominados indios ossa u osas en los escritos españoles. Un “pequeño grupo” que, al momento de la ocupación efectiva del Noroeste argentino, se encontraba asentado en un valle al este de la Quebrada de Humahuaca en compañía de otros conjuntos de poblaciones autoidentificadas como los ocloya, los paypaya y los churumata.

    Vamos a intentar historiar lo más documentadamente posible qué sucedió a partir de la concesión en encomienda y repartimiento de estos indios y sus implicancias en relación a los movimientos, traslados y cambios que sufrieron. Es decir, describir el proceso de disolución étnica que vivieron los ossa al compás de la creación y consolidación del sistema colonial en Jujuy.

  4. Oma kodus kontvõõraks / Kajar Lember

    Index Scriptorium Estoniae

    Lember, Kajar, 1976-

    2007-01-01

    Ilmunud ka: Vali Uudised, 26. okt. 2007, lk. 2; Sakala, 26. okt. 2007, lk. 2; Põhjarannik, 26. okt. 2007, lk. 2; Võrumaa Teataja, 27. okt. 2007, lk. 2; Meie Maa, 29. okt. 2007, lk. 2; Severnoje Poberezhje, 31. okt. 2007, lk. 2; Koit, 1. nov. 2007, lk. 6; Oma Saar, 8. nov. 2007, lk. 5. Autor leiab, et kohalikud omavalitsused on uues riigieelarves jäetud vaeselapse ossa

  5. Interpretation of Overly Open Advertising Texts in Print Media

    OpenAIRE

    CHEN, YUCHI

    2011-01-01

    The advertising texts of print media is one of the important manner to communicate the marketing messages with consumers. Under the post modern era, the form of advertising texts has been influenced by the reading habit of readers. Overly open advertising texts which is anti-formed, irrational appealing, image centred and ambiguous, is popular for marketers to transmitting their product and brand information. However, whether the overly open advertising texts is interpreted by consumers, to w...

  6. Possible giant metamorphic core complex at the center of Artemis Corona, Venus

    Science.gov (United States)

    Spencer, J.E.

    2001-01-01

    Hundreds of circular features on Venus known as coronae are characterized by annular fractures and commonly associated radial fractures and lava flows. Coronae are thought to have been produced by buoyant mantle diapirs that flatten and spread at the base of the lithosphere and cause fracturing, uplift, and magmatism. The interior of Artemis Corona, by far the largest corona at 2100 km diameter, is divided in half by a northeast-trending deformation belt that contains numerous rounded ridges resembling antiforms. The largest of these ridges, located at the center of Artemis Corona, is ???5 km high on its steep northwest flank where it is adjacent to a flat-bottomed, 10-km-wide trough interpreted as a rift valley. The 280-km-long antiformal ridge is marked by perpendicular grooves that cross the ???50-km-wide ridge and extend southeastward as far as 120 km across adjacent plains. The grooves abruptly terminate northwestward at the rift trough. The large antiformal ridge terminates southwestward at a transform shear zone that parallels the grooves. These features-rift valley, antiformal uplift, grooves, and transform shear zone-are morphologically and geometrically similar to grooved, elevated, submarine metamorphic core complexes on the inside corners of ridge-transform intersections of slow-spreading ridges on Earth. As with submarine core complexes, the grooved surface on Venus is interpreted as the footwall of a large-displacement normal fault, and the grooves are inferred to be the product of plastic molding of the footwall to irregularities on the underside of the hanging wall followed by tectonic exhumation of the molded grooves and conveyer-belt-like transport up and over the large antiform and across the southeastern plains. According to this interpretation, the trend of the grooves records the direction of extension, which is perpendicular to the thrusts at the leading edge of the annular thrust belt 1000 km to the southeast. Both may have formed at the

  7. Possible origin and significance of extension-parallel drainages in Arizona's metamophic core complexes

    Science.gov (United States)

    Spencer, J.E.

    2000-01-01

    The corrugated form of the Harcuvar, South Mountains, and Catalina metamorphic core complexes in Arizona reflects the shape of the middle Tertiary extensional detachment fault that projects over each complex. Corrugation axes are approximately parallel to the fault-displacement direction and to the footwall mylonitic lineation. The core complexes are locally incised by enigmatic, linear drainages that parallel corrugation axes and the inferred extension direction and are especially conspicuous on the crests of antiformal corrugations. These drainages have been attributed to erosional incision on a freshly denuded, planar, inclined fault ramp followed by folding that elevated and preserved some drainages on the crests of rising antiforms. According to this hypothesis, corrugations were produced by folding after subacrial exposure of detachment-fault foot-walls. An alternative hypothesis, proposed here, is as follows. In a setting where preexisting drainages cross an active normal fault, each fault-slip event will cut each drainage into two segments separated by a freshly denuded fault ramp. The upper and lower drainage segments will remain hydraulically linked after each fault-slip event if the drainage in the hanging-wall block is incised, even if the stream is on the flank of an antiformal corrugation and there is a large component of strike-slip fault movement. Maintenance of hydraulic linkage during sequential fault-slip events will guide the lengthening stream down the fault ramp as the ramp is uncovered, and stream incision will form a progressively lengthening, extension-parallel, linear drainage segment. This mechanism for linear drainage genesis is compatible with corrugations as original irregularities of the detachment fault, and does not require folding after early to middle Miocene footwall exhumations. This is desirable because many drainages are incised into nonmylonitic crystalline footwall rocks that were probably not folded under low

  8. Pastores en el 'Quijote'

    Directory of Open Access Journals (Sweden)

    Francisco López Estrada

    2005-12-01

    Full Text Available Alonso Quijano become to be don Quixote, when the reading of some books of knight-errantry makes him mad. But don Alonso reads also pastoral literature. Sancho confess the was a rustician shepherd. Dulcinea is a name nearly to the pastoral literature. Don Quixote pronounces a pastoral lecture, adressed to others shepherds. In Sierra Morena, during the Grisóstomo's funeral, Marcela enunciate & discourse in favor of love liberty. Don Quixote attends to Camacho's wedding and he intervenes in the facts of this act. Finally, Don Quixote regains his mind, and he dies like a christianman being Alonso Quijano.

  9. Aportaciones a la caracterización de las razas bovinas autóctonas de Galicia en peligro de extinción

    OpenAIRE

    Rivero Martínez, Cástor José

    2016-01-01

    Aportaciones a la caracterización de las razas bovinas autóctonas de Galicia en peligro de extinción comienza realizando un recorrido por el origen y la historia de las cinco razas incluidas actualmente bajo la denominación de Morenas Gallegas: Cachena, Caldelá, Frieiresa, Limiá y Vianesa, para a continuación describir la situación en la que se encontraban cuando la Xunta de Galicia puso en marcha un Programa de Conservación y Recuperación con el fin de evitar su desaparición. A continuaci...

  10. Estudio y seguimiento de la fauna Orthoptera de un entorno natural sometido a un programa de restauración ecológica en el sur de la Península Ibérica

    OpenAIRE

    Moyano Ayala, Lourdes

    2014-01-01

    La presente Memoria de Tesis se enmarca dentro del conjunto de medidas de mejora ambiental asociadas a la construcción del embalse de la Breña II (Córdoba) que tienen por objeto subsanar el impacto negativo ocasionado mediante una serie de actuaciones que propicien la conservación del patrimonio natural del entorno de Sierra Morena Central (sur de la Península Ibérica). El estudio se centra en uno de los grupos de insectos más característicos y mejor representados en la zona: los Ortópteros. ...

  11. Los paisajes agrarios

    OpenAIRE

    Naranjo-Ramírez, J.

    1994-01-01

    Teniendo como punto de partida el Catastro de Ensenada (s. XVIII), se reconstruyen los rasgos de los paisajes agrarios presentes en el término municipal de la ciudad de Córdoba, a saber: Paisajes agrarios de Sierra Morena, del Valle del Guadalquivir y de la Campiña miocena La difícil síntesis nos habla de un paisaje de dehesa, matorral y arbolado (paisaje cinegético-forestal), estructurado en “latifundios de sierra”, en la mitad septentrional; de un paisaje de Vega, con el regadío como pro...

  12. Enseñanza de la segunda ley de Newton a través de un objeto virtual de aprendizaje

    OpenAIRE

    Vargas Contreras, Diana Marcela

    2011-01-01

    Los conceptos relacionados con la segunda ley de Newton son fundamentales para la comprensión de la dinámica de los cuerpos y hacen parte de las competencias que debe fortalecer el estudiante según los estándares del MEN; frente a dichos conceptos, los estudiantes de grado décimo de la IED Sierra Morena ubicada en la localidad 19 de Bogotá, presentan dificultades que requieren la creación de una estrategia complementaria al trabajo de aula, enmarcada en el aprendizaje activo y significativo d...

  13. A risk assessment model for pipelines exposed to geohazards

    Energy Technology Data Exchange (ETDEWEB)

    Esford, F; Porter, M.; Savigny, K.W. [BGC Engineering Inc., Vancouver, BC (Canada); Muhlbauer, W.K. [WKM Consultancy, Swindon (United Kingdom); Dunlop, C. [Transredes (Bolivia)

    2004-07-01

    The challenges facing Trans porte de Hidrocarburos Sociedad Anonima (Transredes) in maintaining and protecting its aging pipeline infrastructure were discussed. Transredes currently operates 2,744 km of liquids pipelines and 2,920 km of gas pipelines in Bolivia, across terrain that is subject to earthquakes, floods and landslides. The 4 to 36 inch inch diameter pipelines are 40 to 50 years old. A quantitative risk assessment procedure was developed to rank the threats to the pipelines and identify locations facing the highest level of risk. The purpose was to prioritize capital and maintenance activities based on risk management principles. The pilot study customized the risk assessment procedures to address the OSSA-1 pipeline's elevated exposure to geohazards. It was shown that the probability of geohazard-related pipeline failure is very site specific and can vary over several orders of magnitude. Twelve sites received high annual probability of failure estimates due to geohazards. These were among the highest ratings along the pipeline due to any hazard type. Although other hazard types also showed high probability of failure scores, many were related to information gaps or uncertainties in the condition of the pipeline. The following 3 initiatives have been identified for the initial OSSA-1 risk mitigation plan: geohazard mitigation; pipe strength uncertainty resolution; and, general uncertainty reduction. Transredes is using the information from this risk assessment to set capital and maintenance budgets and to develop programs to improve the operational safety of the OSSA-1 pipeline. 14 refs., 1 tab., 7 figs.

  14. X-ray appearances of repair changes in case of extra- articular fractures of long bones in children and adolescents

    International Nuclear Information System (INIS)

    Radchenko, D.P.

    1987-01-01

    On the basis of clinical-roentgenologic examination (for the period from 1 week to 6 years) of 41 patients with metaphysis fracture and 59 patients with diaphysis fracture (patients aged from 1.5 to 15 years) peculiarities of repair process with different fracture localization and depending on the treatment are pointed out. X-ray signs of bony symphysis are indicated. Decisive effect of the quality of ossa fragment fixation on the time of consolidation of metaphyses and long bone diaphysis is stated

  15. Internationality meets locality - ART IST KUKU NU UT festival in Tartu / Tanel Rander

    Index Scriptorium Estoniae

    Rander, Tanel, 1980-

    2012-01-01

    Kunstifestivalist ART IST KUKU NU UT. Näitusest "Möh? Fui! Öäk! Ossa! Vau! Eesti kaasaegse kunsti klassika" (06.09.-18.11.2012) Tartu Kunstimuuseumis. Festivali projektijuht Kaisa Eiche, kunstiline juht ja näituse kuraator Rael Artel. Näitusel osalesid Jaan Toomik, Raul Meel, Kai Kaljo, Johnson & Johnson, Anna-Stina Treumund ja Flo Kasearu. Chris Fitzpatrick'u kureeritud näitusest "Sõida tasa üle silla" (07.-30.09.2012) galeriis Noorus. Kuku Nunnu stipendiaadi Eike Epliku isikunäitusest "Tüdruk, kes kõike arnastas" (07.09.-28.10.2012) Y-galeriis

  16. Beyond Big

    DEFF Research Database (Denmark)

    Smith, Shelley

    2003-01-01

    . The summation of these preliminary chapters uncovers a situation in which the descriptive vocabulary used to characterise the spatial and perceptual aspects of contemporary space is based on both negation and excess. Terms such as 'underspatialisation', 'non-place', 'anti-form' and even the 'concept...... of the sublime', examined in the thesis as a potential descriptive tool, address large scale contemporary space from a negative position – a position from which it is hard to find words. In an attempt to find words, the analysis object of large scale contemporary space is further specified in the final chapter...

  17. Intra-Continental Deformation by Mid-Crustal Shearing and Doming in a Cenozoic Compressive Setting Along the Ailao Shan-Red River Shear Zone

    Science.gov (United States)

    Zhang, B.

    2016-12-01

    Large-scale lateral strike-slip shear zones have been a key point in the debate about the deformation mechanisms of Asia in response to the India-Asia collision. The exhumed gneiss has been attributed to lateral strike-slip shear zone. This hypothesis has been challenged by recent discoveries indicating that a contractional doming deformation prior to the initiation of lateral strike-slip shearing. The Cenozoic Xuelong Shan antiformal dome is located at the northern segment of the Ailao Shan-Red River shear zone. Subhorizontal foliation in the gneiss core are recognized, representing a broad top-to-NE shear initiated under amphibolite facies conditions and propagated into greenschist facies in the mantling schist and strike-slip shear zone. Quartz CPOs and opening angles of crossed girdle fabrics in quartz suggest that the deformation temperatures increased with increasing structural depth from 300-500 °C in the mantling schist to ≥650 °C in the gneissic core. This trend is mirrored by variations in the metamorphic grade of the syn-kinematic mineral assemblages and microstructures, which ranges from garnet + amphibole + biotite + sillimanite + rutite + feldspar in the core to garnet + staurolite + biotite + epidote + muscovite within the limb units. Five-stage deformation is identified: (1) a broad top-to-NE shear in the subhorizontal level (D1); (2) opposing reverse-sense shear along the two schist limbs of the dome during contraction-related doming (D2-D3); (3) sinistral strike-slip shearing within the eastern limb (D4); and (4) extensional deformation (D5). The antiformal dome formation had been roughly coeval with top-to-NE ductile shearing in the mid-crust at 32 Ma or earlier. The geometries of the antiformal dome in the Xuelong Shan dome are similar to those associated with the antiform in the Dai Nui Con Voi, Diancang Shan and Ailao Shan zones. It is likely that the complex massifs, which define a regional linear gneiss dome zone in Cenozoic intra

  18. Aportación de la Arqueoantropología a la interpretación de la dinámica sepulcral de las tumbas megalíticas de Cameros (La Rioja, España

    Directory of Open Access Journals (Sweden)

    Fernández-Crespo, Teresa

    2015-12-01

    Full Text Available We attempt to reconstruct the Neolithic and Chalcolithic funerary use of the main megalithic monuments from Cameros (La Rioja: Peña Guerra II, Collado del Mallo, Fuente Morena and Collado Palomero I. The record is analysed through a combination both of diverse archaeoanthropological parameters (osteological profile, anatomical connection, bone refitting, taphonomic alterations, bone handling and of field data. The results suggest a complex reality where primary inhumations predominate, but where spatial arrangements (nests of skulls and bundles of long bones and perhaps some isolated bone removal also occurred. Secondary depositions, whether in the form of cremation or not, may also have played a role.Se intentan reconstruir los modos de uso funerario neolíticos y calcolíticos de los principales megalitos de Cameros (La Rioja: Peña Guerra II, Collado del Mallo, Fuente Morena y Collado Palomero I. El análisis del registro combina los diversos parámetros arqueoantropológicos (perfiles osteológicos, conexiones anatómicas, remontajes, alteraciones tafonómicas, manipulaciones con los datos de campo. Los resultados muestran una realidad compleja donde la inhumación primaria parece predominante, acompañada de labores de reacomodo (nidos de cráneos, haces de huesos y tal vez de ciertas limpiezas puntuales. No obstante, las deposiciones secundarias, en forma o no de cremaciones, pudieron desempeñar también un papel relevante.

  19. New material and revision of Melanorosaurus thabanensis, a basal sauropodomorph from the Upper Triassic of Lesotho

    Directory of Open Access Journals (Sweden)

    Claire Peyre de Fabrègues

    2016-02-01

    Full Text Available Melanorosaurus is a genus of basal sauropodomorph that currently includes two species from Southern Africa. In this paper, we redescribe the holotype femur of Melanorosaurus thabanensis from the Elliot Formation of Lesotho, as well as associated remains. The stratigraphic position of this taxon is reviewed, and it is clear that it comes from the Lower Elliot Formation being, therefore, Late Triassic in age, and not Early Jurassic as originally described. The knowledge of the anatomy of the basal sauropodomorph of Thabana Morena is enhanced by the description of six new skeletal elements from the type locality. The femur and the ilium from Thabana Morena are diagnostic and characterized by unusual proportions. The first phylogenetic analysis including both this specimen and Melanorosaurus is conducted. This analysis leads to the conclusion that the femur described in the original publication of Melanorosaurus thabanensis can no longer be referred to Melanorosaurus. For these reasons, we hereby create Meroktenos gen. nov. to encompass Meroktenos thabanensis comb. nov.

  20. TESIS DOCTORALES Doctoral dissertations

    Directory of Open Access Journals (Sweden)

    Esteban Hernández Esteve

    2006-12-01

    Full Text Available Juan Baños Sánchez-Matamoros:Discurso, poder y contabilidad: Un Análisis Foucaultiano en el caso de las Nuevas Poblaciones de Sierra Morena y Andalucía (1767- 1772 Discourse, Power and Accounting: A Foucaultian Analysis in the Case of the New Settlements in Sierra Morena and Andalusia (1767-1772 Juan Luis Lillo Criado: Personas, técnicas y cambios contables en la Santa Capilla de San Andrés de Jaén (1650-1900 Persons, Techniques and Accounting Changes in the St Andrew Holy Chapel in Jaen (1650-1900 Fernando Rubín: La contabilidad en el Ayuntamiento de Sevilla en el último tercio del siglo XVI: el Libro Mayor de Caja Accounting in the Seville City Council during the Last Third of the16th Century: the Ledger Susana Villaluenga de Gracia: La Catedral de Toledo en la primera mitad del siglo XVI: Organización Administrativa, Rentas y Contabilidad The Toledo Cathedral at the First Half of the 16th Century: Administrative Organization, Income and Accounting

  1. The warrior stelae of Almadén de la Plata (Sevilla. Morphology, technology and context

    Directory of Open Access Journals (Sweden)

    García SanJuán, Leonardo

    2006-12-01

    Full Text Available This paper presents the study of two prehistoric stelae recently found in the North of the province of Sevilla (Andalusia, Spain. First, the circumstances of both discoveries are described, as part of the ongoing archaeological research that the University of Sevilla has been carrying out in western Sierra Morena since the late 1980s. Secondly, both are analysed from various perspectives, including their morphology and symbolism, their technological characterisation as well as their functional, spatial and territorial contexts.

    Este artículo aborda el estudio de dos estelas prehistóricas encontradas recientemente al Norte de la provincia de Sevilla. Se procede en primer lugar describiendo las circunstancias de los descubrimientos de ambas piezas, así como el marco científico-académico en el que se insertan dentro de las investigaciones que la Universidad de Sevilla vienen desarrollando desde finales de los 1980 en Sierra Morena occidental. A continuación se realiza el análisis de ambos monumentos desde el punto de vista de su morfología y simbología, caracterización tecnológica y contexto funcional, espacial y territorial.

  2. A sea spray aerosol flux parameterization encapsulating wave state

    Science.gov (United States)

    Ovadnevaite, J.; Manders, A.; de Leeuw, G.; Ceburnis, D.; Monahan, C.; Partanen, A.-I.; Korhonen, H.; O'Dowd, C. D.

    2014-02-01

    A new sea spray source function (SSSF), termed Oceanflux Sea Spray Aerosol or OSSA, was derived based on in-situ sea spray aerosol measurements along with meteorological/physical parameters. Submicron sea spray aerosol fluxes derived from particle number concentration measurements at the Mace Head coastal station, on the west coast of Ireland, were used together with open-ocean eddy correlation flux measurements from the Eastern Atlantic Sea Spray, Gas Flux, and Whitecap (SEASAW) project cruise. In the overlapping size range, the data for Mace Head and SEASAW were found to be in a good agreement, which allowed deriving the new SSSF from the combined dataset spanning the dry diameter range from 15 nm to 6 μm. The OSSA source function has been parameterized in terms of five lognormal modes and the Reynolds number instead of the more commonly used wind speed, thereby encapsulating important influences of wave height, wind history, friction velocity, and viscosity. This formulation accounts for the different flux relationships associated with rising and waning wind speeds since these are included in the Reynolds number. Furthermore, the Reynolds number incorporates the kinematic viscosity of water, thus the SSSF inherently includes dependences on sea surface temperature and salinity. The temperature dependence of the resulting SSSF is similar to that of other in-situ derived source functions and results in lower production fluxes for cold waters and enhanced fluxes from warm waters as compared with SSSF formulations that do not include temperature effects.

  3. NSI customer service representatives and user support office: NASA Science Internet

    Science.gov (United States)

    1991-01-01

    The NASA Science Internet, (NSI) was established in 1987 to provide NASA's Offices of Space Science and Applications (OSSA) missions with transparent wide-area data connectivity to NASA's researchers, computational resources, and databases. The NSI Office at NASA/Ames Research Center has the lead responsibility for implementing a total, open networking program to serve the OSSA community. NSI is a full-service communications provider whose services include science network planning, network engineering, applications development, network operations, and network information center/user support services. NSI's mission is to provide reliable high-speed communications to the NASA science community. To this end, the NSI Office manages and operates the NASA Science Internet, a multiprotocol network currently supporting both DECnet and TCP/IP protocols. NSI utilizes state-of-the-art network technology to meet its customers' requirements. THe NASA Science Internet interconnects with other national networks including the National Science Foundation's NSFNET, the Department of Energy's ESnet, and the Department of Defense's MILNET. NSI also has international connections to Japan, Australia, New Zealand, Chile, and several European countries. NSI cooperates with other government agencies as well as academic and commercial organizations to implement networking technologies which foster interoperability, improve reliability and performance, increase security and control, and expedite migration to the OSI protocols.

  4. Effects of Implementing Adaptable Channelization in Wi-Fi Networks

    Directory of Open Access Journals (Sweden)

    Abid Hussain

    2016-01-01

    Full Text Available The unprecedented increase of wireless devices is now facing a serious threat of spectrum scarcity. The situation becomes even worse due to inefficient frequency distribution protocols, deployed in trivial Wi-Fi networks. The primary source of this inefficiency is static channelization used in wireless networks. In this work, we investigate the use of dynamic and flexible channelization, for optimal spectrum utilization in Wi-Fi networks. We propose optimal spectrum sharing algorithm (OSSA and analyze its effect on exhaustive list of essential network performance measuring parameters. The elementary concept of the proposed algorithm lies in the fact that frequency spectrum should be assigned to any access point (AP based on its current requirement. The OSSA algorithm assigns channels with high granularity, thus maximizing spectrum utilization by more than 20% as compared to static width channel allocation. This optimum spectrum utilization, in turn, increases throughput by almost 30% in many deployment scenarios. The achieved results depict considerable decrease in interference, while simultaneously increasing range. Similarly signal strength values at relatively longer distances improve significantly at narrower channel widths while simultaneously decreasing bit error rates. We found that almost 25% reduction in interference is possible in certain scenarios through proposed algorithm.

  5. Osteology and radiology of the Maned Wolf (Chrysocyon brachyurus) pelvic limb.

    Science.gov (United States)

    Siqueira, R C; Rahal, S C; Inamassu, L R; Mamprim, M J; Felix, M; Castilho, M S; Mesquita, L R; Ribeiro, V L; Teixeira, C R; Rassy, F B

    2017-12-01

    This study describes the osteology and radiology of the pelvic limb in maned wolves. Ten (five live and five dead) maned wolves (Chrysocyon brachyurus), five males and five females, aged from 2 to 7 years old were used. Digital radiographs were taken and recorded for both pelvic limbs in all animals. Osteology was correlated with the radiographic images. The pelvis had a rectangular shape, and the obturator foramen (foramen obturatum) was oval. The femoral neck (collum femoris) was short and thick. The greater trochanter (trochanter major) extended proximally to near the dorsum of the femoral head (caput ossis femoris). The lateral femoral condyle (condylus lateralis) was larger than the medial condyle (condylus medialis), and the intercondylar fossa (fossa intercondylaris) had a slightly oblique orientation. The proximal tibia displayed medial and lateral condyles with the medial larger. The femur was slightly shorter than the tibia. Seven tarsal bones (ossa tarsi) were present, four long metatarsal bones (ossa metatarsalia II - V) and a short first metatarsal bone (os metatarsal I). © 2017 Blackwell Verlag GmbH.

  6. Energy balance and deformation mechanisms of duplexes

    Science.gov (United States)

    Mitra, Gautam; Boyer, Steven E.

    A duplex consists of a series of imbricate faults that are asymptotic to a roof thrust and a floor thrust. Depending on the final orientations of the imbricate faults and the final position of the branch lines, a duplex may be hinterland-dipping, foreland-dipping, or an antiformal stack. The exact geometry depends on various factors such as the initial dimensions of the individual slices (horses), their lithology, the amount of displacement (normalized to size of horse) on each fault, and the mechanics of movement along each fault. The energy required in duplex formation can be determined by calculating the total work involved in emplacing each horse: this is given by where W t=W p+W b+W g+W iWp is the work involved in initiating and propagating a fracture. Wb is the work involved in basal sliding, which may be frictional or some form of ductile flow, Wg is the work done against gravity during the emplacement of the horse, and Wi is the work involved in the internal deformation of the horse. By calculating and comparing these work terms it is possible to predict the conditions under which the different types of duplexes will form. Normally, the development of a hinterland-dipping duplex is most likely. However, if deformation conditions are favorable, displacements on individual imbricate faults may be very large compared to the size of the horses, leading to the formation of either antiformal stacks or foreland-dipping duplexes.

  7. Los materiales hercínicos de la cordillera ibérica en el contexto del macizo ibérico

    Directory of Open Access Journals (Sweden)

    Liñán, E.

    1988-12-01

    Full Text Available The discontinuity observed between the paleozoic outcrops of the Iberian Mountains and the ones of the Iberian Massif, has been the greatest incovenient to include those ones in a general Hercynian Iberian model. Two hypothesis have been proposed to the respect. One initial hypothesis postulates the inclusion of the Iberian Mountains paleozoic racks in the West Asturian-Leonese Zone (Lotze, 1961; Julivert et al., 1974. Other one postulates a double inelusion: the occidental part of the Iberian Chaines into the West Asturian-Leonese Zone and the oriental part of the Iberian Chaines into the Cantabrian Zona (Liñán, 1983. In this work new geological data are provided for the geological conexion between Cantabrian Zone and the oriental part of the Iberian Chains; they can be summarised in three points. One of them is referred to the paralellism between the Narcea and Paracuellos antiforms. Those antiforms are divided by a tectonic accident, wich separates different Precambrian sequences. Another point deals with the close relation of the stratigraphical sequences of the Paleozoic racks between the Cantabrian region and Iberian region at both sides of the Narcea and Paracuellos antiforms. the last point refers to the study of small outcrops located in the northwest of the Iberian Chains, that show a probably more similar geological structure to the Cantabrian Zone wich was defined as a fold and thrust belt.La falta de continuidad de los afloramientos paleozoicos de la Cordillera Ibérica con los del Macizo Ibérico han venido constituyendo un serio obstáculo para la inclusión de aquéllos dentro de un esquema general para el hercínico ibérico. Dos hipótesis han sido hasta ahora planteadas: su conexión con la Zona Asturoccidental-Leonesa, o su doble conexión con esta zona y con la zona Cantábrica. En este trabajo se aportan nuevos datos geológicos que son congruentes con la prolongación tanto de la Zona Cantábrica como de la Zona

  8. Restoring the Central Anatolian Crystalline Complex to its late Cretaceous configuration

    Science.gov (United States)

    Lefebvre, C.; van Hinsbergen, D. J. J.; Kaymakci, N.; Vissers, R. L. M.

    2012-04-01

    The Anatolian region recorded the closure history of the Neotethyan Ocean(s) situated between the converging African and Eurasian continents during late Mesozoic - Cenozoic times. The location of the former northern Neo-Tethyan ocean is marked today by the presence of an ophiolitic mélange forming the Izmir-Ankara-Erzincan Suture Zone (IAESZ). South of the IAESZ, the Central Anatolian Crystalline Complex (CACC) is the largest metamorphic domain exposed in Turkey, which mainly consists of metamorphic rocks, ophiolites and magmatic intrusions. This crystalline domain experienced a complex tectonic history involving late Cretaceous obduction of ophiolitic nappes onto Paleozoic-Mesozoic sedimentary units, development of a regional Barrovian metamorphism, and widespread magmatic intrusions. However, no consensus has been reached so far about a unique geodynamic scenario to explain in which setting the CACC evolved during the late Cretaceous. We present here a multi-scale and multi-disciplinary study of the tectono-metamorphic evolution of the CACC, and integrates the obtained results with data from the literature in order to propose a plausible tectonic model for the evolution of the CACC in the late Cretaceous. The tectono-metamorphic history of the central Anatolian metamorphic rocks has been investigated through detailed microstructural, metamorphic and geochronological analysis, together with local and regional mapping of ductile structures and metamorphic field gradients. An extended set of paleomagnetic data from the central Anatolian granitoids provides constraints for restoring the large-scale geometry of the CACC into its late Cretaceous configuration. The main results of this study revealed that during the late Cretaceous the CACC consisted of a NNE-SSW elongated and narrow dome-shaped antiformal structure (~500x150km). In this configuration, regional Barrovian metamorphism was accompanied with a top-to-the-SSW ductile crustal flow in the deeper part of the

  9. Aplicaciones industriales de los terrenos arcillosos de la provincia de Córdoba

    OpenAIRE

    Daza Sánchez, Antonio

    2011-01-01

    Esta Tesis ha investigado las lutitas de Sierra Morena y las arcillas margosas con poca calcita de la Campiña de Córdoba, para suministrar materias primas a la fabricación de bloques y productos cerámicos. En la caracterización del subsuelo de la Campiña se han planificado cuatro zonas de trabajo de 4 km² cada una, donde se han aplicado métodos geofísicos basados en perfiles de Tomografía Eléctrica y Sondeos Eléctricos Verticales (SEV). En estaciones de muestreo de cada zona se han realizado ...

  10. Religiosidad popular, territorio y poder; santuarios supracomunales y simbolización de las relaciones intracomarcales

    Directory of Open Access Journals (Sweden)

    Juan Agudo Torrico

    1993-02-01

    Full Text Available Las unidades de observación que han servido de base para la elaboración del presente artículo, hacen referencia, de forma directa, al trabajo de campo realiza­do en dos lugares de Andalucía, ambos incluidos en lo que es Sierra Morena, pero pertenecientes a dos provincias distintas y a comarcas muy alejadas entre sí y con una experiencia histórica diferente. El primero de ellos sería el Santuario de la Virgen de Guía en la Comarca del Valle de los Pedroches, al norte de la provincia de Córdoba; el segundo el de la Reina de los Angeles, en la comarca septentrional onubense de la Sierra de Aracena.

  11. (U)levelige slægtskaber

    DEFF Research Database (Denmark)

    Petersen, Michael Nebeling; Myong, Lene

    2012-01-01

    The Danish movie Rosa Morena (2010) tells an unusual story about kinship in which a white homosexual Danish man adopts a child born to a poor black Brazilian woman. Using a theoretical framework of biopolitics and affective labour the article highlights how the male homosexual figure is being cast....... A specific distribution of affect, where anger turns into gratefulness fixates and relegates the birth mother to a state of living dead, and thus she becomes the bearer of an unliveable kinship. This economy of life and death constructs transnational adoption as a vital event in a Foucauldian sense....... In the same instance as the adoption, a white male homosexual population unfolds into life, and it targets a racialized and poor population as if already dead....

  12. Flexible endoscopic cricopharyngeal myotomy - The gold standard for the management of Zenker's diverticulum.

    Science.gov (United States)

    Juzgado Lucas, Diego

    2016-06-01

    The prevalence of Zenker's diverticulum (ZD) is difficult to estimate. If we focus on some published data, it may be as low as 2 new cases per 100,000 inhabitants per year in the United Kingdom, which is in contrast the with feeling in some endoscopy units, that this condition's prevalence is increasing year after year. Prevalence likely remains the same as ever, but the addition of factors such as population ageing, optimal diagnostic care, availability of effective endoscopic management, increased awareness, and cumulative experience in some endoscopy teams, may well have increasingly brought this condition to our attention in our daily practice. This is reflected by an unbelievable 18 ZDs over the last 18 months, as discussed in the manuscript by Dr. de la Morena, reported in this issue of The Spanish Journal of Digestive Diseases (Revista Española de Enfermedades Digestivas.

  13. Photosynthesis and water relations of mature and resprout chaparral vegetation

    International Nuclear Information System (INIS)

    Hastings, S.J.; Oechel, W.C.

    1982-01-01

    Photosynthesis, leaf conductance, and water potential were measured in the field over time, on mature (ca. 34 years) and resprouts of Arctostaphylos glandulosa Eastw., Quercus dumosa nutt., and Adenostoma fasciculatum H and A. The experimental site is within the US Forest Service's Laguna-Morena Demonstration area of the Cleveland National Forest in southern California. It is characterized as a mixed chaparral community located on an east-facing slope at ca. 1400-meter elevation. Plots of the mature vegetation were marked off (250 meters wide, 675 meters long) and the aboveground biomass removed by either handclearing or controlled burning. Measurements were typically made from sunrise to sunset. A null balance porometer, Sholander pressure bomb, and carbon-14 dioxide were utilized to measure leaf conductance, water potential, and carbon dioxide uptake, respectively

  14. Análisis de la pigmentación cutánea en una muestra.

    Science.gov (United States)

    Castanedo-Cazares, Juan Pablo; Hernández-Blanco, Diana; García-Cortés, Juan Diego; Medina-Aguilar, Liliana; Torres-Álvarez, Bertha

    2018-01-01

    La mezcla de melanina, hemoglobina y carotenos definen el color cutáneo. La pigmentación constitutiva está determinada genéticamente, la facultativa se induce cuando la piel se expone al ambiente. El objetivo fue cuantificar ambas pigmentaciones en una muestra de población mexicana, y analizar su relación con el género, edad y fototipo. Se evaluaron 259 personas durante un periodo invernal. La colorimetría cutánea se obtuvo mediante espectrometría de reflectancia difusa utilizando las coordenadas de la Comisión Internacional de Iluminación. Se registraron los valores L*a*b* y se estimó el ángulo tipológico individual (ATI°) en frente, tórax, cuello, antebrazos y glúteos. La pigmentación facultativa difirió de la constitutiva en los parámetros L*, a*, y ATIº. En hombres, los valores facultativos de L* y ATI° fueron menores. La pigmentación constitutiva fue similar entre sexos. Los fototipos III, IV y V muestran diferencias en L*, b* y ATI°. Los valores facultativos L*, a*, ATI° y el constitutivo a* se reducen al incrementarse la edad. Se cuantificaron los tonos cutáneos de una muestra de población reconociéndose los valores para la piel blanca, morena clara y morena oscura. Se presenta un marco de referencia para estudios relacionados con la pigmentación cutánea en México. Copyright: © 2018 SecretarÍa de Salud

  15. Critical issues in NASA information systems

    Science.gov (United States)

    1987-01-01

    The National Aeronautics and Space Administration has developed a globally-distributed complex of earth resources data bases since LANDSAT 1 was launched in 1972. NASA envisages considerable growth in the number, extent, and complexity of such data bases, due to the improvements expected in its remote sensing data rates, and the increasingly multidisciplinary nature of its scientific investigations. Work already has begun on information systems to support multidisciplinary research activities based on data acquired by the space station complex and other space-based and terrestrial sources. In response to a request from NASA's former Associate Administrator for Space Science and Applications, the National Research Council convened a committee in June 1985 to identify the critical issues involving information systems support to space science and applications. The committee has suggested that OSSA address four major information systems issues; centralization of management functions, interoperability of user involvement in the planning and implementation of its programs, and technology.

  16. Stress fractures in athletes

    International Nuclear Information System (INIS)

    Kirschberger, R.; Henning, A.; Graff, K.H.

    1984-01-01

    The early exclusion of the presence of a stress fracture may be decisive for the success of an athlete. Scintigraphy with a bone-seeking radiopharmaceutical is suitable for the early detection of stress lesions. Of 30 athletes, fractures were demonstrated in 17 whereas in 6 they were excluded. We found most fractures in the tarsal bones such as os naviculare pedis, ossa cuneiformia and talus. The type of sport engaged in appears to be an important factor in determining the location of the fracture. Scintiphotos were taken in several views using region of interest techniques and two phase-scintigraphy. This method is considered to be useful for localization and follow-up of skeletal stress lesions as well as for differential diagnosis. (orig.) [de

  17. Stress fractures in athletes

    Energy Technology Data Exchange (ETDEWEB)

    Kirschberger, R.; Henning, A.; Graff, K.H.

    1984-12-01

    The early exclusion of the presence of a stress fracture may be decisive for the success of an athlete. Scintigraphy with a bone-seeking radiopharmaceutical is suitable for the early detection of stress lesions. Of 30 athletes, fractures were demonstrated in 17 whereas in 6 they were excluded. We found most fractures in the tarsal bones such as os naviculare pedis, ossa cuneiformia and talus. The type of sport engaged in appears to be an important factor in determining the location of the fracture. Scintiphotos were taken in several views using region of interest techniques and two phase-scintigraphy. This method is considered to be useful for localization and follow-up of skeletal stress lesions as well as for differential diagnosis.

  18. Mirror symmetry

    CERN Document Server

    Voisin, Claire

    1999-01-01

    This is the English translation of Professor Voisin's book reflecting the discovery of the mirror symmetry phenomenon. The first chapter is devoted to the geometry of Calabi-Yau manifolds, and the second describes, as motivation, the ideas from quantum field theory that led to the discovery of mirror symmetry. The other chapters deal with more specialized aspects of the subject: the work of Candelas, de la Ossa, Greene, and Parkes, based on the fact that under the mirror symmetry hypothesis, the variation of Hodge structure of a Calabi-Yau threefold determines the Gromov-Witten invariants of its mirror; Batyrev's construction, which exhibits the mirror symmetry phenomenon between hypersurfaces of toric Fano varieties, after a combinatorial classification of the latter; the mathematical construction of the Gromov-Witten potential, and the proof of its crucial property (that it satisfies the WDVV equation), which makes it possible to construct a flat connection underlying a variation of Hodge structure in the ...

  19. DOBRE-2 WARR profile

    DEFF Research Database (Denmark)

    Starostenko, V.; Janik, T.; Stephenson, R.

    2016-01-01

    (the easternmost part of Crimea) and the northern East Black Sea Basin, thus traversing the entire Crimea–Caucasus compressional zone centred on the Kerch Peninsula. The DOBRE-2 profile recorded a mix of onshore explosive sources as well as airguns at sea. A variety of single-component recorders were...... rocks. A narrow unit as shallow as about 5 km and characterized by velocities typical of the crystalline basement bounds the metasedimentary succession on its southern margin and also marks the northern margin of the northern foredeep and the underlying successions of the Crimea–Caucasus compressional...... zone in the southern part of the Azov Sea. A broader and somewhat deeper basement unit (about 11 km) with an antiformal shape lies beneath the northern East Black Sea Basin and forms the southern margin of the Crimea–Caucasus compressional zone. The depth of the underlying Moho discontinuity increases...

  20. Validation and reliability of the sex estimation of the human os coxae using freely available DSP2 software for bioarchaeology and forensic anthropology.

    Science.gov (United States)

    Brůžek, Jaroslav; Santos, Frédéric; Dutailly, Bruno; Murail, Pascal; Cunha, Eugenia

    2017-10-01

    A new tool for skeletal sex estimation based on measurements of the human os coxae is presented using skeletons from a metapopulation of identified adult individuals from twelve independent population samples. For reliable sex estimation, a posterior probability greater than 0.95 was considered to be the classification threshold: below this value, estimates are considered indeterminate. By providing free software, we aim to develop an even more disseminated method for sex estimation. Ten metric variables collected from 2,040 ossa coxa of adult subjects of known sex were recorded between 1986 and 2002 (reference sample). To test both the validity and reliability, a target sample consisting of two series of adult ossa coxa of known sex (n = 623) was used. The DSP2 software (Diagnose Sexuelle Probabiliste v2) is based on Linear Discriminant Analysis, and the posterior probabilities are calculated using an R script. For the reference sample, any combination of four dimensions provides a correct sex estimate in at least 99% of cases. The percentage of individuals for whom sex can be estimated depends on the number of dimensions; for all ten variables it is higher than 90%. Those results are confirmed in the target sample. Our posterior probability threshold of 0.95 for sex estimate corresponds to the traditional sectioning point used in osteological studies. DSP2 software is replacing the former version that should not be used anymore. DSP2 is a robust and reliable technique for sexing adult os coxae, and is also user friendly. © 2017 Wiley Periodicals, Inc.

  1. Spectral features of nasals in Standard Latvian

    Directory of Open Access Journals (Sweden)

    Jana Taperte

    2015-12-01

    Full Text Available In the article, the acoustic features of nasals in Standard Latvian are investigated. The aim of the study is to examine whether some of the spectral properties of nasal murmur (namely anti-formant frequency, as well as frequency and bandwidth of the first nasal formant can be considered as efficient cues for distinguishing between nasal places of articulation.Speech recordings from 10 native speakers of Standard Latvian, five male and five female, aged 19–39, without any disorders or dialectal traces in their pronunciation, were used for the analysis. Prevocalic nasals [m; n; ɲ] were analyzed in isolated CVC syllables, where C is one of the nasals and V is one of the vowels [i(ː; e(ː; æ(ː; ɑ(ː; ɔ(ː; u(ː]. The velar [ŋ] — the allophone of the phoneme /n/ — was recorded in postvocalic position in [k]V[ŋks] structure units. 1260 items were analyzed in total.According to the results, the nasals of Standard Latvian can be distinguished by anti-formant frequencies rather efficiently, and the results generally agree with those obtained in previous research of Latvian as well as data reported for other languages. The frequencies and the bandwidths of the first nasal formant are less informative regarding nasal place of articulation and can be used only for distinguishing between [ŋ] and [m; n; ɲ]. Conducting perception tests to assess the auditory relevance of these acoustic features is necessary.

  2. Three Types of Flower Structures in a Divergent-Wrench Fault Zone

    Science.gov (United States)

    Huang, Lei; Liu, Chi-yang

    2017-12-01

    Flower structures are typical features of wrench fault zones. In conventional studies, two distinct kinds of flower structures have been identified based on differences in their internal structural architecture: (1) negative flower structures characterized by synforms and normal separations and (2) positive flower structures characterized by antiforms and reverse separations. In addition to negative and positive flower structures, in this study, a third kind of flower structure was identified in a divergent-wrench fault zone, a hybrid characterized by both antiforms and normal separations. Negative flower structures widely occur in divergent-wrench fault zones, and their presence indicates the combined effects of extensional and strike-slip motion. In contrast, positive and hybrid flower structures occur only in fault restraining bends and step overs. A hybrid flower structure can be considered as product of a kind of structural deformation typical of divergent-wrench zones; it is the result of the combined effects of extensional, compressional, and strike-slip strains under a locally appropriate compressional environment. The strain situation in it represents the transition stage that in between positive and negative flower structures. Kinematic and dynamic characteristics of the hybrid flower structures indicate the salient features of structural deformation in restraining bends and step overs along divergent-wrench faults, including the coexistence of three kinds of strains (i.e., compression, extension, and strike-slip) and synchronous presence of compressional (i.e., typical fault-bend fold) and extensional (normal faults) deformation in the same place. Hybrid flower structures are also favorable for the accumulation of hydrocarbons because of their special structural configuration in divergent-wrench fault zones.

  3. Metamorphic evolution of the Lesser Himalayan Crystalline Sequence, Siyom Valley, NE Himalaya, India

    Science.gov (United States)

    Nandini, P.; Thakur, S. S.

    2011-03-01

    The paper reports classical Barrovian inverted metamorphism in the Lesser Himalayan Crystalline Sequence, Siyom Valley, NE Himalaya. The sequence is thrust-bounded and constitutes a part of the western limb of the Siang antiform. Six metamorphic zones are delineated with increasing grade from biotite zone through garnet-, staurolite-, kyanite-, sillimanite- to sillimanite-K-feldspar zone with increasing structural level. Granulite-facies pelitic assemblages, marked by the occurrence of garnet + cordierite occur in the sillimanite-K-feldspar zone. Three phases of folding, F 1, F 2 and F 3 and two generations of planar structures, S 1 and S 2 are recognised. Peak metamorphic mineral growths are dominantly syn-F 2. Metamorphic isograds and boundary thrusts of the sequence are co-folded around the Siang antiform by F 3 deformation. Garnet shows prograde growth zoning in lower grade rocks and retrograde diffusion zoning in higher grade rocks. Pelites of the sillimanite-K-feldspar zone show textural evidence of decompression such as corona of cordierite around kyanite. Breakdown reactions of muscovite and biotite in this zone are attributed to decompression. Geothermobarometric calculations show gradual increase of temperature from garnet zone to sillimanite-K-feldspar zone, whereas pressure increases sharply from garnet zone to staurolite zone and remains nearly constant thereafter. Peak metamorphism reached temperature of >750 °C and pressure of ˜10 kbar in the sillimanite-K-feldspar zone. P-T estimates, decompression reactions and pseudosection topologies suggest a clockwise path with steep decompression for the evolution of the sillimanite-K-feldspar zone in the Siyom Valley.

  4. Joint Optimization of Vertical Component Gravity and Seismic P-wave First Arrivals by Simulated Annealing

    Science.gov (United States)

    Louie, J. N.; Basler-Reeder, K.; Kent, G. M.; Pullammanappallil, S. K.

    2015-12-01

    Simultaneous joint seismic-gravity optimization improves P-wave velocity models in areas with sharp lateral velocity contrasts. Optimization is achieved using simulated annealing, a metaheuristic global optimization algorithm that does not require an accurate initial model. Balancing the seismic-gravity objective function is accomplished by a novel approach based on analysis of Pareto charts. Gravity modeling uses a newly developed convolution algorithm, while seismic modeling utilizes the highly efficient Vidale eikonal equation traveltime generation technique. Synthetic tests show that joint optimization improves velocity model accuracy and provides velocity control below the deepest headwave raypath. Detailed first arrival picking followed by trial velocity modeling remediates inconsistent data. We use a set of highly refined first arrival picks to compare results of a convergent joint seismic-gravity optimization to the Plotrefa™ and SeisOpt® Pro™ velocity modeling packages. Plotrefa™ uses a nonlinear least squares approach that is initial model dependent and produces shallow velocity artifacts. SeisOpt® Pro™ utilizes the simulated annealing algorithm and is limited to depths above the deepest raypath. Joint optimization increases the depth of constrained velocities, improving reflector coherency at depth. Kirchoff prestack depth migrations reveal that joint optimization ameliorates shallow velocity artifacts caused by limitations in refraction ray coverage. Seismic and gravity data from the San Emidio Geothermal field of the northwest Basin and Range province demonstrate that joint optimization changes interpretation outcomes. The prior shallow-valley interpretation gives way to a deep valley model, while shallow antiformal reflectors that could have been interpreted as antiformal folds are flattened. Furthermore, joint optimization provides a clearer image of the rangefront fault. This technique can readily be applied to existing datasets and could

  5. Timing of isoclinal folds in multiply deformed high metamorphic grade region using FIA succession

    Science.gov (United States)

    Cao, Hui; Cai, Zhihui

    2013-04-01

    Multiply deformed and isoclinally folded interlayered high metamorphic grade gneisses and schists can be very difficult rocks for resolving early formed stratigraphic and structural relationships. When such rocks contain porphyroblasts a new approach is possible because of the way in which porphyroblast growth is affected by crenulation versus reactivation of compositional layering. The asymmetries of the overprinting foliations preserved as inclusion trails that define the FIAs can be used to investigate whether an enigmatic isoclinal fold is an antiform or synform. This approach also reveals when the fold first formed during the tectonic history of the region. Isoclinally folded rocks in the Arkansas River region of Central Colorado contain relics of fold hinges that have been very difficult to ascertain whether they are antiforms or synforms because of younger refolding effects and the locally truncated nature of coarse compositional layering. With the realization that rocks with a schistosity parallel to bedding (S0 parallel S1) have undergone lengthy histories of deformation that predate the obvious first deformation came recognition that large scale regional folds can form early during this process and be preserved throughout orogenesis. This extensive history is lost within the matrix because of reactivational shear on the compositional layering. However, it can be extracted by measuring FIAs. Recent work using this approach has revealed that the trends of axial planes of all map scale folds, when plotted on a rose diagram, strikingly reflect the FIA trends. That is, although it was demonstrated that the largest scale regional folds commonly form early in the total history, other folds can form and be preserved from subsequent destruction in the strain shadows of plutons or through the partitioning of deformation due to heterogeneities at depth.

  6. Thrust tectonics in crystalline domains: The origin of a gneiss dome

    Science.gov (United States)

    Greiling, R. O.

    1997-12-01

    Structural geological field work, microscopic and magnetic fabric studies have been applied in order to assess the structural origin of a gneiss dome, based on a regional example from the Neoproterozoic Pan-African Belt of NE Africa, the Wadi Hafafit Culmination (WHC). The culmination is dominated by a number of major shear zones, which form both the boundaries between the gneissic core and surrounding low grade successions as well as those of minor structural units within the gneisses. These shear zones form a linked fault system, which, based on shear criteria, fault-bend fold and overall geometric interrelationships, can be classified as an antiformal stack. The relative age sequence of the shear zones/thrusts with the highest thrust oldest and the lowermost youngest points to a forward-propagating thrust system. This, together with the shear criteria, exclude an origin of the WHC as a metamorphic core complex, where the highest shear zone should be youngest. The geometry of the WHC antiformal stack is documented by maps and sections as well as section balancing and restoration. Microscopic work showed brittle deformation in feldspar and dynamic recrystallization in quartz ribbons. The asymmetry of the fabric confirmed the macroscopically determined shear sense. However, there is one example of an earlier, perhaps extensional shear movement. Mylonitic foliation and transport-parallel lineation have also been determined by magnetic fabric studies. The observations suggest that thrusts may cut across both previously folded crystalline rocks as well as homogeneous granitoid plutonic bodies. According to the regional tectonic picture the large-scale structure of the gneiss dome originated after a phase of (late-orogenic) extensional collapse. It is speculated that during late-orogenic cooling the upper part of the lithosphere was sufficiently strong to allow brittle thrusting whilst the lithosphere as a whole was still weak enough to allow large-scale compressional

  7. Sedução e identidade nacional: dançarinas eróticas brasileiras no Queens, Nova York Performing Seduction and National Identity: Brazilian Erotic Dancers in New York

    Directory of Open Access Journals (Sweden)

    Suzana Maia

    2009-12-01

    Full Text Available Este artigo examina a trajetória de mulheres brasileiras que trabalham como dançarinas eróticas em bares noturnos da cidade de Nova York. Parte-se do pressuposto de que processos de globalização e transnacionalismo estão relacionados não apenas a transformações políticoeconômicas, como também a mudanças na maneira com que as pessoas se relacionam, como utilizam seus corpos e realizam seus desejos. Tais transformações devem também ser entendidas em relação ao regime colonial e pós-colonial, em que representações sobre seus corpos ganham inteligibilidade. A maioria das mulheres consideradas pela pesquisa é proveniente das classes médias e, quanto à raça, tendem a se autodenominar "morenas". A partir de trabalho de campo realizado durante os anos de 2004 e 2005, eu analiso de que forma essas posições e identidades sociais são traduzidas de um contexto a outro, e como novas hierarquias sociais são construídas num contexto transnacional. Tomando como foco de estudo o Blue Diamond, um bar localizado no bairro do Queens, este artigo examina como tais reconfigurações transnacionais são articuladas através das interações cotidianas entre dançarinas e entre essas e seus clientesThis article examines the trajectory of Brazilian women who work as erotic dancers in New York City's gentlemen's bars. It argues that processes of globalization and transnationalism are related not just with political-economic transformations, but also to significant shifts in the ways people relate to each other, use their bodies, and conceive and realize their desires. Such transformations must also be understood in relation to a colonial and post-colonial regime, in which representations about their bodies gain intelligibility. Most of the women who participated in my research are from the middle-classes, and in terms of race, they self-identify as "morenas". Based on fieldwork conducted between years 2004-2005, I analyze how their social

  8. Staphylococcus aureus: nuevos y antiguos antimicrobianos Staphylococcus aureus: new and old antimicrobial agents

    Directory of Open Access Journals (Sweden)

    B. Perazzi

    2010-09-01

    Full Text Available El objetivo del trabajo fue evaluar la sensibilidad a antiguos y nuevos antimicrobianos de aislamientos de Staphylococcus aureus resistentes a la oxacilina, de origen hospitalario (SAOR-H y adquiridos en la comunidad (SAOR-AC, y también en aislamientos sensibles a la oxacilina (SAOS. Se estudió en forma prospectiva la concentración inhibitoria mínima a diversos antimicrobianos en 118 aislamientos consecutivos por dilución seriada en agar según las indicaciones del CLSI. En los aislamientos de SAOR sin resistencia acompañante se determinó la presencia de los genes mec A, leucocidina de Panton Valentine (LPV y γ-hemolisina por PCR, y del cassette SCC mec por PCR múltiple. De los 118 aislamientos estudiados, 44 fueron SAOR-H, 16 SAOR-AC y 58 SAOS. Los aislamientos de SAOR-H presentaron resistencia simultánea a eritromicina, clindamicina, gentamicina, ciprofloxacina, levofloxacina y moxifloxacina, y todos fueron sensibles a tigeciclina (TIG, vancomicina, teicoplanina y linezolid (LZD. Los aislamientos de SAOR-AC fueron resistentes solamente a OXA y sensibles a todos los antimicrobianos ensayados. En todos ellos se detectaron los genes mec A, LPV, γ-hemolisina y el cassette SCC mec IV. En SAOS y en SAOR-AC todos los antimicrobianos no ß-lactámicos ensayados presentaron excelente actividad in vitro, mientras que en SAOR-H sólo los antiguos antimicrobianos como glucopéptidos, doxiciclina, rifampicina y trimetoprima-sulfametoxazol presentaron buena actividad in vitro, al igual que LZD y TIG entre los nuevos antimicrobianos. El fenotipo de SAOR sin resistencia acompañante fue altamente predictivo de SAOR-AC, ya que fue confirmado por presentar el cassette SCC mec IV.The objective of the study was to evaluate the susceptibility to old and new antimicrobial agents against hospital-acquired oxacillin-resistant Staphylococcus aureus (HA-ORSA, community-acquired oxacillin-resistant S. aureus (CA-ORSA, and oxacillin-susceptible S. aureus (OSSA

  9. Efeito antimicrobiano e modulador do óleo essencial extraído da casca de frutos da Hymenaea courbaril L.

    Directory of Open Access Journals (Sweden)

    Gleilton Weyne Passos Sales

    2014-09-01

    Full Text Available O Jatobá (Hymenaea courbaril L. possui um amplo histórico de utilização, seus frutos são compostos por óleos essenciais, taninos, substâncias amargas, matérias resinosas e pécticas, amido e açúcares, O objetivo deste estudo foi avaliar a atividade antimicrobiana e moduladora do óleo essencial extraído da casca de frutos da Hymenaea courbaril L, (OEHc sobre cepas de S, aureus oxacilina sensíveis (OSSA de referência, Para a avaliação da atividade antimicrobiana foram determinadas as Concentrações Inibitória (CIM e Letal Mínimas (CLM do OEHc e o efeito do tempo de exposição a concentrações do OEHc, o efeito modulador do OEHc sobre antibióticos de uso clínico foi avaliado pelo teste de difusão em ágar modificado, OEHc inibiu o crescimento das cepas de S, aureus ATCC 6538P (CIM = CLM = 0,28% v/v e S, aureus ATCC 14458 (CIM = 0,28% v/v, CLM = 0,56% v/v, A CLM do OEHc foi capaz de inviabilizar as cepas OSSA testadas em 8 horas (S, aureus ATCC 6538P e 24 horas (S, aureus ATCC 14458 e a CIM inibiu o crescimento de S, aureus ATCC 14458 até 48h de exposição, A ação moduladora do OEHc na atividade de antibióticos de uso clínico variou com o ATM e com a cepa testada, Os resultados encontrados mostram que o OEHc possui uma boa atividade antimicrobiana sobre a espécie Gram-positivo S, aureus, revelando seu efeito modulador sinérgico quando associado a antibióticos de uso clínico, demonstrando ser o OEHc um forte candidato para o desenvolvimento de fármacos com atividade antimicrobiana.

  10. [A microbiological analysis of the ethnopharmacological products used by the Misak people].

    Science.gov (United States)

    Benavides-Hernández, Edison A; Coronel-Gaviria, Anabeli; Ruiz-García, Dalia V

    2014-01-01

    Evaluating microorganism presence, type and quantity in some of the most important ethnopharmacological products designed for oral administration currently being distributed by the Sierra Morena laboratory located in the Guambia Indian reservation (Cauca department, Colombia). This was a cross-sectional descriptive study; it involved microbiological analysis using membrane filtration of six randomly-chosen samples which included the water being used by the laboratory and five of its ethnopharmacological products ready for commercial distribution and sale. The samples studied here were not microbiologically suitable for human consumption because they contained Escherichia coli and fecal coliforms. Colony forming unit (CFU) count/100 mL (reference 0 CFU/100 mL) was found to be up to 63,000 CFU/100 mL in water samples and 110 CFU/100 mL in ethnopharmacological samples. The quantitative results revealed the presence of pathogens, indicating failure in rural water supply and environmental sanitation infrastructure. On-going monitoring of water quality and an urgent intervention of the laboratory'’s ethnopharmacological production is necessary because of the contamination found there.

  11. MURASOC, a parametric model to test climate change effects on soil organic carbon. Application to Southern Spain (Mediterranean áreas)

    Science.gov (United States)

    Parras-Alcántara, Luis; Lozano-García, Beatriz; Brevik, Eric C.; Olaya-Abril, Alfonso; Obregón-Romero, Rafael; Gil Torres, Juan; Recio-Espejo, Jose Manuel

    2016-04-01

    Soil organic carbon (SOC) is formed through the decomposition processes of plant, animal and microbial residues, root exudates, living and dead microorganism and soil biota; and is the main energy source for soil microorganism. Consequently, a strong feedback is stablished among a large number of components in the complex biota-abiota network. Likewise, SOC influences in physical, chemical and biological soil properties such as temperature, cationic exchange capacity and plant growth (Parras-Alcántara et al., 2015). Therefore, to improve our knowledge about what soil variables are more responsible of SOC content would be extremely useful in soils characterization. In many studies, independent variables were related to SOC, however, the possible combined effects of different independent variables and their ability to model SOC have not been considered. On the other hand, over the last few decades interest in soil organic carbon (SOC) has increased due to its role in C sequestration in terrestrial ecosystems, which could contribute to decreasing atmospheric CO2 levels (Lozano-García et al., 2016; Fernández-Romero et al., 2016; Parras-Alcántara and Lozano-García 2014). Then, attempts to model SOC content have multiplied over this time. In this study, 612 soil profiles obtained from the Natura 2000 network of protected areas in the Sierra Morena mountains, (Spain) were used with the following objectives: i) To quantify SOC content according to different variables (analytical, morphological, genetic and climatic) in order to define the variables that are most closely related to SOC content; ii) To model the Current SOC content for a geographic area (Sierra Morena - Spain); iii) To model SOC suitability-habitat under a climate change scenario; iv) To extrapolate the SOC content and distribution model to the wider Andalusia region, showing the areas that have a high probability to experience an increase in their SOC content in coming years; and v) To propose

  12. Soil organic carbon distribution in Mediterranean areas under a climate change scenario via multiple linear regression analysis.

    Science.gov (United States)

    Olaya-Abril, Alfonso; Parras-Alcántara, Luis; Lozano-García, Beatriz; Obregón-Romero, Rafael

    2017-08-15

    Over time, the interest on soil studies has increased due to its role in carbon sequestration in terrestrial ecosystems, which could contribute to decreasing atmospheric CO 2 rates. In many studies, independent variables were related to soil organic carbon (SOC) alone, however, the contribution degree of each variable with the experimentally determined SOC content were not considered. In this study, samples from 612 soil profiles were obtained in a natural protected (Red Natura 2000) of Sierra Morena (Mediterranean area, South Spain), considering only the topsoil 0-25cm, for better comparison between results. 24 independent variables were used to define it relationship with SOC content. Subsequently, using a multiple linear regression analysis, the effects of these variables on the SOC correlation was considered. Finally, the best parameters determined with the regression analysis were used in a climatic change scenario. The model indicated that SOC in a future scenario of climate change depends on average temperature of coldest quarter (41.9%), average temperature of warmest quarter (34.5%), annual precipitation (22.2%) and annual average temperature (1.3%). When the current and future situations were compared, the SOC content in the study area was reduced a 35.4%, and a trend towards migration to higher latitude and altitude was observed. Copyright © 2017 Elsevier B.V. All rights reserved.

  13. Monitoring of emerging pollutants in Guadiamar River basin (South of Spain): analytical method, spatial distribution and environmental risk assessment.

    Science.gov (United States)

    Garrido, Eva; Camacho-Muñoz, Dolores; Martín, Julia; Santos, Antonio; Santos, Juan Luis; Aparicio, Irene; Alonso, Esteban

    2016-12-01

    Guadiamar River is located in the southwest of the Iberian Peninsula and connects two protected areas in the South of Spain: Sierra Morena and Doñana National Park. It is sited in an area affected by urban, industrial and agriculture sewage pollution and with tradition on intensive mining activities. Most of the studies performed in this area have been mainly focused on the presence of heavy metals and, until now, little is known about the occurrence of other contaminants such as emerging organic pollutants (EOPs). In this work, an analytical method has been optimized and validated for monitoring of forty-seven EOPs in surface water. The analytical method has been applied to study the distribution and environmental risk of these pollutants in Guadiamar River basin. The analytical method was based on solid-phase extraction and determination by liquid chromatography-triple quadrupole-tandem mass spectrometry. The 60 % of the target compounds were found in the analyzed samples. The highest concentrations were found for two plasticizers (bisphenol A and di(2-ethyhexyl)phthalate, mean concentration up to 930 ng/L) and two pharmaceutical compounds (caffeine (up to 623 ng/L) and salicylic acid (up to 318 ng/L)). This study allowed to evaluate the potential sources (industrial or urban) of the studied compounds and the spatial distribution of their concentrations along the river. Environmental risk assessment showed a major risk on the south of the river, mainly due to discharges of wastewater effluents.

  14. Vineyard microclimate and yield under different plastic covers

    Science.gov (United States)

    Holcman, Ester; Sentelhas, Paulo Cesar; Conceição, Marco Antônio Fonseca; Couto, Hilton Thadeu Zarate

    2017-12-01

    The use of plastic cover in vineyards minimizes effects of adverse weather conditions. The northwest of São Paulo State is one of the largest grape producing regions in Brazil; however, few studies investigate the effects of different plastic covers on vineyards in this region. This study compared the effect of black shading screen (BSS) and braided polypropylene film (BPF) on BRS Morena vineyard microclimate, grown on an overhead trellis system in the northwestern São Paulo. The experiments were carried out during three growing seasons (2012-2014). BSS allowed superior incoming solar radiation (SR) transmissivity, resulting in higher net radiation (Rn), and higher ratio between photosynthetically active (PAR) and SR. No differences were observed between the average air temperatures (T) and relative humidity (RH) of covered environments (BPF and BSS) and outside condition (automatic weather station-AWS), due to high air circulation, despite wind speed (WS) reduction caused by plastic covers. BPF provided better conditions for vineyard growth with higher fruit yield than vineyard under BSS regarding the number of shoots with bunches per plant, bunch and stem weights, longitudinal diameter of berries, quantity of fertile buds per shoot, and yield per shoot and per plant. BPF covers also influenced leaf size and growth speed of plants in vineyards.

  15. Ma ma (2015. A reflection of the Spanish woman with breast cáncer

    Directory of Open Access Journals (Sweden)

    Clara PERALTA NUENO

    2017-12-01

    Full Text Available Ma ma (2015 is a Spanish drama film directed by Julio Medem and produced by Morena Films. This film tells the story of Magda’s life, whose character is interpreted by Penélope Cruz. After being diagnosed with a breast cancer, Magda, an unemployed teacher, will not know how to act nor how this disease will change her life. But little by little, she will bring into the surface all her vital energy. Breast cancer represents the most frequent type of cancer among women. Although the majority of the identified risk factors can be modified, the health systems focus on activities that let strengthen the primary prevention and activities of secondary and tertiary prevention. The early detection and the right treatment are essential to fight against this disease. The emotional process caused by the presence of cancer involves a mechanism of psychic reconstitution that allows the patient develop an answer to the organic, cognitive, social, and emotional challenges they have to deal with. This process is easier when they have a solid socio-family support network among other factors.

  16. Don Quijote y Sancho Panza: duelo hiperbólico

    Directory of Open Access Journals (Sweden)

    María Stoopen

    2015-06-01

    Full Text Available Mientras don Quijote queda en Sierra Morena haciendo penitencia de amor por Dulcinea, Sancho Panza se encamina al Toboso a entregar a la amada una carta del caballero (Quijote I, 25. El escudero conoce ya la verdadera identidad de la señora que inspira los actos de su amo, “la moza labradora” Aldonza Lorenzo. El hecho de que Sancho no llegue al Toboso, y en consecuencia no vea nunca a la doncella ni le entregue ninguna carta, suscita en la descripción posterior que hace a su amo una serie de invenciones degradantes sobre la identidad de la joven construidas por el labrador a partir del imaginario rural. Se establece así un duelo hiperbólico de doble signo en donde don Quijote se ve forzado a adaptar las imágenes con que Sancho describe a Aldonza-Dulcinea, que no corresponden al ideal amoroso con que concibe a su amada (Quijote I, 30-31. Haré aquí un análisis de los recursos persuasivos que cada protagonista utiliza y del choque semántico que se establece a partir de los códigos de referencia de uno y otro. Asimismo, consideraré las consecuencias de estos episodios en la relación entre amo y escudero y la degradación creciente que sufre la imagen de la amada del caballero, gracias al poder discursivo de Sancho Panza.

  17. Developmental dysplasia of the hip in female adult individual: Site Tres Cruces I, Salta, Argentina (Superior formative period, 400-1000 AD).

    Science.gov (United States)

    Plischuk, Marcos; De Feo, María Eugenia; Desántolo, Bárbara

    2018-03-01

    Developmental dysplasia of the hip (DDH) is a developmental defect that prevents normal articulation between the acetabulum and the femoral head. This is an unusual condition, with a prevalence of 1-2 per thousand, and with only two poorly described skeletons documented in South American paleopathological literature. In this work we report an individual with such a condition, from the archeological site Tres Cruces I (Quebrada del Toro, Salta, Argentina). Several radiocarbon dates and associated materials date it to the Superior Formative (400-1000 AD). The remains are of an adult female, who also has tabular oblique cranial modification. Through detection of abnormalities in the morphology of the femora and ossa coxae, a differential diagnosis was carried out. On the left hip joint the formation of a well-defined false acetabulum, without connection with the true one, was observed. The latter was shallow, triangular, with an irregular base. The left os coxae showed a wider greater sciatic notch angle. The right os coxae exhibited a false acetabulum connected with the true one. Both femora presented a small femoral head, flat and mushroom-shaped, with shortening of the neck. These features were more pronounced on the right-side elements. On the basis of the aforementioned, a presumptive diagnosis of bilateral developmental dysplasia of the hip with complete dislocation on both sides was established. Copyright © 2017 Elsevier Inc. All rights reserved.

  18. Brachyplatystom a promagdalena, new species, a fossil goliath catfish (Siluriformes: Pimelodidae from the Miocene of Colombia, South America

    Directory of Open Access Journals (Sweden)

    John G. Lundberg

    Full Text Available A fossil Weberian complex of a large pimelodid catfish from the middle Miocene La Venta fauna of central Colombia originally identified as Brachyplatystoma sp. is described as a new, extinct species. Brachyplatystoma promagdalena, new species, is diagnosed by three autapomorphic characters: fifth centrum with a massive midventral expansion containing deep cavities and heavy ridges; first and compound centra contribute to a pair of prominent anterolateral processes before the ventral ends of the ossa suspensoria; and compound centrum with an anteriorly concave low ridge crossing its ventral surface posterior to aortic canal foramen. Brachyplatystoma promagdalena is compared to modern congeneric species and placed in the subgenus Malacobagrus with B. filamentosum, B. capapretum and B. rousseauxii. This group is characterized by synapomorphies of the texture and form of the first vertebra; texture and form of the dorsal side of the fourth transverse process; and presence of a bony gas bladder platform on the ventral side of the fourth transverse process. Today Brachyplatystoma ranges widely across the lowland Orinoco and Amazon and some river basins of the Guianas. The genus does not occur west or north of the Andes or Venezuelan coastal ranges. The Miocene species of Brachyplatystoma signals the former large river and biotic connection between the paleo-Amazonas-Orinoco system and central Colombia, a region now drained by the río Magdalena. Other fossils of aquatic vertebrates from the La Venta fauna show this same biogeographic relationship.

  19. Magnetic resonance imaging for the wrist joint of the coal miners in vibration department

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, X.Z.; Liu, R.L.; Hu, S.D.; Zhang, W.; Xu, W.X.; Ge, L.X. [Central Hospital of Zaozhuang Mine Corporation, Zaozhuang (China)

    2006-04-15

    To study the magnetic resonance imaging (MRI) in the wrist joint of coal miners who work in excavation and vibration department. Forty-three coal miners with the hand-arm vibration disease served as the observation group while 20 workers who were not working in the vibration department acted as the control group. The patients in the observation group were divided into five subgroups according to the time when they received vibration. The regularity of the development of signs and symptoms of MRI was observed and analyzed. The hydroarthrosis was most found in MRI. There were significant difference in hydroarthrosis osteoporosis and osteomyelitis between the observation group and the control group. The edema of bone marrow and the avascular necrosis of ossa carpi were found only in the observation group and not found in the control group. The hydroarthrosis and the edema of bone marrow occurred most in the early stage of vibration. The signal in the edema of the bone marrow of the distal end of the radius was decreased in the GE sequence with the specificity. Changes in the wrist joint occur in the early stage of the vibration work, and can be found in the MRI. The edema of the bone marrow of the distal end of the radius is of great value in the diagnosis of the hand-arm vibration disease.

  20. Padrão de sensibilidade de 117 amostras clínicas de Staphylococcus aureus isoladas em 12 hospitais In vitro antimicrobial susceptibility of 117 clinical isolates of Staphylococcus aureus from 12 hospitals

    Directory of Open Access Journals (Sweden)

    W.V.L. Farias

    1997-09-01

    Full Text Available OBJETIVO. Avaliar o padrão de sensibilidade in vitro de amostras clínicas de Staphylococcus aureus sensíveis (OSSA e resistentes à oxacilina (ORSA a outros antimicrobianos que podem ser utilizados no tratamento de infecções estafilocócicas. MATERIAL E MÉTODO. Foram analisadas 117 amostras clínicas de S. aureus isoladas em vários hospitais de São Paulo. Também foram incluídas amostras isoladas em Campinas, SP, e João Pessoa, PB. A avaliação da sensibilidade in vitro aos antimicrobianos foi realizada pela técnica de microdiluição em caldo, utilizando os procedimentos preconizados pelo National Committee for Clinical Laboratory Standards (NCCLS. Foi avaliada a concentração inibitória mínima (MIC para 24 antimicrobianos da classe dos beta-lactâmicos, fluoroquinolonas, aminoglicosídeos, glicopeptídeos, macrolídeos, lincosaminas e estreptograminas. Foram avaliadas tanto drogas disponíveis comercialmente quanto as que ainda se encontram em fase de pesquisa. A resistência cruzada entre dez fluoroquinolonas foi avaliada em 24 amostras. RESULTADOS. Os glicopeptídeos, o RP-59500 e a mupirocina foram os antimicrobianos que apresentaram maior atividade in vitro contra amostras de ORSA (100% sensibilidade. Oitenta e sete por cento das amostras de OSSA foram sensíveis à ciprofloxacina (MIC50 0,25mig/mL, enquanto que, para os ORSA, a sensibilidade foi de apenas 38% (MIC50 >4mig/mL. A resistência cruzada para as fluoroquinolonas foi observada mesmo para drogas não disponíveis comercialmente. As fluoroquinolonas que permaneceram ativas contra amostras resistentes à ciprofloxacina (clinafloxacina e WIN-57.273 apresentaram MICs 8 a 64 vezes mais elevados que as amostras sensíveis à ciprofloxacina, sugerindo que, quando lançadas na prática clínica, esses MICs possam se elevar ainda mais, inviabilizando o uso clínico desses compostos. CONCLUSÃO. Os resultados do presente estudo mostraram uma alta taxa de resistência a

  1. The würmian mammalian fauna of Grotta Barbara (Monte Circeo: palaeoeconomical and environment conditions data / La mammalofauna würmiana di Grotta Barbara (Monte Circeo: implicazioni paleoeconomiche e paleoambientali

    Directory of Open Access Journals (Sweden)

    Lucia Caloi

    1989-07-01

    Full Text Available Abstract A fossil fauna composed predominantly by red deer, and also containing fallow-deer and steinbock was examined. It comes from late-Mousterian levels at Grotta Barbara, and is correlated with the first moderately cold oscillations of palaeotemperature stage 3. The analysis of the remains suggests that: a among cervids, young and females were preferentially hunted; b butchering was performed mainly in the cave; c the bones were crushed in order to extract the marrow and, less frequently, the fat. Riassunto Viene esaminata una fauna a cervo dominante, daino e stambecco, proveniente dai livelli a industria tardo-musteriana di Grotta Barbara. L'associazione viene riferita alle prime oscillazioni moderatamente fredde dello stadio 3 della scala isotopica. L'analisi dei resti consente di ipotizzare che: a la caccia era rivolta in prevalenza a femmine giovani; b la macellazione avveniva prevalentemente in grotta; c le ossa erano frantumate al fine di estrarne il midollo e, meno frequentemente, il grasso.

  2. OSI in the NASA science internet: An analysis

    Science.gov (United States)

    Nitzan, Rebecca

    1990-01-01

    The Open Systems Interconnection (OSI) protocol suite is a result of a world-wide effort to develop international standards for networking. OSI is formalized through the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). The goal of OSI is to provide interoperability between network products without relying on one particular vendor, and to do so on a multinational basis. The National Institute for Standards and Technology (NIST) has developed a Government OSI Profile (GOSIP) that specified a subset of the OSI protocols as a Federal Information Processing Standard (FIPS 146). GOSIP compatibility has been adopted as the direction for all U.S. government networks. OSI is extremely diverse, and therefore adherence to a profile will facilitate interoperability within OSI networks. All major computer vendors have indicated current or future support of GOSIP-compliant OSI protocols in their products. The NASA Science Internet (NSI) is an operational network, serving user requirements under NASA's Office of Space Science and Applications. NSI consists of the Space Physics Analysis Network (SPAN) that uses the DECnet protocols and the NASA Science Network (NSN) that uses TCP/IP protocols. The NSI Project Office is currently working on an OSI integration analysis and strategy. A long-term goal is to integrate SPAN and NSN into one unified network service, using a full OSI protocol suite, which will support the OSSA user community.

  3. SITUACiÓN ACTUAL Y PERSPECTIVAS DE LA INTEGRACIÓN CENTROAMERICANA

    Directory of Open Access Journals (Sweden)

    José Miguel Alfaro; Alvaro de la Ossa Haroldo Rodas; Olga Marta Sánchez

    2012-10-01

    Full Text Available En la presente mesa redonda analizaremos las alternativas de integración. Así a partir de la cita presidencial en Antigua Guatemala, en 1990, hay un nuevo tema para analizar, discutir y proyectar. Es eso lo que da marco a este evento académico, en donde pretendemos hacer un balance y proyectar perspectivas de la integración centroamericana. Nuestros tres expositores analizarán, desde su propia perspectiva, las condiciones, ritmos, actores y posibilidades de estas tendencias históricas del presente. Vamos a iniciar de esta forma, la mesa redonda como un marco académico al importante evento que hoy celebramos, de firma de un convenio con la Facultad Latinoamericana de Ciencias Sociales. De acuerdo con los señores expositores, vamos a iniciar con la exposición del Sr. José Miguel Alfaro, posteriormente daríamos la palabra a don Alvaro de la Ossa y finalizaría el Dr. Haroldo Rodas. Ellos tendrán entre 15 y 20 minutos para hacer sus exposiciones. Posteriormente pasaríamos a una fase de diálogo abierto con las distinguidas personas que nos acompañan en la noche de hoy.

  4. Constraining the Late Mesozoic and Early Tertiary Tectonic Evolution of Southern Mexico: Structure and Deformation History of the Tierra Caliente Region.

    Science.gov (United States)

    Cabral-Cano; Draper; Lang; Harrison

    2000-07-01

    We analyze the structure and assess the deformation history of the Tierra Caliente Metamorphic Complex (TCMC) of southern Mexico, where Laramide accretion of exotic terranes is in debate. The TCMC consists of a south-plunging antiform fault that is bounded on both its eastern and western flanks. Tierra Caliente Metamorphic Complex rocks show at least two phases of compressional deformation. The first and most prominent records a mean tectonic transport direction of 068 degrees. This phase is responsible for east-verging asymmetrical folding and thrusting of both metamorphic and superjacent sedimentary rocks. The second phase has an average transport direction of 232 degrees and is restricted to the western portion of the TCMC. A third phase is responsible for normal faulting. Lack of discernible deformation before Late Cretaceous time indicates that the main deformation phase is coincident with Laramide orogenesis elsewhere in the North American Cordillera. The stratigraphy, structure, and deformational history of the TCMC do not require accretion of exotic terranes. We explain the Mesozoic tectonostratigraphic evolution of the TCMC in terms of deposition and deformation of Mesozoic volcanic and sedimentary strata over the attenuated continental crust of the North American plate.

  5. Antecedence of the Yarlung-Siang-Brahmaputra River, eastern Himalaya

    Science.gov (United States)

    Lang, Karl A.; Huntington, Katharine W.

    2014-07-01

    At the eastern terminus of the Himalayan orogen, distortion and capture of southeast Asian drainage basins reflects regional patterns of crustal strain due to the indentation of the Indian Plate into Eurasia. After flowing eastward >1000 km along the southern margin of Tibet, the Yarlung-Siang-Brahmaputra River turns abruptly southward through the eastern Himalayan syntaxis rapidly exhuming a crustal scale antiform in an impressive >2 km knickpoint. This conspicuous drainage pattern and coincidence of focused fluvial incision and rapid rock exhumation has been explained by the capture of an ancestral, high-elevation Yarlung River by headward erosion of a Himalayan tributary. However, recent observation of Tibetan detritus in Neogene foreland basin units complicates this explanation, requiring a connection from Tibet to the foreland prior to the estimated onset of rapid rock exhumation. We constrain the sedimentary provenance of foreland basin units deposited near the Brahmaputra River confluence in the eastern Himalayan foreland basin using detrital zircon U-Pb geochronology. We interpret the significant presence of Gangdese-age detritus in each foreland basin unit to indicate that connection of the Yarlung-Siang-Brahmaputra River was established during, or prior to foreland deposition in the Early Miocene. Our results indicate that connection of the Yarlung-Siang-Brahmaputra River precedes exhumation of the syntaxis, demonstrating the potential for the progressive coevolution of rock uplift and rapid erosion of the Namche Barwa massif.

  6. FT-IR spectra of the anti-HIV nucleoside analogue d4T (Stavudine). Solid state simulation by DFT methods and scaling by different procedures

    Science.gov (United States)

    Alcolea Palafox, M.; Kattan, D.; Afseth, N. K.

    2018-04-01

    A theoretical and experimental vibrational study of the anti-HIV d4T (stavudine or Zerit) nucleoside analogue was carried out. The predicted spectra in the three most stable conformers in the biological active anti-form of the isolated state were compared. Comparison of the conformers with those of the natural nucleoside thymidine was carried out. The calculated spectra were scaled by using different scaling procedures and three DFT methods. The TLSE procedure leads to the lowest error and is thus recommended for scaling. With the population of these conformers the IR gas-phase spectra were predicted. The crystal unit cell of the different polymorphism forms of d4T were simulated through dimer forms by using DFT methods. The scaled spectra of these dimer forms were compared. The FT-IR spectrum was recorded in the solid state in the 400-4000 cm-1 range. The respective vibrational bands were analyzed and assigned to different normal modes of vibration by comparison with the scaled vibrational values of the different dimer forms. Through this comparison, the polymorphous form of the solid state sample was identified. The study indicates that d4T exist only in the ketonic form in the solid state. The results obtained were in agreement with those determined in related anti-HIV nucleoside analogues.

  7. Fatti dello Studio Bentivoglio

    Directory of Open Access Journals (Sweden)

    Pasquale Fameli

    2015-12-01

    Full Text Available In the late sixties a group of artists formed in Palazzo Bentivoglio in Bologna joined to new conceptual-behavioral frontiers, in turn summarized under the partial labels Antiform, Arte Povera and Body Art. The situation in Bologna takes on connotations entirely singular, mainly for having found its wellspring in Vasco Bendini, from Informal movement, who became brilliant forerunner of many of the most advanced solutions and features of the new art season. For a few but intense years Studio Bentivoglio becomes therefore the heart of the new fertile aesthetic research, counting among its leaders now prominent personalities such as Pier Paolo Calzolari and Luigi Ontani. The essay will reconstruct the events of those years in Bologna through the works and documents remained of, placing comparisons with the contemporary proposals, and referring not only to the poetics of various artists, but also to the critical voices – not least that of Francesco Arcangeli – who, with insight and boldness, were able to understand and comment on the changes of expression then in place.

  8. Strata-bound copper-iron sulfide mineralization in a Proterozoic front arc setting at Boksputs, Northwest Cape, South Africa — a possible Besshi-type deposit

    Science.gov (United States)

    Geringer, G. J.; Pretorius, J. J.; Cilliers, F. H.

    1987-04-01

    A low-grade, copper-iron sulfide deposit is present at Boksputs in the Northwest Cape, South Africa. It occurs in the Proterozoic amphibolite belt, the Areachap Group, along the eastern margin of the Namaqua mobile belt. The mineralization, which is dominated by pyrite, chalcocopyrite, sphalerite, and magnetite, occurs as disseminated ore and thin layers of massive-type ore in the lower massive amphibiolite and associated amphibole gneisses of the Kraalkop antiform and synform. Chemically, the host-rock amphibolite resembles low-K arc tholeiite and calc-alkaline volcanics, whereas the upper amphibolite is calc-alkaline. The sulfide mineralization and the host-rock composition is explained in terms of modern plate tectonic principles. It is concluded that the Boksputs mineralization is a syngenetic, strata-bound, copper-iron deposit which to some extend resembles Besshi-type deposits. It is associated with low-K arc tholeiite which is tectonically related to a front arc environment or a rifted arc system along the eastern margin of the Namaqua mobile belt.

  9. Metallogenetic modeling for uranium exploration in rocks of the Abaira-Jussiape Anticlinal nucleus, Chapada Diamantina, Bahia; Modelagem metalogenetica para prospeccao de uranio nas rochas do nucleo da Anticlinal Abaira-Jussiape, Chapada Diamantina, Bahia

    Energy Technology Data Exchange (ETDEWEB)

    Santana, Jocilene dos Santos; Cruz, Simone Cerqueira Pereira; Barbosa, Johildo Salomao Figueiredo [Universidade Federal da Bahia (PPGG/UFBA), Salvador, BA (Brazil); Abram, Maisa Bastos; Martins, Adriano Alberto Marques, E-mail: jocilenesanttana@yahoo.com.br, E-mail: simonecruzufba@gmail.com, E-mail: johildo@cpgg.ufba.br, E-mail: maisa.abram@cprm.gov.br, E-mail: adriano1952@gmail.com [Companhia de Pesquisas de Recursos Minerais (CPRM), Salvador, BA (Brazil). Superintendencia Regional de Salvador. Servico Geologico do Brasil

    2011-06-15

    The NNW-SSE-trending Abaira-Jussiape Anticlinal is an antiformal culmination of folding and shearing in the Paramirim Corridor of the Western Chapada Diamantina. In its core paleoproterozoic, mylonitized Caraguatai Suite, tonalites-granodiorites, alkali-feldspar granites, syenites to quartz-syenites and Jussiape Suite granites crop out. Compressional and distensional stresses mark the structural geology of the area. The compressional structures are related to two distinct deformation phases, named D1a and D1b. The main compressional phase is ductile D1a, which is related to the nucleation of dextral to dextral-reverse shearing zones. Deformation and syn-D1a recrystallization involving plagioclase and the K-feldspar suggest deformation temperature conditions above 550 deg C. The following phase D2 is of ductilebrittle nature and culminates in reverse shearing zones. The distensional structures correspond to the D3 phase and are represented by frontal shear zones with normal movement. The petrographic study helped identify a pre-D1a hydrothermal alteration process related to albitization and potassification, syn-D1 oxidation process, and hydration and saussuritization related to phases D2 and D3. The integration of lithological, petrographic, structural and geophysical data by means of the logic Fuzzy, plus the existing information regarding structural and lithologic controls of the known uranium mineralization in the Paramirim Corridor, led us to identify two promising areas for radioactive element exploration in the nucleus of Abaira-Jussiape Anticlinal. (author)

  10. Virginia Regional Seismic Network. Final report (1986--1992)

    Energy Technology Data Exchange (ETDEWEB)

    Bollinger, G.A.; Sibol, M.S.; Chapman, M.C.; Snoke, J.A. [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (US). Seismological Observatory

    1993-07-01

    In 1986, the Virginia Regional Seismic Network was one of the few fully calibrated digital seismic networks in the United States. Continued operation has resulted in the archival of signals from 2,000+ local, regional and teleseismic sources. Seismotectonic studies of the central Virginia seismic zone showed the activity in the western part to be related to a large antiformal structure while seismicity in the eastern portion is associated spatially with dike swarms. The eastern Tennessee seismic zone extends over a 300x50 km area and is the result of a compressive stress field acting at the intersection between two large crustal blocks. Hydroseismicity, which proposes a significant role for meteoric water in intraplate seismogenesis, found support in the observation of common cyclicities between streamflow and earthquake strain data. Seismic hazard studies have provided the following results: (1) Damage areas in the eastern United States are three to five times larger than those observed in the west. (2) Judged solely on the basis of cataloged earthquake recurrence rates, the next major shock in the southeast region will probably occur outside the Charleston, South Carolina area. (3) Investigations yielded necessary hazard parameters (for example, maximum magnitudes) for several sites in the southeast. Basic to these investigations was the development and maintenance of several seismological data bases.

  11. Modelling of seismic reflection data for underground gas storage in the Pečarovci and Dankovci structures - Mura Depression

    Directory of Open Access Journals (Sweden)

    Andrej Gosar

    1995-12-01

    Full Text Available Two antiform structures in the Mura Depression were selected as the most promising in Slovenia for the construction of an underground gas storage facility in an aquifer. Seventeen reflection lines with a total length of 157km were recorded, and three boreholes were drilled. Structural models corresponding to two different horizons (the pre-Tertiary basement and the Badenian-Sarmatianboundary were constructed using the Sierra Mimic program. Evaluation of different velocity data (velocity analysis, sonic log, the down-hole method, and laboratory measurements on cores was carried out in order to perform correct timeto-depth conversion and to estabUsh lateral velocity variations. The porous rock in Pečarovci structure is 70m thick layer of dolomite, occurring at a depth of 1900m, whereas layers of marl, several hundred meter thick, represent the impermeable cap-rock. Due to faults, the Dankovci structure, at a depth of 1200m,where the reservoir rocks consist of thin layers of conglomerate and sandstone,was proved to be less reliable. ID synthetic seismograms were used to correlatethe geological and seismic data at the borehole locations, especially at intervals with thin layers. The raytracing method on 2D models (the Sierra Quik packagewas applied to confirm lateral continuity of some horizons and to improve the interpretation of faults which are the critical factor for gas storage.

  12. The conjunction of factors that lead to formation of giant gold provinces and deposits in non-arc settings

    Directory of Open Access Journals (Sweden)

    David I. Groves

    2016-05-01

    In contrast to their province scale similarities, the different giant gold deposit styles show contrasting critical controls at the district to deposit scale. For orogenic gold deposits, the giants appear to have formed by conjunction of a greater number of parameters to those that control smaller deposits, with resultant geometrical and lithostratigraphic complexity as a guide to their location. There are few giant IRGS due to their inferior fluid-flux systems relative to orogenic gold deposits, and those few giants are essentially preservational exceptions. Many Carlin-type deposits are giants due to the exceptional conjunction of both structural and lithological parameters that caused reactive and permeable rocks, enriched in syngenetic gold, to be located below an impermeable cap along antiformal “trends”. Hydrocarbons probably played an important role in concentrating metal. The supergiant Post-Betze deposit has additional ore zones in strain heterogeneities surrounding the pre-gold Goldstrike stock. All unequivocal IOCG deposits are giant or near-giant deposits in terms of gold-equivalent resources, partly due to economic factors for this relatively poorly understood, low Cu-Au grade deposit type. The supergiant Olympic Dam deposit, the most shallowly formed deposit among the larger IOCGs, probably owes its origin to eruption of volatile-rich hybrid magma at surface, with formation of a large maar and intense and widespread brecciation, alteration and Cu-Au-U deposition in a huge rock volume.

  13. Acoustic analysis and speech intelligibility in patients wearing conventional dentures and rugae incorporated dentures.

    Science.gov (United States)

    Adaki, Raghavendra; Meshram, Suresh; Adaki, Shridevi

    2013-12-01

    Phonetics is an important function of oral cavity. It has been overlooked quite frequently while fabricating the complete dentures. In this study modification of anterior palatal surface of denture is done and assessed for its impact on phonetics. Purpose is to assess acoustic and speech intelligibility analysis in edentulous patients and also to evaluate the influence of conventional dentures, arbitrary rugae and customized rugae dentures on speech in complete denture wearers. Ten healthy edentulous patients 55-70 years of age were selected for the study. Dentures were fabricated in conventional way for these patients. Recordings were done for intelligibility and acoustic analysis of the speech. Recordings were done without denture, with conventional denture, with arbitrary rugae denture, with customized rugae denture. Each recording was done at an interval of 10 days period. All four recordings were analyzed and comparison was done using paired 't' test. There was significant improvement in frequency peak noise energy for 's', antiformant frequency for 'n' in rugae incorporated dentures. There was relative improvement in frequency peak noise energy for 'sh', frequency proximity burst, voice onset time for 'd', with rugae incorporated dentures. Findings of intelligibility analysis have shown substitution errors with conventional dentures. There was relative improvement of speech with rugae incorporated dentures. Among these, customized rugae dentures showed better results than arbitrary rugae dentures.

  14. Deformation mechanisms in the frontal Lesser Himalayan Duplex in Sikkim Himalaya, India

    Science.gov (United States)

    Matin, Abdul; Mazumdar, Sweety

    2009-08-01

    Understanding deformation mechanisms in Himalayan rocks is a challenging proposition due to the complex nature of the deformed rocks and their genesis. Crustal deformation in the Himalayan thrust belt typically occurs in elastico-frictional (EF) or quasi-plastic (QP) regimes at depths controlled mainly by regional strain-rate and geothermal gradient. However, material property, grain-size and their progressive changes during deformation are also important controlling factors. We present evidence of EF deformation from Gondwana rocks developed during the emplacement of one of the frontal horses (Jorthang horse) in the Lesser Himalayan Duplex (LHD) structure associated with Lesser Himalayan rocks in the footwall of the Ramgarh thrust in the Rangit window near Jorthang in the Sikkim Himalaya. The rocks in the horse exhibit systematic changes in microand meso-structures from an undeformed protolith to cataclasite suggesting that it was emplaced under elastico-frictional conditions. Meso- to micro-scale shear fractures are seen developed in Gondwana sandstone and slate while intercalated fine-grained shale-coal-carbonates are deformed by cataclastic flow suggesting that material property and grain-size have played an important role in the deformation of the Jorthang horse. In contrast, the hanging wall schists and quartzites of the Ramgarh thrust exhibit quasi-plastic deformation structures. This suggests that the Jorthang horse was emplaced under shallower crustal conditions than the antiformally folded Ramgarh thrust sheet even though the Ramgarh sheet presently overlies the Jorthang horse.

  15. Understanding human movement through spatial technologies. The role of natural areas of transit in the Late Prehistory of South-western Iberia

    Directory of Open Access Journals (Sweden)

    Murrieta-Flores, Patricia

    2012-06-01

    Full Text Available Archaeological, historical, and ethnographic research has demonstrated how mountainous environments influence the socio-cultural dynamics of the communities that live in them and in their neighbouring areas. The development of these communities tends to occur at the margins, often far away from centres of political power. This marginality is also extended to movement in these regions, where mountain ranges regularly constitute mighty obstacles on account of their natural configuration which plays a central role in strategy, commerce and travelling. In the case of western Sierra Morena in Spain, its constitution shaped both the ways of transit through the mountains during Later Prehistory and the historical routes of communication that traverse Andalucía. Using a GIS methodology developed specifically to identify particular characteristics of the landscape relevant to human movement, such as passageways, crossing points, and natural areas of transit, we examine the role that natural accessibility had for the late prehistoric societies of this region. We conclude that the location of their habitats and symbolic places are strongly related to corridors, possibly due to an increasing importance of herding activities.

    Investigaciones arqueológicas, históricas y etnográficas han demostrado como los ambientes de montaña tienen una profunda influencia en las dinámicas socioculturales de las comunidades que viven en ellos y en sus áreas vecinas. El desarrollo de estas sociedades tiende a producirse en los márgenes, usualmente lejos de los centros de poder político. Esta marginación se extiende también a la circulación en estas regiones, donde las cordilleras suelen constituir poderosos obstáculos debido a su configuración natural que juega un papel central en sus estrategias, comercio y movimiento humano. Durante la Prehistoria Reciente, la constitución de Sierra Morena Occidental (España moldeó tanto las vías de tránsito a trav

  16. Assessment of crown fire initiation and spread models in Mediterranean conifer forests by using data from field and laboratory experiments

    Energy Technology Data Exchange (ETDEWEB)

    Rodríguez y Silva, F.; Guijarro, M.; Madrigal, J.; Jiménez, E.; Molina, J.R.; Hernando, C.; Vélez, R.; Vega, J.A.

    2017-11-01

    Aims of study: To conduct the first full-scale crown fire experiment carried out in a Mediterranean conifer stand in Spain; to use different data sources to assess crown fire initiation and spread models, and to evaluate the role of convection in crown fire initiation. Area of study: The Sierra Morena mountains (Coordinates ETRS89 30N: X: 284793-285038; Y: 4218650-4218766), southern Spain, and the outdoor facilities of the Lourizán Forest Research Centre, northwestern Spain. Material and methods: The full-scale crown fire experiment was conducted in a young Pinus pinea stand. Field data were compared with data predicted using the most used crown fire spread models. A small-scale experiment was developed with Pinus pinaster trees to evaluate the role of convection in crown fire initiation. Mass loss calorimeter tests were conducted with P. pinea needles to estimate residence time of the flame, which was used to validate the crown fire spread model. Main results: The commonly used crown fire models underestimated the crown fire spread rate observed in the full-scale experiment, but the proposed new integrated approach yielded better fits. Without wind-forced convection, tree crowns did not ignite until flames from an intense surface fire contacted tree foliage. Bench-scale tests based on radiation heat flux therefore offer a limited insight to full-scale phenomena. Research highlights: Existing crown fire behaviour models may underestimate the rate of spread of crown fires in many Mediterranean ecosystems. New bench-scale methods based on flame buoyancy and more crown field experiments allowing detailed measurements of fire behaviour are needed.

  17. Theletrum lamothei sp. nov. (Digenea, parasite of Echidna nocturna from Cuajiniquil, Guanacaste, and other digenes of marine fishes from Costa Rica

    Directory of Open Access Journals (Sweden)

    Gerardo Pérez-Ponce de León

    1998-06-01

    Full Text Available A new species of Theletrum is described from the intestine of two palenose morays, Echidna nocturna, collected in Cuajiniquil, Guanacaste Province, Costa Rica. The new species differs from the type species, T. fustiforme Linton, 1910 by having a subspherical pars prostatica, a subspherical seminal vesicle extending anteriorly to the anterior border of the acetabulum, by the presence of a poorly developed hermaphroditic sac, and by having a larger body size. We also report eight additional species of digeneans parasitizing marine fishes in several localities along the Atlantic and Pacific coast of Costa Rica: Bianium simonei, Didymozoinae (metacercariae, Ectenurus virgulus, Hypocreadium myohelicatum, Lecithochirium microstomum, Pseudolecithaster sp., Stephanostomum casum, and Tergestia laticollis. In addition, we present an updated list of helminth parasites of marine fish from Costa Rica and discuss the importance of including parasites as an integral part of biodiversity inventories.Se describe una especie nueva de digéneo del género Theletrum, parásito del intestino de una "morena pecosa", Echidna nocturna, recolectada en Playa Cuajiniquil, Provincia de Guanacaste, Costa Rica. La nueva especie es diferente de T. fustiforme Linton, 1910, la especie tipo, por presentar una pars prostatica subesférica, una vesícula seminal subesférica que se extiende hasta el borde anterior del acetábulo, por la presencia de un saco hermafrodita y por una mayor longitud del cuerpo. También se registran ocho especies adicionales de digéneos parásitos de peces marinos en varias localidades de las costas del Atlántico y del Pacífico de Costa Rica. Por último, presentamos una lista actualizada de los helmintos parásitos de peces marinos y dulceacuícolas de Costa Rica y discutimos la importancia de incluir a los parásitos como una parte integral de las investigaciones sobre biodiversidad.

  18. SAFA: A new measure to evaluate psychiatric symptoms detected in a sample of children and adolescents affected by eating disorders. Correlations with risk factors

    Directory of Open Access Journals (Sweden)

    Emilo Franzoni

    2009-03-01

    Full Text Available Emilo Franzoni1, Morena Monti1, Alessandro Pellicciari1, Carlo Muratore1, Alberto Verrotti3, et al1Child Neuropsychiatry Unit, Clinical Pediatrics; 2Protection and Enhancement Department, University of Bologna, Italy; 3Clinic of Paediatrics, University of Chieti, Chieti, ItalyAbstract: In order to evaluate the psychiatric symptoms associated with a diagnosis of eating disorders (ED we have administered a new psychometric instrument: the Self Administrated Psychiatric Scales for Children and Adolescents (SAFA test. SAFA was administered to a cohort of 97 patients, aged from 8.8 to 18, with an ED diagnosis. Age, body mass index (BMI and BMI standard deviation score were analyzed. Furthermore, while looking for linkable risk factors, we evaluated other data that took an influence over the SAFA profile, like parental separation and family components’ number. Compared to the range of statistical normality (based on Italian population, patients with bulimia nervosa or binge-eating disorder showed higher and pathologic values in specific subscales. When analyzing sex, males showed more pathologic values in most anxiety-related, obsessiveness–compulsiveness-related and insecurity subscales. A correlation among age, BMI and specific subscales (low self esteem, psychological aspects emerged in participants with anorexia nervosa. In order to plan more appropriate diagnostic and therapeutic approaches in children or adolescents suffering from ED, the SAFA test can be an important instrument to evaluate psychiatric symptoms. Therefore, we propose to include this useful, simple self-administered test as a new screening tool for ED diagnosis. Keywords: psychiatric comorbidity, anorexia nervosa, bulimia nervosa, binge-eating disorder, SAFA test

  19. Population genetics after fragmentation: the case of the endangered Spanish imperial eagle (Aquila adalberti).

    Science.gov (United States)

    Martinez-Cruz, B; Godoy, J A; Negro, J J

    2004-08-01

    The highly endangered Spanish imperial eagle, Aquila adalberti, has suffered from both population decline and fragmentation during the last century. Here we describe the current genetic status of the population using an extensive sampling of its current distribution range and both mitochondrial control region sequences and nuclear microsatellite markers. Results were evaluated in comparison to those obtained for the Eastern imperial eagle, Aquila heliaca, its nearest extant relative. Mitochondrial haplotype diversity was lower in the Spanish than in the Eastern species whereas microsatellite allelic richness and expected heterozygosity did not differ. Both allelic richness and expected heterozygosity were lower in the small Parque Nacional de Doñana breeding nucleus compared to the remaining nuclei. A signal for a recent genetic bottleneck was not detected in the current Spanish imperial eagle population. We obtained low but significant pairwise FST values that were congruent with a model of isolation by distance. FST and exact tests showed differentiation among the peripheral and small Parque Nacional de Doñana population and the remaining breeding subgroups. The centrally located Montes de Toledo population did not differ from the surrounding Centro, Extremadura and Sierra Morena populations whereas the latter were significantly differentiated. On the other hand, a Bayesian approach identified two groups, Parque Nacional de Doñana and the rest of breeding nuclei. Recent migration rates into and from Parque Nacional de Doñana and the rest of breeding nuclei were detected by assignment methods and estimated as 2.4 and 5.7 individuals per generation, respectively, by a Bayesian approach. We discuss how management strategies should aim at the maintenance of current genetic variability levels and the avoidance of inbreeding depression through the connection of the different nuclei. Copyright 2004 Blackwell Publishing Ltd

  20. La selección de las/los candidatos/as a diputados/as federales: El caso de Tlaxcala durante el proceso electoral 2015

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    María Magdalena Sam Bautista

    2017-01-01

    Full Text Available El propósito del artículo es realizar un análisis del proceso de selección de las candidaturas a diputados/as federales por parte del Partido Acción Nacional (PAN, el Partido Revolucionario Institucional (PRI, el Partido del Trabajo (PT y el Movimiento de Regeneración Nacional (MORENA en el estado de Tlaxcala, buscando describir la formalidad de la elección de los candidatos de acuerdo a las reglas partidistas, así como el examen de los posibles conflictos, alianzas, compromisos, negociaciones y acuerdos acaecidos en dicho proceso. El marco de reflexión del tema es el aún vigente planteamiento sobre la transición política mexicana y si esto ha sido posible al interior de los partidos, o si se trata sólo de una recomposición de los grupos políticos y/o clase política atendiendo a prácticas políticas de viejo cuño. Así, los resultados de la indagación a través de entrevistas, consultas hemerográficas y documentos institucionales, ayudarán a discutir de forma cualitativa con base en los datos empíricos de caso, hasta qué punto y/o de qué forma dicha transición política ha sido efectiva o concretada y si ha abonado a la democracia mexicana y particularmente al trabajo interno de los propios partidos políticos. Lo anterior independientemente que desde la formalidad del proceso electivo, los resultados indican el triunfo del PRI como resultado de las elecciones del 2015.

  1. Los regímenes de tenencia indirectos en la agricultura andaluza: evolución y estado actual

    Directory of Open Access Journals (Sweden)

    Víctor O. Martín Martín

    2007-01-01

    Full Text Available Se expone una síntesis bibliográfica (con trabajo de campo y entrevistas para una interpretación teórica de las causas de la estabilidad del latifundio extensivo en el Sur de España. El artículo aporta una explicación de la génesis y evolución de los regímenes de tenencia indirectos de la tierra en la diversidad de los sistemas agrarios de Andalucía. Es decir, cómo se adapta la economía terrateniente a la nueva y singular realidad española surgida a partir de la reforma agraria liberal desde el punto de vista de la contratación de la mano de obra de sus predios en: a la dehesa de Los Pedroches, b la Sierra Morena, c el regadío del Valle del Guadalquivir, d los secanos de La Campiña y altiplanicies interiores y e los olivares de las Subbéticas. Durante décadas y hasta los años sesenta del siglo XX estas agriculturas andaluzas evolucionaron manteniendo el régimen contemporáneo de la economía terrateniente como producto de la combinación del sistema de pagos en trabajo o precapitalista y del capitalista. En los años sesenta se produce la crisis y readaptación de todos estos sistemas agrarios: sostendremos que desaparecen los regímenes de tenencia indirectos, pero se mantiene la gran propiedad latifundista mediante el control del poder político.

  2. Ma ma (2015: un reflejo de la mujer española con cáncer de mama

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    Clara Peralta?Nueno et al.

    2017-03-01

    Full Text Available Ma ma (2015 es una película de drama española dirigida por Julio Medem y producida por Morena Films. Esta película narra la historia de la vida de Magda cuyo personaje es interpretado por Penélope Cruz. Tras serle diagnosticado un cáncer de mama, Magda, una maestra en paro, no sabrá cómo actuar ni de qué manera cambiará esta enfermedad su vida, pero poco a poco sacará a la superficie toda su energía vital. El cáncer de mama representa el tipo de cáncer más frecuente en la mujer. Aunque la mayoría de los factores de riesgo identificados pueden ser modificables, los sistemas de salud se concentran en actividades que permiten fortalecer la prevención primaria y actividades de prevención secundaria y terciaria. La detección temprana y el tratamiento adecuado son indispensables para luchar contra esta enfermedad. El proceso emocional generado por la presencia de cáncer, conlleva un mecanismo de reconstitución psíquico que permite a la paciente conformar una respuesta a los desafíos orgánicos, cognitivos, sociales y emocionales a los cuales se ve enfrentada. Dicho proceso es favorecido entre otros factores por contar con una red de apoyo socio?familiar sólida.

  3. Cloisonné kidney in mouflon sheep (Ovis orientalis musimon

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    Hervás, J.

    2002-12-01

    Full Text Available This study describes a case of cloisonné kidney associated with infection by Babesia ovis in a wild mouflon (Ovis orientalis musimonj found dead in year in eastern Sierra Morena (Andalusia, Spain. The major macroscopic lesions were a icteric coloration in ocular and oral mucosa, and b dark metal coloration on the kidneys' external surface. Intense dark coloration alternating with intense greyish strips was observed on renal cortex sections. Blood samples were collected for haematological and parasitological analyses, as well as samples from various organs for histopathological examination. Infection by B. ovis was confirmed by using the Polymerase Chain Reaction test (PCR. Histopathological examination revealed tubulonephrosis associated with thickening of the basal membrane of the convoluted portions of the renal tubules (both proximal and distal, which took on an intense brownish pigmentation. These renal lesions have been described as "cloisonné" kidney. Cloisonné kidneys show uncommon coloring of the renal tubular system, associated with ferritin and hemosiderin deposits in these structures resulting from a chronic hemolitic process (hemoparasites, toxins, etc.. In our case, hemolitic phenomena are associated with infection by B. ovis. The seroprevalence of this hemoparasite in wild mouflon populations in other regions of Spain (Catalonia is up to 15%.

    [fr]
    Nous étudions un cas de rein cloisonné associé à l'infection par Babesia ovis sur un mouflon sauvage (Ovis orientalis musimon qui a été trouvé la même année dans la partie orientale de la Sierra Morena (Andalousie, Espagne. Les principales lésions macroscopiques étaient: a coloration ictérique sur les muqueuses oculaire et orale, et b coloration métallique foncée sur la partie extérieure du rein. Cette coloration foncée intense alternait avec des bandes grisâtres dans les sections du cortex rénal. Nous avons pris

  4. The Ups and Downs of extension-parallel folding: Stratigraphic evolution of a constrictional rift basin during oblique opening of the Gulf of California

    Science.gov (United States)

    Seiler, Christian; Quigley, Mark; Fletcher, John

    2013-04-01

    comparable along the length of the basin, indicating that different depositional environments were active at any one time. Importantly, the depocentre facies evolved progressively further upsection and thus later towards the southern Santa Rosa basin, where the detachment enters a broad synformal domain. Moreover, only the proximal (conglomeratic) fan facies developed in the eastern part of the basin, which lies adjacent to a major antiformal corrugation of the detachment. These relationships suggest that changes in the depositional environment are genetically linked to the corrugations of the detachment fault, which represent upright open folds that formed in the N-S constrictional strain regime of the transtensional plate boundary. The upward vertical deflection caused by antiformal folding led to increased uplift in both foot- and hanging wall, thereby choking the basin with coarse conglomerate and breccia. By comparison, the downward deflection in the synformal domain resulted in a lowering of the surface and the development of a well-established depocentre in the southern Santa Rosa basin.

  5. Constrictional strain during oblique rifting: A record from transtensional basins in the Gulf Extensional Province

    Science.gov (United States)

    Seiler, C.; Quigley, M.; Fletcher, J. M.

    2011-12-01

    comparable along the length of the basin, indicating that different depositional environments were active at any one time. Importantly, the depocentre facies evolved progressively further upsection and thus later towards the southern Santa Rosa basin, where the detachment enters a broad synformal domain. Moreover, only the proximal (conglomeratic) fan facies developed in the eastern part of the basin, which lies adjacent to a major antiformal corrugation of the detachment. These relationships suggest that changes in the depositional environment are genetically linked to the corrugations of the detachment fault, which represent upright open folds that formed in the N-S constrictional strain regime of the transtensional plate boundary. The upward vertical deflection caused by antiformal folding led to increased uplift in both foot- and hanging wall, thereby choking the basin with coarse conglomerate and breccia. By comparison, the downward deflection in the synformal domain resulted in a lowering of the surface and the development of a well-established depocentre in the southern Santa Rosa basin.

  6. Transverse tectonic structural elements across Himalayan mountain front, eastern Arunachal Himalaya, India: Implication of superposed landform development on analysis of neotectonics

    Science.gov (United States)

    Bhakuni, S. S.; Luirei, Khayingshing; Kothyari, Girish Ch.; Imsong, Watinaro

    2017-04-01

    mountain front along the Sesseri, Siluk, Siku, Siang, Mingo, Sileng, Dikari, and Simen rivers. At some such junctions, landforms associated with the active right-lateral strike-slip faults are superposed over the earlier landforms formed by transverse normal faults. In addition to linear transverse features, we see evidence that the fold-thrust belt of the frontal part of the Arunachal Himalaya has also been affected by the neotectonically active NW-SE trending major fold known as the Siang antiform that again is aligned transverse to the mountain front. The folding of the HFT and MBT along this antiform has reshaped the landscape developed between its two western and eastern limbs running N-S and NW-SE, respectively. The transverse faults are parallel to the already reported deep-seated transverse seismogenic strike-slip fault. Therefore, a single take home message is that any true manifestation of the neotectonics and seismic hazard assessment in the Himalayan region must take into account the role of transverse tectonics.

  7. Using Pooled Local Expert Opinions (PLEO to Discern Patterns in Sightings of Live and Dead Manatees (Trichechus senegalensis, Link 1785 in Lower Sanaga Basin, Cameroon.

    Directory of Open Access Journals (Sweden)

    Theodore B Mayaka

    Full Text Available We aimed at unveiling patterns in live and dead manatee sightings in the Lower Sanaga Basin, Cameroon. For this purpose, the expert opinions of 133 local fishers were collected during in-person interviews, distilled using categorical data analysis, and checked against scientific literature. The five main results are as follows: manatees were sighted averagely once a week in lakes, rivers, and the coast & estuaries, mostly in group sizes of 2-3; the odds of sighting live manatees (respectively dead manatees decreased (respectively increased from inland lakes to estuaries and the coast, via rivers; manatee carcasses were reported in all habitats, albeit more frequently in rivers; a distribution map based on fishers' reports show two manatee concentration areas: Lake Ossa and the Malimba-Mbiako section of River Sanaga; the number of manatees was perceived as increasing despite incidental and directed catches. Thus, our findings corroborate earlier assessments of the Lower Sanaga Basin as being a major manatee conservation area. Additionally, from these results and the literature, we identified three hypotheses about local manatee persistence: deep pools such as lakes offer year round sanctuaries, not just dry-season refugia; seasonality of specific habitat variables determine manatee occurrence patterns; and local variability in habitat encroachment mediate the meta-population dynamics of manatee in the Lower Sanaga Basin. Finally, we examine the implications for data requirements in light of the small ecological scale at which the surveyed fishers ply their trade. Thus, consonant with the Malawi principles for the ecosystem approach to management (www.cbd.int/ecosystem, we recommend collecting data preferably at landscape scale, through a participatory monitoring program that fully integrates scientific and traditional knowledge systems. This program should include, amongst others, a standardised necropsy protocol for collecting mortality and

  8. Comparative characteristics of shoulder blade (Scapula and shoulder bone (Humerus of roe deer (Capreolus capreolus and sheep (Ovis aries in order to determine the animal species

    Directory of Open Access Journals (Sweden)

    Blagojević Miloš

    2016-01-01

    Full Text Available In illegal hunting it is often possible only on the basis of morphological characteristics to determine the animal species. By the method of comparison there was performed the forensic analysis of roe deer and sheep osteological features. For the purpose of investigating the shoulder blade (Scapula and shoulder bone (Humerus comparative characteristics, there were used 6 shoulder blades and 6 shoulder bones of roe deer and 8 shoulder blades and 8 shoulder bones of sheep. After the skin, muscles, arterial, venous and lymphatic vessels as well as nerves were removed from the bones, they were thermally treated in an autoclave. Subsequently, the bones were placed in 3% solutioin of hydrogen peroxide (H2O2 for bleaching and degreasing. Then they were air dried and then photographed. Shoulder blade (Scapula is a bone plate (Ossa plana roughly triangular in shape. Scapular spine (Spina scapulae is much more prominent in roe deer with acromion blade in the form of spike, while in sheep it is shorter and ends with acrimion at a right angle. Shoulder blade cup (Cavitas glenoidalis in roe deer is round in shape, and in sheep it is oval. Tuberculum supraglenoidale and Processus coracoideus in sheep are more and in roe deer less developed. Shoulder bone (Humerus in roe deer is relatively long, slender bone with proximal convexity turned cranially in regard to the same bone in sheep, which is stronger and heavier. Tuberculum majus in roe deer is less developed, and in sheep it is in a form of solid bone protuberance. Tuberculum minus and Tuberositas deltoidea in sheep are more developed than in roe deer. At medial condyle (Condylus medialis in sheep there is shallow and wide groove, while in roe deer it is deeper and narrower. On the basis of morphological differences of roe deer and sheep bones, it can be determined with certainty which animal spesies they belong to.

  9. The thoracic limb of the suricate (Suricata suricatta): osteology, radiologic anatomy, and functional morphologic changes.

    Science.gov (United States)

    van Staden, Sheryl L

    2014-09-01

    The purpose of the study was to identify unique features of the normal osteology and radiologic anatomy of the thoracic limb of the meerkat or suricate (Suricata suricatta), as no comprehensive information has been published. Bone specimens of 19 suricates were studied. Individual bones of the manus of one preserved carcass were studied in situ. Radiographic evaluation was performed in six animals. Comparisons to domestic carnivores were made and functional morphologic changes were identified. A suprahamate process was present on the scapula spine. Both supratrochlear and supracondylar foramina were present in the distal humerus, with a small Fossa coronoidea seen cranially. The medial epicondyle was markedly larger than the lateral epicondyle. The Tuberositas radii was located caudally. The proximal end of the olecranon was prominent medially. The large medial coronoid process had an extensive proximal articulation facet for the humeral trochlea. The ulna styloid process articulated with the ulnar and accessory carpal bones. The manus was similar to that of domestic carnivores; however, Os metacarpalis I was markedly reduced with the absence of the first digit. There were seven carpal bones. Os carpi radiale was the largest, with a large palmaro-medial process and a small sesamoid bone present medially. Ossa metacarpalia II-V and corresponding phalanges were slender, with an elongated Processus unguicularis (third phalanx) present. Radiologic findings demonstrated increased mobility of the scapula and shoulder joint, with ease of abduction. On the cranio-caudal view of the humerus and elbow joint, the distal radius and manus were consistently rotated in a supinated position. Morphologic changes were identified for the enhanced, predominant function of the shoulder, elbow, carpal, and digital flexor muscles associated with superior digging ability, and supination of the antebrachium and manus. Reference values for size parameters of the long bones are reported. The

  10. Conceiving and Marketing NASA's Great Observatories

    Science.gov (United States)

    Harwit, Martin

    2009-01-01

    In late 1984, Dr. Charles P. (Charlie) Pellerin Jr., director of the Astrophysics Division of NASA's Office of Space Science and Applications (OSSA) faced a dilemma. Congress and the White House had given approval to work that would lead to the launch of the Gamma Ray Observatory and the Hubble Space Telescope, but competing segments of the astronomical community were clamoring for two additional missions, the Space Infrared Telescope Facility (SIRTF) and the Advanced X-ray Astrophysics Facility (AXAF). Pellerin knew that Congress would not countenance a request for another costly astronomical space observatory so soon after approving GRO and HST. He also foresaw that if he arbitrarily assigned priority to either AXAF or SIRTF he would split the astronomical community. The losing faction would be up on Capitol Hill, lobbying Congress to reverse the decision; and Congress would do what it always does with split communities --- nothing. Pellerin called a meeting of leading astrophysicists to see how a persuasive argument could be made for both these new observatories and to market them as vital to a first comprehensive inventory of the universe conducted across all wavelength ranges. The group provided Pellerin a rotating membership of astrophysicists, who could debate and resolve issues so that decisions he reached would have solid community support. It also helped him to market his ideas in Congress. Ultimately, the concept of the Great Observatories came to be accepted; but its implementation faced myriad difficulties. False starts, political alliances that never worked out, and dramatic changes of direction necessitated by the Challenger disaster of early 1986 continually kept progress off balance. My paper follows these twists and turns from late 1984 to the announcement, on February 1, 1988, that President Reagan's FY89 budget proposal to Congress had designated AXAF for a new start.

  11. Cretaceous plate interaction during the formation of the Colombian plateau, Northandean margin

    Science.gov (United States)

    Kammer, Andreas; Piraquive, Alejandro; Díaz, Sebastián

    2015-04-01

    The Cretaceous subduction cycle at the Northandean margin ends with an accretionary event that welds the plateau rocks of the present Western Cordillera to the continental margin. A suture between plateau and rock associations of the continental margin is well exposed at the western border of the Central Cordillera, but overprinted by intense block tectonics. Analyzed in detail, its evolution tracks an increased coupling between lower and upper plate, as may be accounted for by the following stages: 1) The Cretaceous plateau suite records at its onset passive margin conditions, as it encroaches on the continental margin and accounts for an extensional event that triggered the emplacement of ultramafic and mafic igneous rock suites along major faults. 2) An early subduction stage of a still moderate plate coupling is documented by the formation of a magmatic arc in an extensional setting that may have been prompted by slab retreat. Convergence direction was oblique, as attested the transfer of strike-slip displacements to the forearc region. 3) A phase of strong plate interaction entailed the delamination of narrow crustal flakes and their entrainment to depths below the petrologic Moho, as evidenced by their present association to serpentinites in a setting that bears characteristics of a subduction channel. 4) During the final collisional stage deformation is transferred to the lower plate, where the stacking of imbricate sheets, combined with their erosional unloading, led to the formation of an antiformal bulge that fed a foreland basin. - The life time of this Cretaceous subduction cycle was strictly synchronous to the construction of the Colombian plateau. With the final collisional stage magmatic activity vanished. This coincidence incites to explore a relationship between plume activity and subduction.

  12. Cretaceous metamorphic core complexes in the Otago Schist, New Zealand

    International Nuclear Information System (INIS)

    Forster, M.A.; Lister, G.S.

    2003-01-01

    The median antiformal axis of the Otago Schist, New Zealand, is marked by a zone of relatively high-grade (up to garnet-biotite-albite) greenschist facies rocks 40 Ar/ 39 Ar geochronology has been earned out in conjunction with structural analysis in regions distant from the effects of the Alpine Fault to determine the origin of this metamorphic welt. We have determined that the metamorphic welt is bounded on its northern and southern sides by multistage ductile shear zone(s) marked by intensely developed fabrics, and/or low-angle normal faults. These structures extend over a strike length of > ∼ 200 km and on the southern side of the metamorphic welt they mark the boundary between the Caples and the Torlesse terranes. The oldest such shear zone formed between 122 and 118 Ma. The metamorphic welt was exhumed beneath low-angle normal faults and ductile shear zones that formed from 112 to 109 Ma. The shear zones form the carapace to elongate domal culminations in the central Otago Schist. These geomorphological features are Cretaceous metamorphic core complexes dissected by younger Quaternary faults. Exhumation of the shear zones occurred shortly before volcanogenic sediments began to deposit on a Cretaceous unconformity. We propose that both the Cretaceous unconformity and the underlying ductile shear zones and low-angle faults are a direct result of extensional tectonism. The ductile shear zones display both 'cross-belt' and 'belt-parallel' stretching lineations. Cross-belt stretching may have been caused by rollback of the subducting Pacific slab. Belt parallel extension is interpreted to have taken place during extension associated with rifting between Australia and Antarctica, prior to breakup. Copyright (2003) Geological Society of Australia

  13. Academic Biography in the Context of the Anti-Formalist Campaign of the 1930s

    Directory of Open Access Journals (Sweden)

    Yelena N. Penskaya

    2014-07-01

    Full Text Available The paper is focused around two biographical themes. Theme one is history of demolishing Leningrad school of dramatic theory developed in the State Institute of History of Art (GIII in the 1920s. In 1931, the GIII was closed by a Sovnarkom resolution and transformed into Len- ingrad division of the State Academy of Art Studies (LOGAIS established by the same resolu- tion. Theme two is description of the ‘academic traumatism’, traumatic behavior and its bio- graphical effects caused by destruction of a whole scientific trend during the anti-formalism campaign of the early 1930s. Based on archival documents (from the Russian State Archive of Literature and Art, shorthand notes and reports on discussions of the 1930s, we analyze behav- ioral tactics of initiators, participants and victims of the longstanding stigmatization and catalog absolutory, denunciative and repentant narratives. In particular, this paper analyzes the un- published letter to the editors of Rabochiy i Teatr journal written by Alexander Slonimsky, one of the key players in development and obliteration of dramatic theory associated primarily with Alexei Gvozdev’s group and with transformation and dissolution of the leading humanities in- stitutes. The text of the letter appears to be engrained in the complicated mosaic of measures aimed to discredit Meyerhold’s theater practice and Gvozdev as the leader of the scientific school. Deliberate misinterpretation and corruption of self-descriptions along with reconstruc- tion of biographies are some of the most crucial factors that affected reception of cultural pro- jects and their creators in the 1930s and later.

  14. Mayer Kangri metamorphic complexes in Central Qiangtang (Tibet, western China): implications for the Triassic-early Jurassic tectonics associated with the Paleo-Tethys Ocean

    Science.gov (United States)

    Wang, Yixuan; Liang, Xiao; Wang, Genhou; Yuan, Guoli; Bons, Paul D.

    2018-03-01

    The Mesozoic orogeny in Central Qiangtang Metamorphic Belt, northern Tibet, provides important insights into the geological evolution of the Paleo-Tethys Ocean. However, the Triassic-early Jurassic tectonics, particularly those associated with the continental collisionstage, remains poorly constrained. Here we present results from geological mapping, structural analysis, P-T data, and Ar-Ar geochronology of the Mayer Kangri metamorphic complex. Our data reveal an E-W-trending, 2 km wide dome-like structure associated with four successive tectonic events during the Middle Triassic and Early Jurassic. Field observations indicate that amphibolite and phengite schist complexes in this complex are separated from the overlying lower greenschist mélange by normal faulting with an evident dextral shearing component. Open antiform-like S2 foliation of the footwall phengite schist truncates the approximately north-dipping structures of the overlying mélange. Microtextures and mineral chemistry of amphibole reveal three stages of growth: Geothermobarometric estimates yield temperatures and pressures of 524 °C and 0.88 GPa for pargasite cores, 386 °C and 0.34 GPa for actinolite mantles, and 404 °C and 0.76 GPa for winchite rims. Peak blueschist metamorphism in the phengite schist occurred at 0.7-1.1 GPa and 400 °C. Our Ar-Ar dating of amphibole reveals rim-ward decreasing in age bands, including 242.4-241.2 Ma, ≥202.6-196.8, and 192.9-189.8 Ma. The results provide evidence for four distinct phases of Mesozoic tectonic evolution in Central Qiangtang: (1) northward oceanic subduction beneath North Qiangtang ( 244-220 Ma); (2) syn-collisional slab-break off (223-202 Ma); (3) early collisional extension driven by buoyant extrusion flow from depth ( 202.6-197 Ma); and (4) post-collision contraction and reburial (195.6-188.7 Ma).

  15. Large impacts in the Baltic shield with special attention to the Uppland structure

    Science.gov (United States)

    Henkel, H.; Lilljequist, R.

    1992-01-01

    Within the Baltic Shield several very large structures have been identified and are suspected to be of meteorite impact origin. Some of these deeply eroded circular features are presented with special attention to the Uppland structure, where several indications point toward an impact origin in the mid-Proterozoic. The structures exceed 100 km in diameter and the topographic expression is inferior or absent. An arcuate arrangement of lithologies occurs around the margin of the structures and the central regions show conform magnetic and positive gravity anomalies. The Uppland structure is approximately 320 km in diameter as expressed by morphological, geological, and geophysical concentric patterns. The central part is topographically remarkably flat and is characterized by an unusual irregular fracture pattern. A subcircular central tonalite with density of 2.81 Mg(sup -3) gives a positive gravity anomaly of 35 mgal and the gravimetric profile is very similar to that of Manicouagan and Vredefort. The tonalite constitutes a huge antiform, 80 km in diameter, probably representing a 12-km structural uplift of infracrustal rocks. The flancs of the tonalite are characterized by recrystallized pseudotachylitic breccia dykes and breccia zones. Around the central parts amphibolite-grade metamorphic rocks appear as large fragments within a fine-grained granite interpreted as a thermally annealed melt rock. Several occurrences of breccia dykes and breccia-bearing melts have been identified about 100 km from the gravimetric center of the structure. Impact-related ore deposits are located around the margin of the structure and are interpreted as preexisting downfaulted iron formations, and deposits formed from remobilization of these preimpact occurrences. The so-called ball ores are interpreted to have formed by fluid injection similar to the formation of breccia dykes. The extensive hydrothermal alteration along the outer margin of the structure have created extreme soda

  16. Thrust duplex deformation in the volcaniclastic sequence of the Fatima fold-and-thrust belt in the west-central Arabian Shield

    Science.gov (United States)

    El-Shafei, Mohamed K.

    2017-05-01

    In this study, we present a field-based structural analysis of the unmetamorphosed Precambrian volcaniclastic sequences of the west-central Arabian Shield. The study area is known as the Fatima fold-and-thrust belt, which is an overturned synclinorium that developed during the Neoproterozoic era. This belt is composed primarily of green mudstone, green sandstone, an andesite flow, limestone, red mudstone and pyroclastic units. This stratigraphic succession, which presents different rheological multilayers, offers significant mesoscale folding and thrust-related structures. Mechanical anisotropy and thickness contrasts have played significant roles in controlling the style of the deformation. Deformed hinge zones, a simple duplex, a domino-style duplex, and imbricated and antiformal stacks are among the thrust-related structures presented and analyzed. The domino-style duplex observed on the backlimbs of the overturned anticlines formed a unique pattern that developed during thrust propagation. The results of this study indicate that the thrust duplex developed according to a thick-skinned model, and it represents a newly recognized tectonic regime in the Arabian Shield. Comprehensive field mapping and structural analyses revealed that the zone under study area was affected by four phases of deformation (D1-D4). The D1 and D2 phases present ductile deformation that developed during the final cratonization and assembly of the Arabian Shield, and they can be recognized at both the map and outcrop scales. The D1 phase represents a progressive regime and is indicated by a NW-SE stress orientation and the formation of a series of coaxial symmetrical NE-SW-plunging folds. NNW-directed thrust-related structures progressively developed during the D2 phase. An approximately fifty-three percent tectonic shortening can be calculated based on the restored structures. D3 and D4 have a brittle nature and are indicated by shearing and normal faulting, respectively.

  17. Segmentation of an Active Forearc Setting Chile (37°S)

    Science.gov (United States)

    Rehak, K.; Strecker, M.; Echtler, H.

    2006-12-01

    Many forearc-regions are characterized by seismo- and morphotectonic segments that may record recurring activity of large earthquakes in the past. Here, we investigate the forearc of the active convergent margin of south-central to southern Chile corresponding to the rupture zone of the Chilean 1960 megathrust earthquake. We apply geomorphological and sedimentological analyses, as well as compiled structural and geophysical data to reconstruct the morphotectonic evolution and segmentation of the active forearc setting, and in a further step, we evaluate the responsible driving forces. It is very important, from a landscape development as well as from an earthquake-hazard perspective, to understand the evolution of forearc segmentation. However, it is not well known on which timescales forearc segments retain their tectono-geomorphic identity, how they are related to earthquake rupture zones, and what may govern their long-term evolution. Our results document a pronounced segmentation of the southern Chilean forearc into three segments that had a semi-independent structural and geomorphic evolution. From north to south we call them Nahuelbuta, Toltén and Bueno segment. Whereas the Toltén segment appears to be quasi-stable, the other two segments record Quaternary uplift. The Nahuelbuta and Bueno segments are characterized by broad, N-S oriented antiformal structures with numerous anomalies in the highly dynamic fluvial network. Our inferred morphotectonic segmentation can be reproduced by structural, seismic as well as gravimetric data, and partly coincides with earthquake rupture zones. Apparently, this segmentation is persistent over time-scales of 104 to 106 years as opposed to transient earthquake rupture zones that exhibit short-term variability over 102 to 103 years. Finally, we propose that this differential forearc evolution is focussed by inherited upper plate structures, but appears to be ultimately controlled by subsequent physical changes in the highly

  18. Palaeozoic Magmatism Associated with Gold-Antimony-Tin-Tungsten-Lead-Zinc and Silver Mineralization in the Neighbouring of Porto, Northern Portugal

    Science.gov (United States)

    Couto, Helena; Roger, Guy

    2017-12-01

    In the studied area there are evidences of Palaeozoic magmatism along the stratigraphic succession from Cambrian to Carboniferous. Igneous, volcanic and sub-volcanic rocks occur along and around a significant Variscan structure, the Valongo Anticline, an asymmetrical antiform anticline, trending NW-SE, located in Central Iberian Zone in the neighbourhood of Porto (Northern Portugal). Mineralizations of gold-antimony-tin-tungsten-lead-zinc and silver occur in the area. Magmatism related to acid and basic subvolcanic and volcanic rocks occurs interbedded in Montalto Formation metasediments (conglomerates, quartzite, wakes and slates) of Cambrian age. In the transition Cambrian-Ordovician (Tremadocian?) underlying the Lower Ordovician massive quartzite of Santa Justa Formation (Floian age), volcanic rocks show bimodal composition and occur interbedded in a lithologic association mainly composed of conglomerate and quartzite with minor slate and wake intercalations. The acid volcanism consists of interbedded volcanoclastic rocks of rhyolitic affinities and black and green cherts in thick layers represent the basic volcanism. To the top of this basal Early Ordovician volcano-sedimentary succession, overlaying Floian massive quartzites, a succession of interbedded quartzite’s, wackes and slates, enriched in ironstones in the normal limb, and bearing prints of volcanic origin occur. Sub-concordant quartz veins (exhalative-origin) interbedded in the ironstones were interpreted as volcanic layers recrystallized during the circulation of hydrothermal mineralizing fluids. The presence of igneous rocks in Palaeozoic Carboniferous metasediments around Porto is known since middle of nineteen century. Granodioritic porphyry intrusion occurs interbedded in carboniferous metasediments. Metasedimentary country rocks are surrounded by pre- to post-orogenic Variscan granites with no direct spatial relationship with mineralization but hidden granitic apexes suggest an indirect

  19. Himalayan gneiss dome formation in the middle crust and exhumation by normal faulting: New geochronology of Gianbul dome, northwestern India

    Science.gov (United States)

    Horton, Forrest; Lee, Jeffrey; Hacker, Bradley; Bowman-Kamaha'o, Meilani; Cosca, Michael A.

    2015-01-01

    A general lack of consensus about the origin of Himalayan gneiss domes hinders accurate thermomechanical modeling of the orogen. To test whether doming resulted from tectonic contraction (e.g., thrust duplex formation, antiformal bending above a thrust ramp, etc.), channel flow, or via the buoyant rise of anatectic melts, this study investigates the depth and timing of doming processes for Gianbul dome in the western Himalaya. The dome is composed of Greater Himalayan Sequence migmatite, Paleozoic orthogneiss, and metasedimentary rock cut by multiple generations of leucogranite dikes. These rocks record a major penetrative D2 deformational event characterized by a domed foliation and associated NE-SW–trending stretching lineation, and they are flanked by the top-down-to-the-SW (normal-sense) Khanjar shear zone and the top-down-to-the-NE (normal sense) Zanskar shear zone (the western equivalent of the South Tibetan detachment system). Monazite U/Th-Pb geochronology records (1) Paleozoic emplacement of the Kade orthogneiss and associated granite dikes; (2) prograde Barrovian metamorphism from 37 to 33 Ma; (3) doming driven by upper-crustal extension and positive buoyancy of decompression melts between 26 and 22 Ma; and (4) the injection of anatectic melts into the upper levels of the dome—neutralizing the effects of melt buoyancy and potentially adding strength to the host rock—by ca. 22.6 Ma on the southwestern flank and ca. 21 Ma on the northeastern flank. As shown by a northeastward decrease in 40Ar/39Ar muscovite dates from 22.4 to 20.2 Ma, ductile normal-sense displacement within the Zanskar shear zone ended by ca. 22 Ma, after which the Gianbul dome was exhumed as part of a rigid footwall block below the brittle Zanskar normal fault, tilting an estimated 5°–10°SW into its present orientation.

  20. Feline leukemia virus and other pathogens as important threats to the survival of the critically endangered Iberian lynx (Lynx pardinus.

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    Marina L Meli

    Full Text Available The Iberian lynx (Lynx pardinus is considered the most endangered felid species in the world. In order to save this species, the Spanish authorities implemented a captive breeding program recruiting lynxes from the wild. In this context, a retrospective survey on prevalence of selected feline pathogens in free-ranging lynxes was initiated.We systematically analyzed the prevalence and importance of seven viral, one protozoan (Cytauxzoon felis, and several bacterial (e.g., hemotropic mycoplasma infections in 77 of approximately 200 remaining free-ranging Iberian lynxes of the Doñana and Sierra Morena areas, in Southern Spain, between 2003 and 2007. With the exception of feline immunodeficiency virus (FIV, evidence of infection by all tested feline pathogens was found in Iberian lynxes. Fourteen lynxes were feline leukemia virus (FeLV provirus-positive; eleven of these were antigenemic (FeLV p27 positive. All 14 animals tested negative for other viral infections. During a six-month period in 2007, six of the provirus-positive antigenemic lynxes died. Infection with FeLV but not with other infectious agents was associated with mortality (p<0.001. Sequencing of the FeLV surface glycoprotein gene revealed a common origin for ten of the eleven samples. The ten sequences were closely related to FeLV-A/61E, originally isolated from cats in the USA. Endogenous FeLV sequences were not detected.It was concluded that the FeLV infection most likely originated from domestic cats invading the lynx's habitats. Data available regarding the time frame, co-infections, and outcome of FeLV-infections suggest that, in contrast to the domestic cat, the FeLV strain affecting the lynxes in 2007 is highly virulent to this species. Our data argue strongly for vaccination of lynxes and domestic cats in and around lynx's habitats in order to prevent further spread of the virus as well as reduction the domestic cat population if the lynx population is to be maintained.

  1. Indicadores de risco para tentativa de suicídio por envenenamento: um estudo caso-controle

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    Maria Cláudia da Cruz Pires

    2015-09-01

    Full Text Available RESUMO Objetivo Considerando o envenenamento como o método mais utilizado para a tentativa de suicídio e a escassez de evidências nacionais sobre o tema, investigamos alguns possíveis indicadores de risco nesse tipo de tentativa. Métodos Estudo do tipo caso-controle em uma emergência geral de um hospital público, na cidade do Recife com 220 indivíduos, distribuídos em dois grupos de 110 pacientes cada, que estavam em tratamento, sendo o grupo casos os sobreviventes de tentativa de suicídio por envenenamento e os controles, sem história de intoxicação/envenenamento nem tentativa de suicídio, pareados por gênero e idade. Resultados O gênero feminino predominou na amostra (70,9%, com idade média de 29 anos; 73% declararam etnia branca ou morena; menos da metade vivia em convívio marital; a maioria tinha religião; ambos tinham poucos anos de estudo. Houve diferença significativa (p = 0,003 para dependência financeira entre os grupos, com chance 2,25 vezes maior para tentar suicídio entre os casos. Ter sofrido fatos traumáticos e abuso sexual na infância revelou diferença significativa. Conclusões Foram considerados indicadores de risco no grupo caso: estar em dependência financeira de terceiros, ter sofrido abuso sexual na infância, ideação suicida, histórico de transtorno mental na família, possuir algum transtorno mental e, principalmente, comorbidade(s psiquiátrica(s. No modelo de regressão, foi possível estimar uma chance de tentativa de suicídio por envenenamento de até 94,0% na presença conjunta de quatro fatores. A pesquisa representa uma das primeiras iniciativas para ampliação das discussões sobre os fatores de risco para tentativa de suicídio em âmbito nacional.

  2. Suicídio atípico com dois ou mais disparos efetivos de arma de fogo: casuística do Instituto Médico Legal de Belo Horizonte e implicações periciais

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    Leonardo Santos Bordoni

    2017-05-01

    Full Text Available O Brasil ocupou o oitavo lugar em números absolutos de suicídios no mundo em 2012. Apesar do suicídio com arma de fogo (AF não ser a modalidade mais comum, é frequente seu encontro na prática pericial criminal. Na maioria dos suicídios com AF há apenas um disparo efetivo e o encontro de duas ou mais lesões de entrada classifica o suicídio como atípico. Neste estudo foram avaliados os suicídios atípicos com dois ou mais disparos efetivos de AF nas necropsias do Instituto Médico Legal de Belo Horizonte realizadas entre 2006 e 2012. Foram resgatados cinco casos, correspondendo a 2,63% do total de suicídios com AF autopsiados no período estudado. A maioria dos casos era do sexo masculino, solteira, tinha pele morena, apresentava idade média de 42,3 anos e recebeu atendimento médico previamente ao óbito. Em quatro casos foram observadas duas lesões de entrada de projéteis de AF e em apenas um foram observadas três. Todos apresentavam lesões de entrada no tórax, a maioria localizada na região peitoral esquerda. Em dois indivíduos houve lesões de entrada no tórax e na cabeça. A causa da morte da maioria foi traumatismo torácico perfuro-contuso. Apesar da necropsia forense ser crucial no estabelecimento da causa médica da morte e na avaliação da capacidade de desempenhar atos motores voluntários após um primeiro disparo, a investigação criminal de casos de suicídios atípicos é um trabalho multidisciplinar, onde cada uma das peças periciais deve se encaixar adequadamente para o estabelecimento correto da causa jurídica da morte.

  3. Racism and mental health among university students in Mexico City Racismo y salud mental en estudiantes universitarios de la Ciudad de México

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    Luis Ortiz-Hernández

    2011-04-01

    Full Text Available OBJECTIVE: To assess whether differences exist in experiences of discrimination, perceptions of physical attractiveness, socioeconomic position, and mental health according to student's skin color. MATERIALS AND METHODS: The population included students from a public university in Mexico City. The following three groups were created based on skin color: white, light brown, and brown. By means of regression models, we evaluated whether differences in mental health according to skin color could be due to experiences of discrimination, perceptions of physical attractiveness, and/or socioeconomic position. RESULTS: Students with brown skin had lower levels of self-esteem and vitality and higher levels of fatigue and alcohol consumption. These differences were explained by more frequent experiences of discrimination and because students with brown skin perceived themselves as less attractive. CONCLUSIONS: This is one of the first studies to document the possible effects of racism on mental health among the urban population. Verification of these findings in representative samples is required.OBJETIVOS: Conocer si existen diferencias en experiencias de discriminación, percepción del atractivo físico, posición socioeconómica y salud mental en función del color de la piel. MATERIAL Y MÉTODOS: La población consistió en estudiantes de una universidad de la Ciudad de México. A partir del color de piel se formaron tres grupos: blancos, morenos claros y morenos. Mediante modelos de regresión se evaluó si las diferencias en salud mental de acuerdo al color de piel se debían a experiencias de discriminación, percepción del atractivo físico y/o posición socioeconómica. RESULTADOS: Los que tenían piel morena tuvieron niveles más bajos de autoestima y vitalidad, pero más altos de cansancio y de consumo de alcohol. Estas diferencias fueron explicadas por las experiencias de discriminación y porque los estudiantes morenos se percibían menos

  4. Remains of Insectivores and Rodents of recent age collected in a cave of Capri Island (Italy / Resti di Insettivori e Roditori di età recente raccolti in una grotta dell'isola di Capri (Italia

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    Carmela Barbera

    1990-07-01

    Full Text Available Abstract Remains of small mammals from a cave of Capri Island (Italy were examined. They were collected together with other small vertebrates and are probably from pellets of birds of prey of subrecent age. The following species have been recognized from cranial bones and teeth: Suncus etruscus (Savi, Rattus rattus (L., Mus domesticus Rutty, Apodemus sp. and Eliomys quercinus (L.. As regards Apodemus, the species identification was not possible since only mandibles were present among the remains belonging to this genus. Notwithstanding the attribution of our specimens to Apodemus agrarius can be excluded and it is limited to A. sylvaticus or A. flavicollis. It was not possible to make a comparison with Apodemus sylvaticus tyrrhenicus from the late Pleistocene of Capri; nevertheless the length and width of M1 and M2 of Apodemus sp. fall within the respective ranges of Apodemus sylvaticus tyrrhenicus provided by Gliozzi (in print. The occurence of Suncus etruscus (Savi, Apodemus sp. (probably A. sylvaticus or A. flavicollis, and Eliomys quercinus (L. in subrecent time of Capri Island is not mentioned in the literature. Riassunto Nel presente lavoro viene effettuato lo studio tassonomico di resti di micromammiferi rinvenuti a Capri; questi si trovavano insieme ad altre ossa di microvertebrati, in un accumulo riferibile con tutta probabilità a residui di borre di rapaci di età subattuale. Le specie individuate sono: Suncus etruscus (Savi, Rattus rattus (L., Mus domesticus Rutty, Apodemus sp. e Eliomys quercinus (L.. La presenza sull'isola delle specie Suncus etruscus (Savi, Apodemus sp. e Eliomys quercinus (L. non è segnalata in precedenti pubblicazioni.

  5. Analysis of shadowing effects on MIR photovoltaic and solar dynamic power systems

    Science.gov (United States)

    Fincannon, James

    1995-01-01

    The NASA Lewis Research Center is currently working with RSC-Energia, the Russian Space Agency, and Allied Signal in developing a flight demonstration solar dynamic power system. This type of power system is dependent upon solar flux that is reflected and concentrated into a thermal storage system to provide the thermal energy input to a closed-cycle Brayton heat engine. The solar dynamic unit will be flown on the Russian Mir space station in anticipation of use on the International Space Station Alpha. By the time the power system is launched, the Mir will be a spatially complex configuration which will have, in addition to the three-gimbaled solar dynamic unit, eleven solar array wings that are either fixed or track the Sun along one axis and a variety or repositionable habitation and experiment modules. The proximity of arrays to modules creates a situation which makes it highly probable that there will be varying solar flux due to shadowing on the solar dynamic unit and some of the arrays throughout the orbit. Shadowing causes fluctuations in the power output from the arrays and the solar dynamic power system, thus reducing the energy capabilities of the spacecraft. An assessment of the capabilities of the power system under these conditions is an important part in influencing the design and operations of the spacecraft and predicting its energy performance. This paper describes the results obtained from using the Orbiting Spacecraft Shadowing Analysis Station program that was integrated into the Station Power Analysis for Capability Evaluation (SPACE) electrical power system computer program. OSSA allows one to consider the numerous complex factors for analyzing the shadowing effects on the electrical power system including the variety of spacecraft hardware geometric configurations, yearly and daily orbital variations in the vehicle attitude and orbital maneuvers (for communications coverage, payload pointing requirements and rendezvous/docking with other

  6. Sistemas territoriales de salud frente al sistema general de seguridad social en salud de Colombia

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    Jahir Alexander Gutiérrez Ossa

    2014-06-01

    Full Text Available Introducción: El artículo expone los elementos y fundamentos que podrían avalar la generación de sistemas de seguridad social en salud territorial, en complementación con el sistema general preexistente. Materiales y Métodos: La eclosión generalizada en los sistemas de salud, implica la revisión de los modelos propuestos de carácter central y territorial. El análisis económico institucional, permite analizar las condiciones que tienen los sistemas generales para impactar en los esquemas territoriales. Resultados: Es el momento preciso, para que el sistema general en Colombia responda efectivamente en la materia, y que tanto ello, podría dar cuenta de la capacidad sistémica del mismo en el escenario territorial. Discusión: Es importante, que las gobernaciones y municipios planteen el alcance de dicha iniciativa. El Sistema General de Seguridad Social en Salud en Colombia, gira en torno a modelos y no a la concepción de sistema de salud efectivamente. Conclusiones: La definición de sistema de salud está opacando la atención para definir lo que implica efectivamente la salud, independiente de cualquier sistema al que se pretenda apuntar al final. Palabras clave: Cobertura de Servicios Públicos de Salud, Evaluación en Salud, Sistemas Multiinstitucionales, Sistemas Nacionales de Salud, Políticas Públicas de Salud. (Fuente: DeCS BIREME. Cómo citar este artículo: Gutiérrez Ossa JA, Restrepo Avendaño RD. Sistemas territoriales de salud frente al sistema general de seguridad social en salud de Colombia. Rev Cuid. 2014; 5(1: 623-32.

  7. Estudio Sísmico de la Corteza Ibérica Norte 3.3: A seismic image of the Variscan crust in the hinterland of the NW Iberian Massif

    Science.gov (United States)

    Ayarza, Puy; CataláN, José R. MartíNez; Gallart, Josep; Pulgar, Javier A.; DañObeitia, Juan J.

    1998-04-01

    An offshore vertical incidence reflection seismic study with simultaneous on-land wide-angle recording has been conducted, as part of the Estudio Sismico de la Corteza Ibérica Norte (ESCIN) Project, in the NW Iberian Variscan Belt, an area deeply affected by Variscan and Alpine deformation episodes. Line ESCIN-3.3 was recorded across strike of the main Variscan structures, transecting two of the zones in which the NW Iberian Massif has been subdivided. This study intends to correlate the seismic features observed in the near-vertical reflection profile with the velocity model deduced from the wide-angle data, with the well-known geological structure of the Variscan upper crust, and with some other geophysical features described on the basis of offshore and onshore experiments carried out in the area. The main results can be summarized as follows: (1) identification of two important sedimentary basins in the shallow part of the marine seismic section, related with the Mesozoic extension that gave rise to the opening of the Bay of Biscay, (2) correlation of a number of subhorizontal and west dipping intermediate depth reflections with Variscan compressional structures, (3) interpretation of a local set of strong reflections at 6 s (two-way travel time) as lower crust emplaced at an anomalous shallow level (thought to image the northward prolongation of a body with high P wave velocity and high magnetic susceptibility, described on land underneath a late Variscan antiformal structure, the Lugo Dome), and (4) recognition of two controversial highly reflective subhorizontal bands, located at 7-9 and 11-12 s, respectively. The shallowest of them appears to have a lower crustal P wave velocity and to be separated from the deepest one, probably with similar characteristics, by mantle P wave velocity material. On this basis, a duplication of the lower continental crust is inferred. The deepest of the bands could either represent the remnants of a late Paleozoic crustal

  8. Early Cretaceous wedge extrusion in the Indo-Burma Range accretionary complex: implications for the Mesozoic subduction of Neotethys in SE Asia

    Science.gov (United States)

    Zhang, Ji'en; Xiao, Wenjiao; Windley, Brian F.; Cai, Fulong; Sein, Kyaing; Naing, Soe

    2017-06-01

    The Indo-Burma Range (IBR) of Myanmar, the eastern extension of the Yarlung-Tsangpo Neotethyan belt of Tibet in China, contains mélanges with serpentinite, greenschist facies basalt, chert, sericite schist, silty slate and unmetamorphosed Triassic sandstone, mudstone and siltstone interbedded with chert in the east, and farther north high-pressure blueschist and eclogite blocks in the Naga Hills mélange. Our detailed mapping of the Mindat and Magwe sections in the middle IBR revealed a major 18 km antiformal isocline in a mélange in which greenschist facies rocks in the core decrease in grade eastwards and westwards symmetrically `outwards' to lower grade sericite schist and silty slate, and at the margins to unmetamorphosed sediments, and these metamorphic rocks are structurally repeated in small-scale imbricated thrust stacks. In the Mindat section the lower western boundary of the isoclinal mélange is a thrust on which the metamorphic rocks have been transported over unmetamorphosed sediments of the Triassic Pane Chaung Group, and the upper eastern boundary is a normal fault. These relations demonstrate that the IBR metamorphic rocks were exhumed by wedge extrusion in a subduction-generated accretionary complex. Along strike to the north in the Naga Hills is a comparable isoclinal mélange in which central eclogite lenses are succeeded `outwards' by layers of glaucophane schist and glaucophanite, and to lower grade greenschist facies sericite schist and slate towards the margins. In the Natchaung area (from west to east) unmetamorphosed Triassic sediments overlie quartzites, sericite schists, actinolite schists and meta-volcanic amphibolites derived from MORB-type basalt, which are in fault contact with peridotite. Olivine in the peridotite has undulatory extinction suggesting deformation at 600-700 °C, similar to the peak temperature of the amphibolite; these relations suggest generation in a metamorphic sole. The amphibolites have U/Pb zircon ages of 119

  9. Non-cylindrical fold growth in the Zagros fold and thrust belt (Kurdistan, NE-Iraq)

    Science.gov (United States)

    Bartl, Nikolaus; Bretis, Bernhard; Grasemann, Bernhard; Lockhart, Duncan

    2010-05-01

    The Zagros mountains extends over 1800 km from Kurdistan in N-Iraq to the Strait of Hormuz in Iran and is one of the world most promising regions for the future hydrocarbon exploration. The Zagros Mountains started to form as a result of the collision between the Eurasian and Arabian Plates, whose convergence began in the Late Cretaceous as part of the Alpine-Himalayan orogenic system. Geodetic and seismological data document that both plates are still converging and that the fold and thrust belt of the Zagros is actively growing. Extensive hydrocarbon exploration mainly focuses on the antiforms of this fold and thrust belt and therefore the growth history of the folds is of great importance. This work investigates by means of structural field work and quantitative geomorphological techniques the progressive fold growth of the Permam, Bana Bawi- and Safeen- Anticlines located in the NE of the city of Erbil in the Kurdistan region of Northern Iraq. This part of the Zagros fold and thrust belt belongs to the so-called Simply Folded Belt, which is dominated by gentle to open folding. Faults or fault related folds have only minor importance. The mechanical anisotropy of the formations consisting of a succession of relatively competent (massive dolomite and limestone) and incompetent (claystone and siltstone) sediments essentially controls the deformation pattern with open to gentle parallel folding of the competent layers and flexural flow folding of the incompetent layers. The characteristic wavelength of the fold trains is around 10 km. Due to faster erosion of the softer rock layers in the folded sequence, the more competent lithologies form sharp ridges with steeply sloping sides along the eroded flanks of the anticlines. Using an ASTER digital elevation model in combination with geological field data we quantified 250 drainage basins along the different limbs of the subcylindrical Permam, Bana Bawi- and Safeen- Anticlines. Geomorphological indices of the drainage

  10. Vertical deformation along the Indio Hills, San Andreas Fault, California

    Science.gov (United States)

    Scharer, K. M.; Blisniuk, K.; Sharp, W. D.; Williams, P. L.; Johnson, K.

    2014-12-01

    Halfway between the Salton Sea and San Gorgonio Pass, the southernmost San Andreas Fault (SAF) bifurcates into the Mission Creek and Banning strands. These strands bound the Indio Hills (IH), and mark the first of a series of left-stepping branches that define the transpressional, southern Big Bend of the SAF. Between the fault strands, the Quaternary Ocotillo Formation is deformed with fold axis orientations consistent with dextral shear; structurally the IH are synclinal in the east, transitioning to a complex antiform with increased uplift suggested by exhumation of Tertiary units in the west. We report new long- and short-term erosion rates across the IH and uplift rates on the Banning strand, and we evaluate these measurements in terms of slip rates across the fault system and structural deformation within the IH. Two methods of catchment-averaged erosion rates provide minimum rates yield similar results, (0.08 to 0.34 mm/yr) across 6 catchments. The long-term rates are calculated from eroded volumes estimated from a 10-m DEM surface enveloping the Indio Hills and assume that all folding and uplift initiated ca. 500ka (the 750 ka Bishop ash is uplifted and warped within the IH). The short-term rates, determined from 10Be dating of alluvial sediments, increase gradually to the northwest. Similarity of the rates suggests steady state uplift over the history of the fold; ongoing structural analysis and dating needed to constrain the maximum rates will test this possibility. The new uplift rate for the Banning strand at the east end of the IH is determined from a 60 pts/m^2 DEM produced by structure from motion photogrammetry and U-series ages and cosmogenic dates that provide an age range of 20-76ka for a fan vertically offset by ~2.5 m. The resulting uplift rate on the fault (0.03-0.125 mm/yr) overlaps with the short-term catchment-averaged erosion rate for this location (0.08 mm/yr). Consequently, we interpret that vertical strain is partitioned onto both the

  11. The Black Mountains turtlebacks: Rosetta stones of Death Valley tectonics

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    Miller, Marli B.; Pavlis, Terry L.

    2005-12-01

    The Black Mountains turtlebacks expose mid-crustal rock along the western front of the Black Mountains. As such, they provide keys to understanding the Tertiary structural evolution of Death Valley, and because of the outstanding rock exposure, they also provide valuable natural laboratories for observing structural processes. There are three turtlebacks: the Badwater turtleback in the north, the Copper Canyon turtleback, and the Mormon Point turtleback in the south. Although important differences exist among them, each turtleback displays a doubly plunging antiformal core of metamorphic and igneous rock and a brittle fault contact to the northwest that is structurally overlain by Miocene-Pleistocene volcanic and/or sedimentary rock. The turtleback cores contain mylonitic rocks that record an early period of top-southeastward directed shear followed by top-northwestward directed shear. The earlier formed mylonites are cut by, and locally appear concurrent with, 55-61 Ma pegmatite. We interpret these fabrics as related to large-scale, basement-involved thrust faults at the turtlebacks, now preserved as areally-extensive, metamorphosed, basement over younger-cover contacts. The younger, and far more pervasive, mylonites record late Tertiary extensional unroofing of the turtleback footwalls from mid-crustal depths. Available geochronology suggests that they cooled through 300 °C at different times: 13 Ma at Badwater; 6 Ma at Copper Canyon; 8 Ma at Mormon Point. At Mormon Point and Copper Canyon turtlebacks these dates record cooling of the metamorphic assemblages from beneath the floor of an ˜ 11 Ma Tertiary plutonic complex. Collectively these relationships suggest that the turtlebacks record initiation of ductile extension before ˜ 14 Ma followed by injection of a large plutonic complex along the ductile shear zone. Ductile deformation continued during extensional uplift until the rocks cooled below temperatures for crystal plastic deformation by 6-8 Ma

  12. Geologic map of the northern White Hills, Mohave County, Arizona

    Science.gov (United States)

    Howard, Keith A.; Priest, Susan S.; Lundstrom, Scott C.; Block, Debra L.

    2017-07-10

    IntroductionThe northern White Hills map area lies within the Kingman Uplift, a regional structural high in which Tertiary rocks lie directly on Proterozoic rocks as a result of Cretaceous orogenic uplift and erosional stripping of Paleozoic and Mesozoic strata. The Miocene Salt Spring Fault forms the major structural boundary in the map area. This low-angle normal fault separates a footwall (lower plate) of Proterozoic gneisses on the east and south from a hanging wall (upper plate) of faulted middle Miocene volcanic and sedimentary rocks and their Proterozoic substrate. The fault is part of the South Virgin–White Hills Detachment Fault, which records significant tectonic extension that decreases from north to south. Along most of its trace, the Salt Spring Fault dips gently westward, but it also has north-dipping segments along salients. A dissected, domelike landscape on the eroded footwall, which contains antiformal salients and synformal reentrants, extends through the map area from Salt Spring Bay southward to the Golden Rule Peak area. The “Lost Basin Range” represents an upthrown block of the footwall, raised on the steeper Lost Basin Range Fault.The Salt Spring Fault, as well as the normal faults that segment its hanging wall, deform rocks that are about 16 to 10 Ma, and younger deposits overlie the faults. Rhyodacitic welded tuff about 15 Ma underlies a succession of geochemically intermediate to progressively more mafic lavas (including alkali basalt) that range from about 14.7 to 8 Ma, interfingered with sedimentary rocks and breccias in the western part of the map area. Upper Miocene strata record further filling of the extension-formed continental basins. Basins that are still present in the modern landscape reflect the youngest stages of extensional-basin formation, expressed as the downfaulted Detrital Valley and Hualapai Wash basins in the western and eastern parts of the map area, respectively, as well as the north-centrally located

  13. The Kharapeh orogenic gold deposit: Geological, structural, and geochemical controls on epizonal ore formation in West Azerbaijan Province, Northwestern Iran

    Science.gov (United States)

    Niroomand, Shojaeddin; Goldfarb, Richard J.; Moore, Farib; Mohajjel, Mohammad; Marsh, Erin E.

    2011-01-01

    The Kharapeh gold deposit is located along the northwestern margin of the Sanandaj–Sirjan Zone (SSZ) in the West Azerbaijan province, Iran. It is an epizonal orogenic gold deposit formed within the deformed zone between central Iran and the Arabian plate during the Cretaceous–Tertiary Zagros orogeny. The deposit area is underlain by Cretaceous schist and marble, as well as altered andesite and dacite dikes. Structural analysis indicates that the rocks underwent tight to isoclinal recumbent folding and were subsequently co-axially refolded to upright open folds during a second deformation. Late- to post-tectonic Cenozoic granites and granodiorites occur northeast of the deposit area. Mineralization mainly is recognized within NW-trending extensional structures as veins and breccia zones. Normal faults, intermediate dikes, and quartz veins, oriented subparallel to the axial surface of the Kharapeh antiform, indicate synchronous extension perpendicular to the fold axis during the second folding event. The gold-bearing quartz veins are >1 km in length and average about 6 m in width; breccia zones are 10–50 m in length and ≤1 m in width. Hydrothermal alteration mainly consists of silicification, sulfidation, chloritization, sericitization, and carbonatization. Paragenetic relationships indicate three distinct stages—replacement and silicification, brecciation and fracture filling, and cataclastic brecciation—with the latter two being gold-rich. Fluid inclusion data suggest mineral deposition at temperatures of at least 220–255°C and depths of at least 1.4–1.8 km, from a H2O–CO2±CH4 fluid of relatively high salinity (12–14 wt.% NaCl equiv.), which may reflect metamorphism of passive margin carbonate sequences. Ore fluid δ18O values between about 7‰ and 9‰ suggest no significant meteoric water input, despite gold deposition in a relatively shallow epizonal environment. Similarities to other deposits in the SSZ suggest that the deposit formed as

  14. Controls on the architecture of the Sierra Madre Oriental fold-thrust belt

    Science.gov (United States)

    Murphy, M. A.

    2007-12-01

    Geologic mapping and structural analysis of east-central Mexico were conducted to assess the architecture and structural evolution of the SMO fold-thrust belt. We present a regional map that synthesizes our results from the hinterland to foreland of the SMO fold-thrust belt over a distance of 180 km. Our results show that several regional east-directed thrust faults step-up structurally via flats and ramps. The deepest rocks exhumed in their hanging walls are Paleozoic metasedimentary rocks and early Mesozoic rift deposits in the cores of hanging wall antiforms. At structurally shallow levels thrust faults sole into a regionally extensive evaporite horizon which forms the basal detachment to fold trains within Late Jurassic through Cretaceous marine strata. Field mapping shows that structurally shallow short-wavelength folds rooted into the evaporite horizon are locally folded by structurally deeper long-wavelength folds that expose Paleozoic metasedimentary rocks and early Mesozoic rift deposits. Stratal geometries of the rift deposits suggest that west-dipping normal faults are reactivated by east-directed thrust faults. Structural restorations indicate that east-west shortening is concentrated where crystalline basement has been exhumed while only modest amounts of shortening has occurred between them where deformation is localized along evaporite floored detachments. Comparisons between our field mapping and a regional DEM show that short wavelength folds display a curved mapview pattern and developed above evaporite. These folds are cross cut by linear trending longer wavelength folds that correlate to reactivated rift-bounding faults. This result implies that the architecture and structural history of the SMO fold-thrust belt is contingent upon events that occurred during the opening of the Gulf of Mexico basin. Results of this study permit an assessment of the spatial distribution of Gulf of Mexico basin-related rifts and evaporite deposits. The distribution

  15. Early Cretaceous overprinting of the Mesozoic Daqing Shan fold-and-thrust belt by the Hohhot metamorphic core complex, Inner Mongolia, China

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    Gregory A. Davis

    2010-10-01

    Full Text Available The Early Cretaceous Hohhot metamorphic core complex (mcc of the Daqing Shan (Mtns. of central Inner Mongolia is among the best exposed and most spectacular of the spatially isolated mcc’s that developed within the northern edge of the North China “craton”. All of these mcc’s were formed within the basement of a Late Paleozoic Andean-style arc and across older Mesozoic fold-and-thrust belts of variable age and tectonic vergence. The master Hohhot detachment fault roots southwards within the southern margin of the Daqing Shan for an along-strike distance of at least 120 km. Its geometry in the range to the north is complicated by interference patterns between (1 primary, large-scale NW-SE-trending convex and concave fault corrugations and (2 secondary ENE-WSW-trending antiforms and synforms that folded the detachment in its late kinematic history. As in the Whipple Mtns. of California, the Hohhot master detachment is not of the Wernicke (1981 simple rooted type; instead, it was spawned from a mid-crustal shear zone, the top of which is preserved as a mylonitic front within Carboniferous metasedimentary rocks in its exhumed lower plate. 40Ar–39Ar dating of siliceous volcanic rocks in basal sections of now isolated supradetachment basins suggest that crustal extension began at ca. 127 Ma, although lower-plate mylonitic rocks were not exposed to erosion until after ca. 119 Ma. Essentially synchronous cooling of hornblende, biotite, and muscovite in footwall mylonitic gneisses indicates very rapid exhumation and at ca. 122–120 Ma. Contrary to several recent reports, the master detachment clearly cuts across and dismembers older, north-directed thrust sheets of the Daqing Shan foreland fold-and-thrust belt. Folded and thrust-faulted basalts within its foredeep strata are as young as 132.6 ± 2.4 Ma, thus defining within 5–6 Ma the regional tectonic transition between crustal contraction and profound crustal extension.

  16. Internal dynamics of a paleoaccretionary wedge: insights from combined isotope tectonochronology and sandbox modelling of the South-Central Chilean forearc

    Science.gov (United States)

    Glodny, Johannes; Lohrmann, Jo; Echtler, Helmut; Gräfe, Kirsten; Seifert, Wolfgang; Collao, Santiago; Figueroa, Oscar

    2005-02-01

    Forearc accretionary wedges are cyclic systems in which material is frontally and/or basally accreted. Material cycling involves underthrusting, subduction, underplating, exhumation, erosion, transfer to the trench and underthrusting again. In this study we present a novel, tectonochronologic approach to constrain long-term exhumation rates of basally accreted wedge complexes, based on isotopic dating of structural features, on petrological data and sandbox analogue simulations. Congruence between the structural inventory in nature and structures generated in scaled sandbox experiments allows detailed insights into wedge dynamics. For the present-day surface material of the paleoaccretionary wedge of South-Central Chile (Valdivia area, 40°S), published U-Pb ages of detrital zircon place a maximum age of ˜278 Ma for subduction. Prograde metamorphism at transitional greenschist to blueschist facies conditions (420 °C, 8-9 kbar) was immediately followed by progressive penetrative deformation associated with basal accretion, dated at ˜250-245 Ma using Rb/Sr internal mineral isochrons. The accretion process involved duplex tectonics and antiformal stacking, with formation of near-horizontal mylonitic shear zones at around 241 Ma. Continuous basal accretion at depth gave rise to an extensional tectonic regime at higher structural levels. Both semi-ductile, small-scale extensional shear zones and post-kinematic vein mineralizations yield Rb/Sr ages of ˜235 Ma. Tension gashes, representing the latest isotopically dateable stage of structural evolution, were formed at ˜210 Ma, at conditions of ˜230 °C at 1.5-3 kbar, as constrained by fluid inclusion data. Zircon fission track data indicate final cooling to below ˜200 °C at 186±24 Ma. The results suggest continuous basal accretion for at least 50 Ma, with long-term average exhumation rates of 0.6±0.2 mm/a, most probably outbalanced by similar long-term average erosion rates. Changing plate boundary conditions at

  17. Segmentation of the Himalayan megathrust around the Gorkha earthquake (25 April 2015) in Nepal

    Science.gov (United States)

    Mugnier, Jean-Louis; Jouanne, François; Bhattarai, Roshan; Cortes-Aranda, Joaquim; Gajurel, Ananta; Leturmy, Pascale; Robert, Xavier; Upreti, Bishal; Vassallo, Riccardo

    2017-06-01

    We put the 25 April 2015 earthquake of Nepal (Mw 7.9) into its structural geological context in order to specify the role of the segmentation of the Himalayan megathrust. The rupture is mainly located NW of Kathmandu, at a depth of 13-15 km on a flat portion of the Main Himalayan Thrust (MHT) that dips towards the N-NE by 7-10°. The northern bound of the main rupture corresponds to the transition towards a steeper crustal ramp. This ramp, which is partly coupled during the interseismic period, is only locally affected by the earthquake. The southern bound of the rupture was near the leading edge of the Lesser Himalaya antiformal duplex and near the frontal footwall ramp of the upper Nawakot duplex. The rupture has been affected by transversal structures: on the western side, the Judi lineament separates the main rupture zone from the nucleation area; on the eastern side, the Gaurishankar lineament separates the 25 April 2015 rupture from the 12 May 2015 (Mw 7.2) rupture. The origin of these lineaments is very complex: they are probably linked to pre-Himalayan faults that extend into the Indian shield beneath the MHT. These inherited faults induce transverse warping of the upper lithosphere beneath the MHT, control the location of lateral ramps of the thrust system and concentrate the hanging wall deformation at the lateral edge of the ruptures. The MHT is therefore segmented by stable barriers that define at least five patches in Central Nepal. These barriers influence the extent of the earthquake ruptures. For the last two centuries: the 1833 (Mw 7.6) earthquake was rather similar in extent to the 2015 event but its rupture propagated south-westwards from an epicentre located NE of Kathmandu; the patch south of Kathmandu was probably affected by at least three earthquakes of Mw ⩾ 7 that followed the 1833 event a few days later or 33 years (1866 event, Mw 7.2) later; the 1934 earthquake (Mw 8.4) had an epicentre ∼170 km east of Kathmandu, may have propagated

  18. Radiometric dating of brittle fault rocks; illite polytype age analysis and application to the Spanish Pyrenees.

    Science.gov (United States)

    van der Pluijm, B. A.; Haines, S. H.

    2008-12-01

    A variety of approaches have been available to indirectly date the timing of deformation and motion on faults, but few approaches for direct, radiometric dating of shallow crustal fault rocks were available until recently. The growing recognition of clay neomineralization at low temperatures in many fault rocks, particularly the 1Md illite polytype, allows the successful application of Ar dating to these K-bearing phases. In this presentation we will discuss our recent illite age analysis approach (sampling, treatments, analytical methods), and present new results from fault dating along the Spanish Pyrenean orogenic front as an example. X-ray quantification of polytype ratios in three or more size fractions is used to define a mixing line between (1Md illite) authigenic and (2M illite) detrital end-member phases that constrain the fault age and host rock provenance/cooling age for each fault. The common problem of recoil in clays is addressed by encapsulating samples before irradiation. Nine fault gouge ages in the south-central and south-eastern Pyrenees support several contractional pulses in the Pyrenean orogen: 1) Late Cretaceous thrusting (Boixols), 2) Latest Paleocene-Early Eocene deformation (Nogueres Zone and Freser antiformal stack), 3) Middle-Late Eocene deformation (Ripoll syncline, Vallfogona, Gavernie, Abocador and L'Escala thrusts), and 4) Middle Oligocene thrusting in the central portion of the Axial Zone (Llavorsi-Senet). The late Paleocene-Early Eocene and Middle-Late Eocene events may or may not be one single phase, due to slightly overlapping error estimates. The outboard thrusts give Hercynian ages for the detrital component of the fault rock, while the inboard thrusts, which juxtapose metamorphic units, give Cretaceous ages for the non-authigenic component, reflecting the cooling age of the adjacent wallrocks. Based on our latest work, the illite polytype dating method complements previously developed illite-smectite dating (van der Pluijm et

  19. INVERSÃO NEOTECTÔNICA DO RELEVO NA BACIA POTIGUAR, NORDESTE DO BRASIL

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    Rúbson Pinheiro Maia

    2014-04-01

    Full Text Available A maioria dos trabalhos de geomorfologia, desenvolvidos em bacias sedimentares discorrem sobre aspectos evolutivos com ênfase na dissecação, sem, no entanto abordar a gênese das morfoestruturas. Essas morfoestruturas correspondem às formas de relevo condicionadas pela reativação de falhas e demais deformações tectônicas. Exemplos dessas deformações podem ser encontrados nas bacias sedimentares do Nordeste brasileiro e tais estruturas estão condicionadas aos processos de reativação pós-rifte. Esses processos envolvem a reativação de falhas e dobras sob regime compressional e exercem suma importância na geração de estruturas deformacionais, na orientação de processos erosivos e no controle da drenagem. Nesse contexto, a Bacia Potiguar, situada na margem equatorial do Brasil, foi afetada por eventos deformacionais associados ao tectonismo cenozoico. Tais eventos geraram morfoestruturas que influenciam os processos de evolução geomorfológica da bacia, onde os campos de tensões cenozoicos foram responsáveis pelas deformações no topo da seção pós-rifte, originando antiformes dômicos que atualmente condicionam a drenagem, a dissecação e a deposição quaternária. Desse modo, na Bacia Potiguar, as principais unidades do relevo (Serras do Mel e de Mossoró e Vales dos Rios Mossoró e Açu apresentam evidências da participação do fator estrutural na sua gênese. Tal constatação advém da análise dos campos de tensões cenozoicos e sua repercussão no relevo, da caracterização da reativação de falhas neotectônicas, amplitudes altimétricas da seção pós-rifte e dos depósitos neógenos, quaternários e análise da rede de drenagem.

  20. Origin, evolution and sedimentary processes associated with a late Miocene submarine landslide, southeast Spain

    Science.gov (United States)

    Sola, F.; Puga-Bernabéu, Á.; Aguirre, J.; Braga, J. C.

    2018-02-01

    A submarine landslide, the Alhama de Almería Slide, influenced late Tortonian and early Messinian (late Miocene) sedimentary processes in the vicinity of Alhama de Almería in southeast Spain. Its 220-m-high headscarp and deposits are now subaerially exposed. The landslide occurred at the northern slope of the antecedent relief of the present-day Sierra de Gádor mountain range. This is a large antiform trending east-west to east-northeast-west-southwest, which has been uplifting since the late Miocene due to convergence of the African and Eurasian plates. During the Tortonian, this relief was an island separated from the Iberian Peninsula mainland by the Alpujarra corridor, a small and narrow intermontane basin of the Betic Cordillera in the western Mediterranean Sea. The materials involved in the slope failure were Triassic dolostones and phyllites from the metamorphic Alpujárride Complex and Tortonian marine conglomerates, sandstones, and marls that formed an initial sedimentary cover on the basement rocks. Coherent large masses of metamorphic rocks and Miocene deposits at the base of the headscarp distally change to chaotic deposits of blocks of different lithologies embedded in upper Tortonian marine marls, and high-strength cohesive debrites. During downslope sliding, coherent carbonate blocks brecciated due to their greater strength. Phyllites disintegrated, forming a cohesive matrix that engulfed and/or sustained the carbonate blocks. Resedimented, channelized breccias were formed by continuing clast collision, bed fragmentation, and disaggregation of the failed mass. The conditions leading to rock/sediment failure were favoured by steep slopes and weak planes at the contact between the basement carbonates and phyllites. Displacement of collapsed rocks created a canyon-like depression at the southeast edge of the landslide. This depression funnelled sediment gravity flows that were generated upslope, promoting local thick accumulations of sediments during

  1. New Constraints for Tectono-Thermal Alpine Evolution of the Pyrenees: Combining Zircon Fission-Track and (U-Th)/He Analyses with Raman Spectrometry and In-Situ K-Ar Geochronology

    Science.gov (United States)

    Waldner, M.; Bellahsen, N.; Mouthereau, F.; Pik, R.; Bernet, M.; Scaillet, S.; Rosenberg, C.

    2017-12-01

    The pyrenean range was formed by the convergence of European and Iberian plates following the inversion of the Mesozoic rifting in the north of Pyrenees. In the Axial Zone, the collision caused an antiformal nappe-stacking of tectonic units. Recent studies pointed out the importance of pre-collision structural and thermal inheritance that may play a major role for orogeny such as: 1) Paleozoic Variscan inheritance; 2) Mesozoic rift-related high geothermal gradients, which are maintained during the onset of convergence in the North Pyrenean Zone. From a mineralogical point of view, pre-collision feldspars have been destabilized and influenced the development of alpine phyllonite in brittle-ductile conditions which suggests a weak crustal behavior during the formation of the orogenic wedge. Our aim is to get a better understanding of alpine deformation and exhumation by coupling different thermochronological, geochronological and thermometric methods. We document the thermal evolution of each tectonic unit by using low-temperature thermochronometers (Zircon Fission Tracks, U-Th/He on zircons including laser ablation profiles). Our data on vertical profiles combined to existing dataset on apatite allows to model alpine exhumation across the Axial zone. Structural observations through alpine thrusts coupled to geochronology (in situ K/Ar on phengites), Raman and chlorite-phengite thermo(baro)metry provide new key data to unravel the alpine evolution of the Pyrenees. According to preliminary ZFT results on granite massifs in the central part of Pyrenean Axial zone (near ECORS profile), exhumation ages potentially indicates a migration of exhumation towards the south. Exhumation ages of the northern massifs seems to have preserved the North Pyrenean Cretaceous rift evolution. Further south, the onset of exhumation is as old as Paleocene, which precedes the Eocene ages of the literature. The low burial estimated in the northern massifs may indicate a high thermal gradient

  2. John Dewey's conception of application of law in its philosophical and social context

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    Spaić Bojan

    2008-01-01

    Full Text Available John Dewey, one of the most important thinkers of pragmatism, elaborated a specific conception of law partially and gradually in the long course of his intellectual career. This part of his broader philosophical outlook is analyzed here through one of its most important segments - application of law - and interpreted in its historical, social and cultural background. The first part of the article concentrates on the 'objective' (cultural, social and historical reasons for giving emphasis to the application of law in his legal philosophy. This domination of the application of law in his legal thought is derived from the needs of a rapidly changing structure of the American society in the first half of the XX century, and theoretically has its place in an all around phenomenon in American intellectual history in general that Morton White terms antiformalism. The second part of the article analyses his legal conceptions and their connection with the general philosophical position of this pragmatist. Dewey formed his conception of application of law as an integral part of his broader philosophical standpoint, and especially on the basis of his radical reinterpretation of logic and truth. Since his understanding of the legal process has roots in his experimentalist conception of logic that encompasses the apprehension of the process of experimentation as the only warrant for the validity of propositions (that the 'truth' of a proposition is built in the process of its verification, he regards application as conditio sine qua non of the legality of norms in general. This leads us to the last part of the article that scathes possible lines of critical approach to Dewey's work in this field. The view that the legality of norms is derived from their application is in legal theory often regarded as sociologism, inasmuch as it disregards the normative aspects of the legal process and emphasizes the social ones to the point of making it void of the

  3. Prevalência de lesões labiais em trabalhadores de praia e fatores associados Prevalencia de lesiones labiales en trabajadores de playa y factores asociados Prevalence and factors associated with orolabial lesions in beach workers

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    Eudes Euler de Souza Lucena

    2012-12-01

    Full Text Available OBJETIVO: Analisar a prevalência de lesões labiais decorrentes da exposição solar e potenciais associações em trabalhadores de praia. MÉTODOS: Estudo transversal com 362 trabalhadores de cinco praias urbanas em Natal, RN, de agosto a dezembro de 2010. Os participantes responderam um questionário validado com dados pessoais, de ocupação e de saúde e passaram por exame clínico dos lábios feito por pesquisadores calibrados. As possíveis associações das variáveis sociodemográficas, ocupacionais e de saúde geral com a presença de lesões labiais foram avaliadas pelo teste do qui-quadrado para um nível de significância de 5%. A análise multivariada foi feita utilizando-se a regressão robusta de Poisson. RESULTADOS: Dos trabalhadores examinados, 27,1% apresentavam lesões labiais. Desses, 76,8% eram do sexo masculino; 61,6% tinham pele morena ou negra; 94,5% trabalhavam informalmente; e 85,4% trabalhavam expostos ao sol. A maioria (81,1% relatou uso de algum tipo de fotoproteção: protetor solar (38,7%; protetor labial (15,3%; boné/chapéu (72,4%. Aproximadamente 28% eram fumantes e 48% consumiam álcool regularmente. A fotoproteção com uso de boné/chapéu foi associada à presença de lesões labiais decorrentes da exposição solar. CONCLUSÕES: Observou-se alta prevalência de lesões labiais nos indivíduos expostos ao sol, a qual foi associada ao uso de boné/chapéu como forma de fotoproteção.OBJETIVO: Analizar la prevalencia de lesiones labiales productos de la exposición solar y potenciales asociaciones en trabajadores de playa. MÉTODOS: Estudio transversal con 362 trabajadores de cinco playas urbanas en Natal, RN, Brasil, de agosto a diciembre de 2010. Los participantes respondieron un cuestionario validado con datos personales, de ocupación y de salud y se evaluaron a través de exámenes clínicos realizados por investigadores calibrados. Las posibles asociaciones de las variables sociodemogr

  4. Valores de aminoácidos digestíveis verdadeiros e equações de predição dos aminoácidos digestíveis do grão e de subprodutos do trigo para aves Values of true digestible amino acids and prediction equations of digestible amino acids of wheat grain and wheat by-products for poultry

    Directory of Open Access Journals (Sweden)

    Ricardo Vianna Nunes

    2001-06-01

    Full Text Available Foram determinados os coeficientes de digestibilidade verdadeira dos aminoácidos e elaboradas equações de predição dos valores de aminoácidos digestíveis utilizando a composição química de 11 alimentos. Os alimento avaliados foram: farinha morena, farinha de trigo, trigo-grão, triguilho, gérmen de trigo, resíduo de biscoito, resíduo de macarrão e quatro farelos de trigo. Foi utilizado o método de "alimentação forçada" com galos cecectomizados. O delineamento experimental utilizado foi o inteiramente casualizado, com 11 alimentos e um tratamento-jejum, seis repetições e um galo por unidade experimental. Os coeficientes médios de digestibilidade verdadeira dos aminoácidos para farelo de trigo 1, farelo de trigo 2, farelo de trigo 3, farelo de trigo 4, farinha morena, farinha de trigo, resíduo de biscoito, resíduo de macarrão, trigo-grão, triguilho e gérmen de trigo foram 80,1; 76,7; 71,8; 74,5; 84,1; 94,1; 77,9; 90,1; 86,0; 90,3; e 93,1%, respectivamente. As equações de predição que melhor estimaram os valores de aminoácidos digestíveis verdadeiros foram aquelas que continham os conteúdos de proteína bruta (PB e, ou, extrato etéreo (EE, para o aminoácido lisina, e proteína bruta (PB e, ou, fibra em detergente neutro (FDN, para os aminoácidos metionina, metionina + cistina e treonina e a média dos aminoácidos essenciais, sendo as equações: Lis = -0,8805 + 0,0755*PB + 0,0268*EE (R² = 98%, Met = -0,0377 + 0,0183*PB - 0,0020*FDN (R² = 99%, M+C = 0,0982 + 0,0273*PB - 0,0021*FDN (R² = 92%, Treo = -0,2107 + 0,0401PB - 0,0020*FDN (R² = 96%, Essen = -0,1530 + 0,0451*PB - 0,0024*FDN (R² = 98%.The true digestibility coefficients of amino acids (TDCaa were determined and digestible amino acids prediction equations obtained, using the chemical composition of 11 feedstuffs. The feedstuffs evaluated were: brown flour meal, wheat flour, wheat grain, wheat grain residue, wheat germ, cookies residue, macaroni residue

  5. Heat transformers simulation coupled to industrial processes and experimental evaluation of a thermal transformer of two KW power; Simulacion de transformadores de calor acoplados a procesos industriales y evaluacion experimental de un transformador termico de dos kw de potencia

    Energy Technology Data Exchange (ETDEWEB)

    Cerezo Roman, Jesus

    2001-12-15

    recovering temperature and between 42% and 96% at high temperature for the use of this additives. [Spanish] La quema de combustibles primarios en los diferentes sectores industriales y de transporte, han provocado grandes problemas de salud a la humanidad y contaminacion al medio ambiente, debido principalmente a sus altas emisiones de sustancias y gases, ademas de problemas socioeconomicos en muchos paises. Debido a esto, muchos paises estan investigando nuevas tecnologias alternas para su sustitucion. Uno de los principales tecnologias propuestas son los transformadores de calor. Estos equipos son capaces de ahorrar energia calorifica principalmente en procesos industriales. Debido a esto, estas tesis realiza estudios teoricos de transformadores de calor en procesos industriales tipicos de la region como es la destilacion de derivados de petroleo y refinacion de azucar morena, para observar la energia que puede ser ahorrada por el uso de estos equipos. Por otra parte se realizo una evaluacion experimental de un transformador de calor con aditivos debido a que aumentan la absorcion en el absorbedor, mejorando el coeficiente de operacion. En la simulacion de la columna de destilacion de petroleo se utilizo el simulador de procesos quimicos Aspen Plus version 9.3-2, debido a que este tiene modelos termodinamicos muy confiables para estudiar el comportamiento de cada uno de sus componentes. Los resultados mostraron que con el transformador de calor de una etapa operando con la mezcla LiBr-H{sub 2} O se puede ahorrar hasta un 45% de la energia suministra a la caldera y hasta un 32% con el transformador de doble absorcion. Para la modelacion de la refineria del azucar morena se uso el paquete Visual Basic, version 6.2. El paquete fue utilizado debido a que es un lenguaje grafico y de facil manejo. Los resultados mostraron que se puede recuperar hasta un 15% de la energia suministrada a la caldera. En la experimentacion se utilizo la mezcla bromuro de litio-agua y bromuro de

  6. Presa de Migoelou

    Directory of Open Access Journals (Sweden)

    Legros, H.

    1963-11-01

    constituye una gran reserva de energía. El terreno de asiento de cimientos es granítico, recubierto por una morena de 20 m de potencia máxima. Las bóvedas, de 25 m de luz, se han dispuesto según las alineaciones rectas, debido a la configuración del terreno. Su espesor, en un plano horizontal, es de 1 m, y su talud, aguas arriba, de 0,60x1. Los contrafuertes tienen espesor constante de 2 m. El que se ha levantado en la unión de las dos alineaciones antes referidas, se ha calculado como un estribo y en las condiciones de estabilidad más desfavorables. Los cálculos estáticos se han realizado admitiendo una temperatura variable de — 15 °C a + 35 °C y despreciando el empuje que pudieran ocasionar los hielos. Completan este aprovechamiento otras presas de menor consideración. Los trabajos iniciales se dedicaron a la habilitación de accesos. Dada la gran altitud del paraje, fue preciso construir un teleférico.

  7. Rovesciamento e alterazione nei racconti Uranio, Vanadio e in Auschwitz, Città Tranquilla

    Directory of Open Access Journals (Sweden)

    Fausto Maria Greco

    2016-11-01

    Full Text Available Ne Il sistema periodico accade che i processi dell’alterazione e del rovesciamento investano le funzioni stesse della narrazione e della testimonianza. In Uranio il personaggio di Bonino, narratore inattendibile, è un doppio rovesciato di Primo Levi. Egli realizza uno degli incubi dello scrittore torinese, quello di raccontare l’esperienza vissuta nel lager e di non essere creduto, ma l’effetto di rovesciamento riguarda anche altri versanti della scrittura. Come Elie Wiesel nel racconto intitolato Barbara, incluso nella raccolta de L’ebreo errante del 1966, Levi prende le distanze, in Uranio, da una memoria che falsifica, che oltrepassa la barriera della verità per costruire un’immagine eroica dei sopravvissuti. Nell’opera di Levi le figure di doppi rovesciati segnalano rischi incombenti, ipotesi inquietanti; i processi di alterazione, invece, si adattano meglio allo sforzo di conoscenza che riguarda l’universo concentrazionario. In questo rapporto stanno il Bonino di Uranio e il Cerrato di Argento, il dottor Müller di Vanadio (ancora ne Il sistema periodico e l’ingegner Mertens del racconto di Auschwitz, città tranquilla (pubblicato nell’84 e aggiunto ai Racconti e saggi. Dietro i nomi di Müller e di Mertens si celano, però, figure in carne e ossa con le quali lo scrittore è entrato in contatto. Il capovolgimento rivela un’ipotesi provocatoria, una vertigine del pensiero, nel caso di Mertens; l’alterazione apre alla conoscenza etica nella vicenda di Müller.The study focuses on the methods of alteration and overturning that influence functions of narration and testimony in Primo Levi’s Il sistema periodico (1975. In the short story Uranio, the character of Bonino is an unreliable storyteller as well as an overturned double of the writer. Bonino represents one of Levi’s obsessions, i.e., not being believed when telling the experience of prison and extermination camps. The effect of overturning also regards

  8. Modelación y análisis de susceptibilidad a la deformación permanente de mezclas asfálticas Modeling and analysis of susceptibility to permanent deformation in asphalt mixtures

    Directory of Open Access Journals (Sweden)

    Julián Vidal V

    2011-08-01

    Full Text Available La deformación permanente de mezclas asfálticas del Área Metropolitana del Valle de Aburra - Antioquia, las cuales se fabrican en nuestro medio bajo las especificaciones INVIAS (Instituto Nacional de Vías y del Valle de Aburrá, se estudiaron utilizando un modelo constitutivo propuesto anteriormente. Este modelo mostró previamente ser efectivo en predecir la deformación de mezclas asfálticas en el Reino Unido bajo diferentes tipos de carga bajo condiciones uniaxiales y triaxiales, y temperaturas comprendidas entre 0 °C y 40 °C. Para el caso de las mezclas del Valle de Aburrá se emplearon temperaturas en un intervalo de 20 °C a 50 °C y se implementó el modelo propuesto con el fin de predecir la susceptibilidad a la deformación permanente. Mediante el estudio experimental de las mezclas se encontró que el comportamiento de estado estable de estas siguió el modelo modificado de Cross (Wang, 2011, con las mezclas exhibiendo comportamiento viscoso lineal y no-lineal a bajos y altos niveles de esfuerzos, respectivamente. Tanto para condiciones de carga como de recuperación se observó una dependencia de la temperatura en el material que fue adecuadamente predicha por el modelo de Arrheniusbajo el intervalo de temperaturas estudiado. Al realizar la modelación del comportamiento de las mezclas se encontró que el modelo propuesto por Ossa et al. (2010 aplica a las mezclas estudiadas y se determinó que la susceptibilidad a la deformación de estas varía considerablemente dependiendo de los materiales utilizados por el productor y en especial el agregado empleado, a pesar de ser mezclas teóricamente similares.Permanent deformation of asphaltic mixtures in the Metropolitan Area of Valle de Aburra - Antioquia, which are built under IVIAS' specifications (Instituto Nacional de Vías and Valle de Aburrá, were studied by employing a constitutive model proposed previously. This model had proved to be effective in predicting deformations of

  9. Contribution to the radiological study of the eosinophilic granuloma of the mandible (Unifocal granuloma due to Langherans' cell histiocytosis); Contributo allo studio radiologico del granuloma eosinofilo della mandibola (granuloma unifocale da istiocitosi delle cellule di Lagherhans)

    Energy Technology Data Exchange (ETDEWEB)

    Chigi, Gino; Pastremoli, Alessandro; Pisi, Paolo; Pastremoli, Alfredo [Bologna Univ., Bologna (Italy). Dipartimento di scienze odontomastologiche; Bianchi, Giuseppe [Istituti Ortopedici Rizzoli, Bologna (Italy)

    2005-04-01

    non completamente risolto per talune condizioni patologiche, nelle quali i dati obiettivi ed anamnestici sono relativamente uniformi e il quadro radiologico privo di qualsiasi caratteristica. Materiale e metodi: Il materiale � costituito da sei casi di istiocitosi delle cellule di Langherans della mandibola osservati nell'arco di un decennio. Lo studio � basato sulla valutazione della documentazione radiologica tradizionale. Le radiografie sono state eseguite in proiezione latero-laterale-obliqua che, come noto, libera quasi completamente la porzione orizzontale della mandibola dalla sovrapposizione delle immagini di altre strutture ossee. Risultati: I risultati delle indagini radiologiche sono riportati nella tabella I. Si tratta di reticoloendoteliopatie capaci di dar luogo ad un processo granulomatoso costituito da polinucleati eosinofili, plasmacellule e linfociti e, fondamentalmente, da grandi cellule istiocitarie mononucleate dotate di attivit� granulopessica e fagocitaria, spiccatamente proliferanti nel tessuto osseo, identificabili con le cellule di Langherhans della pelle, delle mucose, degli spazi periodontali, del midollo osseo. Il tessuto granulomatoso che ne deriva si infiltra tra gli elementi costitutivi dell'organo colpito ed estendendosi comprime, atrofizza e tende a distruggere il tessuto, sostituendosi ad esso. Le alterazioni determinate dal granuloma isiocitario di Langherhans prevalgono nettamente nel sistema scheletrico e si verificano, in ordine di frequenza, nel cranio, nelle ossa lunghe dell'estremit�, nel piede, nelle coste e nella colonna vertebrale. L'interessamento della mucosa orale � eccezionale. Conclusioni: Nel granuloma istiocitario unifocale di Langherhans della mandibola l'indagine radiologica � indispensabile per l'approccio allo studio della tumefazione premandibolare fermo restando che la diagnosi di natura si basa esclusivamente sulla biopsia. Oltre all'esame radiologico digitale o

  10. Prograde and retrograde metamorphic processes in high-pressure subduction zone serpentinites from East Thessaly, Greece

    Science.gov (United States)

    Koutsovitis, Petros

    2016-04-01

    The East Thessaly region, Central Greece, includes metaophiolitic mélange formations which extend from the eastern foothills of Mt. Olympus and Ossa, throughout the Agia basin, Mt. Mavrovouni (Sklithro region), South Pelion and reaching up to northeast Othris (regions of Aerino and Velestino). They appear in the form of dispersed and deformed thrust sheets having been variably emplaced onto Mesozoic platform series rocks of the Pelagonian tectonostratigraphic zone[1]. These formations consist mainly of serpentinites, as well as metasediments, metagabbros, metadolerites, rodingites, ophicalcites, talc-schists and chromitites. Based upon petrographic observations, mineral chemistry data and XRD patterns, the subduction zone-related serpentinites from the regions of Potamia, Anavra, Aetolofos and Kalochori-Chasanbali (Agia basin), as well as from the regions of Aerino and Velestino, are characterized by the progressive transformation of lizardite to antigorite and are distinguished into two groups. The first group includes serpentinites from the metaophiolitic formations of Potamia, Anavra, Aerino and Velestino, which are marked by destibillization of lizardite to antigorite, mostly along the grain boundaries of the lizardite mesh textured relics. The presence of lizardite and antigorite in almost equal amounts indicates medium-temperature blueschist facies metamorphic conditions (˜340-370 ° C; P≈10-11 kbar)[2,3,4]. The second serpentinite group appears in the regions of Aetolofos and Kalochori, characterized by the predominance of antigorite, the minor occurrence of lizardite and the complete replacement of spinel by Cr-magnetite. The absence of metamorphic olivine suggests that these serpentinites were most likely formed at slightly higher temperature and pressure conditions compared to the first serpentinite group, corresponding to medium or high temperature blueschist facies metamorphism (˜360-380 ° C; P≈12 kbar)[2,3,4]. These metamorphic conditions are

  11. Development of the cetacean nasal skull.

    Science.gov (United States)

    Klima, M

    1999-01-01

    processus paraseptalis posterior, the crista semicircularis, the frontoturbinale, the ethmoturbinale I and the maxilloturbinale. The cartilaginous structures are largely accompanied by the dermal bone, the maxillare. Of these embryonic elements, very little is preserved in adult cetaceans. The cartilages of the cupula nasi anterior form the variable skeleton around the nostrils. In Physeter the tectum nasi forms a very long cartilaginous bar that passes through the whole giant anterior head of the sperm whale as a structure accompanying the left nasal passage. 3. The anterior side wall structures. These include the cartilaginous structures, viz., the cartilago ductus nasopalatini, the cartilago paraseptalis, the processus lateralis ventralis and the lamina transversalis anterior, accompanied by the dermal bones, the praemaxillare and the vomer. These structures participate in the formation of the robust rostrum of the cetacean skull, and they are partly preserved even in adults in the form of the isolated ossa pararostralia (the Meckelian ossicles). The comparison of morphogeny of the nasal skull has also made it possible to draw certain conclusions on the phylogeny and systematics of Cetacea. Already the earliest embryonic stages permit us to discern weighty transformations of the original nasal skull of land mammals. These transformations are common to all embryos examined. This fact indicates a common origin of all Cetacea, which thus form a single monophyletic order. However, later embryonic stages show some different modifications of the nasal capsule according to which at least three major groups can be distinguished within the order Cetacea, probably ranking as superfamilies: Balaenopteroidea, Physeteroidea and Delphinoidea. Our observations, being in full accordance with other morphological, and embryological, as well as molecular biological results, suggest that the division of the order Cetacea into two suborders, Mysticeti and Odontoceti, is no longer tenable.

  12. Segnalazioni/Informes/Rapports/Reports

    Directory of Open Access Journals (Sweden)

    Emanuele Monegato

    2013-12-01

    Full Text Available di Elisa Cairati, Paolo Caponi, Emanuele Monegato, Anna Pasolini   Amy Stewart, Wicked Plants, London, Timber Press, 2010, 236 pp. ISBN 978-160-469-127-6 Andrea Corrado e Igor Mariottini, Cinema e autori sulle tracce delle migrazioni, Roma, Ediesse, 2013, 155 pp. ISBN 978-882-301-625-5 Carlos Busqued, Sotto questo sole tremendo, Roma, Atmosphere libri, 2012, 141 pp. ISBN 978-88-6564-032-6 Doménico Chiappe, Tan real como la ficción (Herramientas narrativas en periodismo, Barcelona, Editorial Laertes, 2010, 197 pp. ISBN 978-84-7584-704-7 Eduardo Huarag Álvarez, La cultura oral en la narrativa hispanoamericana, Lima, Editorial San Marcos, 2011, 293 pp. ISBN 978-612-302-537-3 Eduardo L. Holmberg, Le ossa, Salerno, Edizioni Arcoiris, 2012, 114 pp. ISBN 978-88-96583-28-9 Guido Bonsaver, Mussolini censore. Storie di letteratura, dissenso e ipocrisia, Bari, Laterza, 2013, 230 pp. ISBN 9788858106624 Leila Guerriero, Frutos extraños (crónicas reunidas 2001-2008, Madrid, Alfaguara, 2009, 400 pp. ISBN 978-84-204-0371-7 Marco Di Domenico, Italiani Pericolosi, Torino, Bollati Boringhieri, 2012, 254 pp. ISBN 978-883-392-335-2 Margo Lanagan, Tender Morsels, New York, Alfred A. Knopf, 2008, 464 pp. ISBN 978-0-375-84305-1 María Caballero Wangüemert, Las trampas de la emancipación. Literatura femenina y mundo hispánico, Madrid, Biblioteca Nueva/Minerva, 2012, 363 pp. ISBN 978-84-9940-529-2 Maria Cristina Paganoni, Representing the City. Linguistic Perspectives,Discursive Strategies and Multimodality in City Branding, Bergamo, Lubrina Editore, 2012, 148 pp. ISBN 978 88 7766 464 8 Michael Denning, Cover Stories. Narrative and Ideology in the British Spy Thriller, London, Routledge, 1987, 168 pp. ISBN 0-7100-9642-9; John G. Cawelti, Bruce A. Rosenberg, The Spy Story, Chicago and London, The University of Chicago Press, 1987, 270 pp. ISBN 0-226- 09868-0 Nicoletta Vallorani, Millennium London. Of Other Spaces and the Metropolis, Milano/Udine, Mimesis, 2012

  13. 1.90–1.88 Ga arc and back-arc basin in the Orijärvi area, SW Finland

    Directory of Open Access Journals (Sweden)

    Markku Väisänen

    2002-01-01

    Full Text Available The Orijärvi area within the Uusimaa Belt is a key area in resolving the stratigraphy and tectonic setting of the Southern Svecofennian Arc Complex in southern Finland. Based on field relationships, geochemistry and radiometric age determinations, the area can be divided into four formations. The bimodal Orijärvi formation, lowermost in stratigraphy, is exposed in an antiform containing thesynvolcanic Orijärvi granodiorite in its core. Basalts have high LILE/HFSE ratios with pronounced negative Nb-Ta anomalies. The basalts in the lower part of the Orijärvi formation are geochemically less evolved than the basalts and basaltic andesites at higher levels. A rhyolite from a low stratigraphic level in the Orijärvi formation yielded a U-Pb zircon age of 1895.3±2.4 Ma. The Kiskoformation stratigraphically overlies the Orijärvi formation and the compositions of the volcanic rocks range from basalts to rhyolites. These mafic and intermediate rocks also show high LILE/HFSE ratios but the total element abundances are higher and show a more pronounced LREE enrichment, compared to the Orijärvi formation, indicating an evolved magma system. A dacite from the upper part of the Kisko formation yielded a U-Pb zircon age of 1878.2±3.4 Ma. TheSalittu formation probably overlies the Kisko formation. It mainly comprises picrites and tholeiitic pillow lavas with mica gneisses and minor marbles as intercalations. It differs from the underlying formations showing higher Mg, Ti and Zr contents and higher LILE/HFSE ratios. The major and trace element compositions indicate an oceanic affinity. The Toija formation evidently underlies the Salittu formation and comprises mafic pillow lavas, rhyolites, marbles, andone picritic horizon. The geochemical characteristics are transitional between the Salittu and Orijärvi/Kisko formations. All the formations contain both concordant and crosscutting intrusive rocks, some of which are comagmatic with the volcanic rocks. In

  14. Detrital zircon provenance from the Atomfjella Complex and Mosselhavøya Group, northern Ny Friesland, Svalbard

    Science.gov (United States)

    Bazarnik, Jakub; McClelland, William C.; Majka, Jarosław; Kośmińska, Karolina; Piepjohn, Karsten

    2017-04-01

    Northern Ny Friesland is underlain by metamorphic tectonites broadly assigned to the Atomfjella Complex and Mosselhalvøya (Planetfjella) Group within Svalbard's Eastern Caledonian Basement Province. The Atomfjella Complex is dominated by orthogneiss and psammitic metasedimentary rocks exposed within the ca. 150 km long, north-south trending Atomfjella Antiform. The Mosselhalvøya Group is composed of semipelite, psammite, and subordinate marble and plagioclase-rich schist. The Mosselhalvøya Group is juxtaposed with the Atomfjella Complex along an east-dipping reverse fault. Detrital zircons from 6 samples of the Atomfjella Complex and 2 samples of the Mosselhavøya Group were analyzed for U/Pb by laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) at the Arizona LaserChron Center. Samples of the Polhem and Bangenhuk units of the Atomfjella Complex yielded euhedral oscillatory zoned zircon grains that define unimodal peaks at 1730 and 1755 Ma, respectively. Samples from the Sørbreen and Vassfaret units of the Atomfjella Complex contained subround oscillatory zoned zircon grains with very thin CL-bright rims. Both samples define prominent peaks at ca. 1740, 1970 and 2650-2750 Ma and lesser peaks at 2400-2500, 2900-3000, and 3100-3300 Ma. A similar distribution is observed for a sample from the Smutsbreen unit of the Atomfjella Complex, but additional peaks are observed at 1230 and 1460 Ma. Zircons from the Smutsbreen sample are also texturally similar but also contain obvious rounded zircon fragments that are lacking in the Sørbreen and Vassfaret populations. Samples from the Flåen and Vildadalen Formations of the Mosselhalvøya Group yielded subround to round, oscillatory zoned grains with no or very thin metamorphic rims. Rounded zircon fragments are abundant in both samples. The zircon characteristics and age distributions of the Mosselhalvøya Group samples are similar to those from a sample of the Rittervatnet unit of the Atomfjella

  15. Paleomagnetic and chronostratigraphic constraints on the Middle to Late Miocene evolution of the Transylvanian Basin (Romania): Implications for Central Paratethys stratigraphy and emplacement of the Tisza-Dacia plate

    Science.gov (United States)

    de Leeuw, Arjan; Filipescu, Sorin; Maţenco, Liviu; Krijgsman, Wout; Kuiper, Klaudia; Stoica, Marius

    2013-04-01

    constrained between the first occurrence (FO) of Orbulina suturalis at 14.56 Ma and 14.38 ± 0.06 Ma. During the subsequent Badenian Salinity Crisis (BSC) up to 300 m of salt accumulate in the basin center. The faunal turnover that marks the Badenian-Sarmatian Boundary is dated at 12.80 ± 0.05 Ma. A second phase of intense volcanism occurs at 12.4 Ma and leads to deposition of the middle Sarmatian tuff complex (Ghiriş, Hădăreni, Turda and Câmpia Turzii tuffs). Rates of sediment accumulation strongly diminish in the basin center at the onset of the Pannonian stage coincident with an approximately 20° CW tectonic rotation of the Tisza-Dacia plate. Concurrent enhanced uplift in the Eastern a'nd Southern Carpathians leads to the isolation of the Central Paratethys and triggers the transition from marine to freshwater conditions. An additional Pannonian to post-Pannonian 6° of CW rotation is related to the creation of antiform geometries in the Eastern Carpathians which are notably larger in the north than in the south. An 8.4 Ma age is determined for the uppermost Pannonian sediments preserved in the central part of the Transylvanian Basin. Two sections belonging to middle Pannonian Zone D, and the lower part of Zone E (Subzone E1) are found to cover the 10.6-9.9 Ma time-interval.

  16. Linking Anisotropy of Magnetic Susceptibility (AMS) to transport direction: The Gavarnie Thrust, Axial Zone, Pyrenees

    Science.gov (United States)

    Marcén, Marcos; Casas-Sainz, Antonio; Román-Berdiel, Teresa; Soto, Ruth; Oliva-Urcía, Belén

    2017-04-01

    This work deals with the application of the anisotropy of magnetic susceptibility (AMS), structural analysis and microstructural analysis to the study of shear zones. Mylonitized fault rocks have been sampled in the Gavarnie Trust, one of the main structures of the Pyrenean Axial Zone, which was structured as a south-verging antiformal stack during the Alpine Orogeny. In the studied area, the Gavarnie Unit (Silurian-Carboniferous, low grade metasedimentary rocks) overthrust the Millares and Bielsa Units (Permian and Cretaceous cover, Cambro-Ordovician medium grade metamorphic rocks and granitoids), with a minimum horizontal displacement of 12km. Three profiles of the shear zone were studied with the goal of observing changes in the transport direction, the strain distribution and the orientation of the magnetic ellipsoid., One profile is parallel to the basal thrust plane, where the core zone has been identified, and the other two are vertical transects (profiles 1 and 2), perpendicular to the thrust plane. The shear zone, developed into the hangingwall phyllitic Silurian and Devonian units, is at least 30 m wide. The structural analysis reveals that the Silurian rocks are the local detachment level, which becomes thinner and pinchs out completely towards the South, where the detachment level is within the Devonian units (Fourche de la Sede Fm.). In both vertical profiles, the shear zone shows a decrease in the strain from the contact with the Cretaceous limestones at the footwall, towards the upper limit of the shear zone. This is evidenced by the lower development of mylonitic foliations and SCC' structures and the upwards increase of brittle deformation. The transport direction inferred from SC structures (stretching lineations in S and C planes) is constant in all sites, with an average of N190E. AMS data are in perfect agreement with the structural analysis, being the magnetic foliation parallel to the S or C planes of the SC structures. The magnetic

  17. From 2012 HAITI-SIS Survey: thick-skin versus thin-skin tectonics partitioned along offshore strike-slip Faults-Haïti

    Science.gov (United States)

    Ellouz, N.; Leroy, S. D.; Momplaisir, R.; Mercier de Lepinay, B.

    2013-12-01

    pathway changes. Geochemical signature and temperature of the fluids and gas, change drastically depending on location and depth provenance. Our first results show that 1) the present-day EPGF geometry results from oblique shortening processes along different segments of the fault. Deep basins previously localized south and north of the fault are inverted at different degrees, 2) the Gonâve Island is only the emerged part of a NW-SE, either growing large " anti-formal stack" or basement inversion responsible for the large present-day fold amplitude, or both of them successively. It separates two sub-basins South and North Gonâve with independant sedimentary and deformation evolution 3) the Jeremie Basin probably has a specific long-living evolution, allowing to precise the geodynamic evolution of the Western Hispaniola Margin.

  18. Seismic Slip on an Oblique Detachment Fault at Low Angles

    Science.gov (United States)

    Janecke, S. U.; Steely, A. N.; Evans, J. P.

    2008-12-01

    Pseudotachylytes are one of the few accepted indicators of seismic slip along ancient faults. Low-angle normal faults have produced few large earthquakes in historic times and low-angle normal faults (detachment faults) are typically severely misoriented relative to a vertical maximum compressive stress. As a result many geoscientists question whether low-angle normal faults produce earthquakes at low angles. Relationships in southern California show that a major low-angle normal-oblique fault slipped at low angles and produced large earthquakes. The exhumed Late Cenozoic West Salton detachment fault preserves spectacular fault- related pseudotachylytes along its fault plane and injected into its hanging wall and footwall. Composite pseudotachylyte zones are up to 1.25 m thick and persists over lateral distances of at least 10's of meters. Pseudotachylyte is common in most thin sections of damaged fault rocks with more than 20% (by volume) of cataclasite. We recognized the presence of original melt using numerous criteria: abundant spherulites in thin sections, injection structures at both the thin-section and outcrop scale, black aphanitic textures, quenched vein margins, variations in microcrystallite textures and/or size with respect to the vein margin, and glassy textures in hand sample. Multiple earthquakes are inferred to produce the layered "stratigraphy" in some exposures of pseudotachylytes. We infer that the West Salton detachment fault formed and slipped at low angles because it nearly perfectly reactivates a Cretaceous ductile thrust system at the half km scale and dips between 10 and 45 degrees. The about 30 degree NNE dip of the detachment fault on the north side of Yaqui Ridge is likely steeper than its dip during detachment slip because there is local steepening on the flanks of the Yaqui Ridge antiform in a contractional stepover of a crosscutting Quaternary San Felipe dextral fault zone. These relationships indicate a low dip on the detachment

  19. The evolution of shallow crustal structures in early rift-transform interaction: a case study in the northern Gulf of California.

    Science.gov (United States)

    Farangitakis, Georgios-Pavlos; van Hunen, Jeroen; Kalnins, Lara M.; Persaud, Patricia; McCaffrey, Kenneth J. W.

    2017-04-01

    end, and is an active rift. The second structural domain is a large, NE-SW-trending anticlinorium 60 km wide to the southeast of the rift zone, towards the Tiburon basin. One possibility is that it represents a positive flower structure and thus indicates a transpressional domain. However, individual structures within the broader zone are normal faults and negative flower structures, suggesting transtensional deformation, and the overall structure may be a roll-over antiform formed on a deep detachment structure. Finally, a strike-slip-dominated zone occurs along the northward continuation of the Ballenas Transform Fault. This is accompanied by the formation of submarine volcanic knolls. These patterns can be compared with seismic stratigraphy facies and structural patterns in mature transform margins and potentially give insight into their early history.

  20. 3D deformation in strike-slip systems: Analogue modelling and numerical restoration Deformación 3D en sistemas de rumbo: modelación analógica y restauración numérica

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    Daniel González

    2012-05-01

    Full Text Available Regional and local strike-slip systems in Chile are complex and pose interesting questions, such as the interaction between strike-slip and reverse faults, how they evolve, and the relationship between shortening, rotation and uplift. Within this context, we developed a new analytical method based on analogue and numerical modelling applied to 3D, pure and transtensional-transpressional strike-slip systems. Analogue modelling results indicate that in restraining stepovers of strike-slip fault systems, where antiformal pop-up structures are usually formed, pre-existent basement structures with a high angle to the main strike-slip fault will generate a higher rotation of blocks. However, when these structures are oriented at a high angle with respect to the main stress convergence vector, the rotation will be less and therefore a higher tendency to uplift will be produced. These results were applied to NW- and SE-striking basement faults oblique to N-S mega-thrust faults in central Chile (32°-35°S, for which we propose a simultaneous development based on the analogue model results. Moreover, we propose that strike-slip movement occurred on thrust faults in central Chile. Furthermore, we performed a numerical restoration of an analogue experiment which modeled a pure strike-slip system, and concluded that the restoration is very sensitive to shortening data as well as to rotational data. These results are extremely important for future numerical and regional analysis of strike-slip systems.Los sistemas de rumbo regionales y locales en Chile son complejos y plantean interesantes preguntas, tales como la interacción entre fallas de rumbo y fallas inversas, cómo evolucionan ellas, y la relación entre acortamiento, rotación y alzamiento. En este contexto, desarrollamos un nuevo método analítico basado en modelamiento analógico y numérico de sistemas de rumbo de cizalle puro y sistemas transpresionales-trantensionales en 3D. Los resultados del

  1. Patterns of deformation, exhumation and uplift across the Island of Timor: insights into the processes that control the early stages of orogenesis (Invited)

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    McQuarrie, N.; Tate, G. W.; Van Hinsbergen, D. J.; Harris, R. A.

    2013-12-01

    On the island of Timor, arc-continent collision between the Banda volcanic arc and the Australian continent since the late Miocene has uplifted a mountain range containing both deeply exhumed metamorphic rocks and deepwater synorogenic basins. These varied lithologies are separated by a few tens of kilometers, and provide us with an opportunity to examine the spatial patterns of differential uplift and exhumation and its links to the geometry and magnitude of deformation in an orogen that is still in its infancy. New mapping in Timor has provided a detailed view of how the Australian continental slope and shelf rocks are being structurally repeated below overriding Banda Arc material. In East Timor, a window though the Banda terrane shows Permian and Triassic rocks that are repeated by four NNE-striking thrust faults with ~3 km spacing and 50-75 km along-strike extent. The strike of these faults is rotated 50-60 degrees compared to structures to the east and west of this main window. In addition, mapped fold axes are shown to cut across and warp fault traces. These map patterns indicate that the duplex has been both refolded and tilted since its initial formation. In West Timor, Permian through Triassic stratigraphy is faulted and folded into an antiformal stack with 5 exposed thrusts repeating an ~ 3 km thick section. Both south of and adjacent to these structural highs are 10-20 km wide piggyback basins of deepwater, synorogenic marine limestones and clays that coarsen upward into turbidites. Deposition of these units initiated at 5.5 Ma at lower bathyal depths. Synorogenic deposition directly over the Bobonaro mélange, which acts as the décollement between the overthrust Banda Arc rocks and the structurally repeated Australian margin rocks, requires the removal of both Banda arc material and the Cretaceous and younger Kolbano sequence before deposition. These basins record rapid surface uplift to upper bathyal depths from 3.5-3 Ma with continual uplift to

  2. Structure and Stratigraphy of the Rift Basins in the Northern Gulf of California: Results from Analysis of Seismic Reflection and Borehole Data.

    Science.gov (United States)

    Martín, A.; González, M.; Helenes, J.; García, J.; Aragón, M.; Carreño, A.

    2008-12-01

    the south the Consag and Wagner faults connect with a diffuse zone of deformation defined by a series of NE trending faults with moderate normal displacement in the Upper Delfin basin. These NE-trending faults intersect the northern strand of the Ballenas transform fault along the Baja California margin, whereas the eastern end of the NE-trending faults is poorly defined along the western flank of the central antiform. In summary, sequence A was likely deposited across most of the northern gulf in the late Miocene, sequence B marks the onset of two discrete transtensional basin systems controlled by both low and high-angle faults in late Miocene-Pliocene time, and sequence C marks the regional migration of plate- margin shearing to its present location in the western gulf. Thermal effects associated with abundant volcanism and sedimentation along the western margin of the gulf likely controlled the asymmetric partitioning plate margin and shearing during the most recent phase of oblique rifting.

  3. The structural geometry and development of the central Appalachian fold-and thrust belt across the Pennsylvania salient: The effects of syntectonic loading

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    Evans, Mark

    2017-04-01

    The Pennsylvania salient is a classic arcuate fold-and-thrust belt that was deformed during the Late Paleozoic Alleghenian orogeny. 38 regional cross-sections with an along-strike spacing of 5 to 10 km were constructed, and show that the structural geometry varies significantly from the 030°-striking southwestern segment to 060°-striking northeastern segment. The primary competent lithotectonic unit is the 2 to 3 km thick Cambro-Ordovician carbonate sequence which is detached along a Cambrian clastic unit. The 5 to 7 km thick preserved Upper Paleozoic sequence is less homogeneous, and locally exhibits significant internal deformation. In the southwest part of the salient, the hinterland part of the fold belt is defined by a series of imbricated Cambro-Ordovician carbonate horses with leading-edge fault-propagation style folds that have a structural amplitude of 5 to 7 km. In the central part of the fold belt, the Broadtop synclinorium exhibits little to no imbrication of the Cambro-Ordovician unit, while in the western part of the belt toward the foreland, two additional carbonate horses with leading-edge fault-propagation style folds comprise the Wills Mt. anticlinorium. In the central and eastern parts of the salient, the structural geometry toward the foreland is defined by a duplex with 4 -5 imbricate horses of Cambro-Ordovician carbonates that transitions to an antiformal stack of two to three carbonate thrust sheets comprising the Nittany anticlinorium. Toward the hinterland, the Cambro-Ordovician carbonate sequence is faulted into broadly-spaced fault-related folds, and includes the regionally continuous (>160 km) Jacks Mt. - Berwick anticline that spans both limbs of the salient. Upon retrodeformation of the cross sections, the 060°-striking northeastern segment restoration path curves 25°-30° to the east, while the 030°-striking southwestern segment curves 20°-25° to the south. The major fault underlying the presently curved Jacks Mt. - Berwick

  4. Geophysical modeling of the northern Appalachian Brompton-Cameron, Central Maine, and Avalon terranes under the New Jersey Coastal Plain

    Science.gov (United States)

    Maguire, T.J.; Sheridan, R.E.; Volkert, R.A.

    2004-01-01

    A regional terrane map of the New Jersey Coastal Plain basement was constructed using seismic, drilling, gravity and magnetic data. The Brompton-Cameron and Central Maine terranes were coalesced as one volcanic island arc terrane before obducting onto Laurentian, Grenville age, continental crust in the Taconian orogeny [Rankin, D.W., 1994. Continental margin of the eastern United States: past and present. In: Speed, R.C., (Ed.), Phanerozoic Evolution of North American Continent-Ocean Transitions. DNAG Continent-Ocean Transect Volume. Geological Society of America, Boulder, Colorado, pp. 129-218]. Volcanic island-arc rocks of the Avalon terrane are in contact with Central Maine terrane rocks in southern Connecticut where the latter are overthrust onto the Brompton-Cameron terrane, which is thrust over Laurentian basement. Similarities of these allochthonous island arc terranes (Brompton-Cameron, Central Maine, Avalon) in lithology, fauna and age suggest that they are faulted segments of the margin of one major late Precambrian to early Paleozoic, high latitude peri-Gondwana island arc designated as "Avalonia", which collided with Laurentia in the early to middle Paleozoic. The Brompton Cameron, Central Maine, and Avalon terranes are projected as the basement under the eastern New Jersey Coastal Plain based on drill core samples of metamorphic rocks of active margin/magmatic arc origin. A seismic reflection profile across the New York Bight traces the gentle dipping (approximately 20 degrees) Cameron's Line Taconian suture southeast beneath allochthonous Avalon and other terranes to a 4 sec TWTT depth (approximately 9 km) where the Avalonian rocks are over Laurentian crust. Gentle up-plunge (approximately 5 degrees) projections to the southwest bring the Laurentian Grenville age basement and the drift-stage early Paleozoic cover rocks to windows in Burlington Co. at approximately 1 km depth and Cape May Co. at approximately 2 km depths. The antiformal Shellburne

  5. Fault segmentation and fluid flow in the Geneva Basin (France & Switzerland)

    Science.gov (United States)

    Cardello, Giovanni Luca; Lupi, Matteo; Makhloufi, Yasin; Do Couto, Damien; Clerc, Nicolas; Sartori, Mario; Samankassou, Elias; Moscariello, Andrea; Gorin, Georges; Meyer, Michel

    2017-04-01

    The Geneva Basin (GB) is an Oligo-Miocene siliciclastic basin tightened between the Alps and the southern Jura fold-and-thrust belt, whose carbonate reservoir is crossed by faults of uncertain continuity. In the frame of the geothermal exploration of the GB, the associated side risks, i.e., maximum expected earthquake magnitude, and the best suitable geothermal structures need to be determined. The outcropping relieves represent good field analogues of buried structures identified after seismo-stratigraphic analysis. In this frame, we review the regional tectonics to define the i) present-day setting, ii) fault properties and; iii) preferential paths for fluid flow. Field and geophysical data confirmed that during the late Oligocene-early Miocene the Molasse siliciclastic deposits progressively sealed the growing anticlines consisting of Mesozoic carbonates. Those are shaped by a series of fore- and back-thrusts, which we have identified also within the Molasse. As shortening is accommodated by bed-to-bed flexural-slip within shale-rich interlayers, usually having scarce hydraulic inter-connectivity, syn-kinematic mineralization massively concentrates instead within two strike-slip sets. The "wet" faults can be distinguished on the base of: orientation, amount of displacement and fabric. The first set (1) is constituted by left-lateral NNW-striking faults. The most remarkable of those, the Vuache Fault, is about 20 km long, determining a pop-up structure plunging to the SE. Minor structures, up to 5 km long, are the tear-faults dissecting the Salève antiform. In places, those are associated with brittle-ductile transition textures and crack-and-seal mineralization. Set (1) later evolved into discrete and still segmented faulting as it is traced by earthquakes nucleated at less than 5 km of depth (ML 5.3, Epagny 1996). The second set (2) is constituted by W/NW-striking right-lateral faults, up to 10 km long, associated in places with thick polyphase breccia

  6. Integrated geophysical and geological modelling: insights in the 3D structure and kinematics of the Hercynian Suture Zone in the Champtoceaux area (Brittany, France)

    Science.gov (United States)

    Martelet, G.; Calcagno, Ph.; Gumiaux, C.; Truffert, C.; Bitri, A.; Gapais, D.; Brun, J. P.

    2003-04-01

    Using the Editeur Géologique, a software specifically developed for the purpose of 3D geological modelling by the French Geological Survey (BRGM), we model a segment of the Hercynian suture zone of western Europe, in Champtoceaux area (Brittany, western France). The area shows exposures of strongly deformed eclogite-bearing gneisses and micaschists. These units were stacked during collision and exhumed during late Devonian to early Carboniferous times. Regional-scale dextral simple shear accompanied strike-slip movements along the SASZ (South Armorican Shear Zone). It produced a km-scale antiformal structure in the Champtoceaux metamorphic units with a steeply-dipping axial plane and a steeply eastward-plunging axis. Interpretation of the recent Armor2 seismic profile shows that the well-recognized north-dipping early lithological structuration is cross-cut by Carboniferous south-dipping inverse tectonics of crustal extension. In order to precise and extend in 3D the structures interpreted in the seismic profile, we model seven radial gravity profiles throughout Champtoceaux periclinal termination, based on data from the French gravity database. Direct 2D modelling is performed at a crustal scale, based on seismic constraints and geological field observations, as well as density measurements on samples or in drill holes. Input in the Editeur Géologique, the consistency of cross-sections, digitized geological map and structural information (foliation dips) is first checked. From the surface to the Moho, available spatialised 2D information is then interpolated in the whole 3D space using adapted geostatistical analysis. Finally, taking into account densities associated to each modelled geological body, the computation of the 3D gravity effect of the model is compared to the measured Bouguer anomaly, which insures that all complex 3D gravity effects are well taken into account. Results emphasise the usefulness of integrated geological and geophysical 3D modelling

  7. Influencia de la dieta y los estilos de vida en el cáncer colorrectal Influence of diet and lifestyle in colorectal cancer

    Directory of Open Access Journals (Sweden)

    J. Solera Albero

    2007-04-01

    Full Text Available Objetivo: conocer el patrón de consumo alimentario y de estilo de vida de la población de estudio y evaluar la relación de los componentes de este patrón con el CCR. Material y método: se trata de un estudio observacional, descriptivo y analítico, de sección transversal. Utilizando los archivos de los Servicios de Cirugía y Anatomía Patológica del Complejo Hospitalario Universitario de Albacete y del Hospital Comarcal de Hellín, así como de las clínicas privadas de nuestra provincia (Recoletas, Sanatorios del Rosario y de Santa Cristina y el Registro de Cáncer de la Delegación Provincial de Sanidad de Albacete, se determinó la incidencia y prevalencia del CCR en la provincia de Albacete durante los años 1992 a 1999 y posteriormente se fueron describiendo estas en las 33 zonas de salud que conforman la provincia. Se seleccionaron las tres zonas básicas de salud con más alta incidencia de CCR y las tres con más baja incidencia del CCR de la provincia de Albacete, así como los 25 censos de las poblaciones que pertenecían a estas dos zonas de alta y baja incidencia. Mediante muestreo aleatorio sistemático entre la población de 50 años o más 445 personas fueron seleccionadas para ser incluidas en el estudio. Posteriormente se realiza la encuesta en las dos zonas: alta y baja incidencia. Se recogen los datos en una base de datos estadística Dbase IV y se analizan con se paquete SPSS .10.1 Resultados: durante el periodo de estudio han aparecido en nuestra área 531 casos de CCR, de los que 291 (54,99% eran hombres, con una tasa media de 15,9 por 100.000 hab./año. Los resultados seleccionaron como zonas de mayor incidencia a Elche de la Sierra con una tasa de 30,2 por 100.000 hab./año, seguida de Alcadozo con 28,3 por 100.000 hab./año y Ontur con 26,9 por 100.000 hab./año. Mientras que las zonas de menor incidencia son Ossa de Montiel con un 5,9 y en Munera con 5,1 por 100.000 hab./año. Balazote con 6,5 por 100.000 hab

  8. Effects of different soil types in natural Mediterranean areas on soil organic carbon (SOC)

    Science.gov (United States)

    Requejo Silva, Ana; Lozano García, Beatriz; Parras Alcántara, Luis

    2017-04-01

    Effects of different soil types in natural Mediterranean areas on soil organic carbon (SOC) Ana Requejo1, Beatriz Lozano-García1, Luis Parras Alcántara1 1 Department of Agricultural Chemistry and Soil Science, Faculty of Science, Agrifood Campus of International Excellence - ceiA3, University of Córdoba, Spain. The carbon content of the atmosphere can be influenced by soils, since they can store carbon or emit large quantities of CO2. C sequestration into soils is one of the most important ecosystems services because of its role in climate regulation (IPPC, 2007). Thereof, agriculture and forestry are the only activities that can contribute to C sequestration through photosynthesis and its carbon incorporation into carbohydrates (Parras Alcántara et al., 2013). Dehesa is a multifunctional agro-sylvo-pastoral system and typical landscape of southern and central Spain and southern Portugal. It is an anthropogenic system dedicated to the combined production of black iberian pigs, a variety of foods, fuel, coal, and cork. Besides, it acts as well in the production of endangered species as wildlife habitat and as sustainable hunting areas. These dehesa areas are defined by a relationship between productivity and conservation of forest oaks, providing environmental benefits such as carbon capture and storage. The area focused in this study is the Cardeña-Montoro Nature Reserve, located within the Sierra Morena (Córdoba, South Spain). The most representative soils in Cardeña-Montoro Nature Reserve are Cambisols, Regosols, Leptosols and Fluvisols according to IUSS Working Group WRB (2006). They are characterized by a low fertility, poor physical conditions and marginal capacity for agricultural use, along with low organic matter content due to climate conditions (semiarid Mediterranean climate) and soil texture (sandy). Several studies have shown that land use affects the SOC concentration (Lozano-García et al., 2016; Khaledian et al., 2016). Based on this

  9. Modelling global change impacts on soil carbon contents of agro-silvo-pastoral Mediterranean systems

    Science.gov (United States)

    Lozano-García, Beatriz; Muñoz-Rojas, Miriam; Parras-Alcántara, Luis

    2016-04-01

    To assess the impact of climate change on soil organic C (SOC) stocks in agro-silvo-pastoral environments, different models have been applied worldwide at local or regional scales, such as as RothC (Francaviglia et al., 2012) or CENTURY (Alvaro-Fuentes et al., 2012). However, some of these models may require a high number of input parameters or can underestimate the effect of soil depth. CarboSOIL (Muñoz-Rojas et al., 2013) is an empirical model based on regression techniques and developed to predict SOC contents at standard soil depths (0-25, 25-50 and 50-75 cm) under a range of climate and/or land use change scenarios. CarboSOIL has been successfully applied in different Mediterranean areas ,e.g. Southern Spain (Muñoz-Rojas et al., 2013; Abd-Elmabod et al., 2014), Northern Egypt (Muñoz-Rojas et al., 2014) and Italy (Muñoz-Rojas et al., 2015). In this study, CarboSOIL was applied in the Cardeña and Montoro mountain range Natural Park. This area covers 385 km2 and is located within Sierra Morena (Córdoba, South Spain) and has a semiarid Mediterranean climate. It is characterized by agro-silvo-pastoral systems. The Mediterranean evergreen oak woodland (MEOW-dehesa) is savanna-like open woodland ecosystem characterized by silvopastoral uses, being an ancient human modified Mediterranean landscape (Corral-Fernández et al., 2013; Lozano-García and Parras-Alcántara 2013). The most representative soils in the Cardeña and Montoro mountain range Natural Park are Cambisols, Regosols, Leptosols and Fluvisols. These soils are characterized by low fertility, poor physical conditions and marginal capacity for agricultural use, together with low organic matter (OM) content due to climate conditions (semiarid Mediterranean climate) and soil texture (sandy). The model was applied at different soil depths: 0-25, 25-50 and 50-75 cm (Parras-Alcántara et al., 2015) considering land use and climate changes scenarios based on available global climate models (IPPC, 2007). A

  10. Editorial

    Directory of Open Access Journals (Sweden)

    Adilson Luiz Pinto

    2015-11-01

    Full Text Available http://dx.doi.org/10.5007/1518-2924.2015v20n44p1 Prezados leitores. Com muita satisfação publicamos o último número de 2015 (v. 20, n. 44 da Encontros Bibli: Revista Eletrônica de Biblioteconomia e Ciência da Informação. Para esta edição trazemos na portada uma fotografia da vista do Monte Aconcágua, ponto mais alto da América e de todo Hemisfério Sul. A referida fotografia foi tirada dois dias antes do terremoto do Chile, que foi sentido com muita força em vários países da América do Sul. Nossa dedicatória singela e votos para uma pronta reconstrução chilena. Na parte científica da revista, temos o prazer de contar com oito artigos científicos, voltados as diversas temáticas e contextualizações contemporâneas da Ciência da Informação nacional. - O primeiro artigo, de autoria de Elisângela Cristina Aganette e Maurício Barcellos Almeida, trata da Teoria da Terminologia e da Teoria da Ontologia Aplicada, utilizadas para representar sistemas de organização do conhecimento, com um enfoque de descrever e comparar os diferentes dialetos adotados pelas duas teorias. - Para o segundo artigo, de Ariadne Chloe Mary Furnival, Bianca Miranda de Almeida e Marco Donizete Paulino da Silva questiona os Direitos Autorais, a autorização de reuso e o arquivamento de conteúdos em repositórios de Acesso Aberto nas revistas brasileiras de biológicas e de saúde disponibilizadas na plataforma SciELO. - O terceiro artigo, das autoras Cecília Morena Maria da Silva, Ana Carolina Cintra Faria e Sofia Galvão Baptista, trata da identificação do perfil e das competências profissionais necessárias ao bibliotecário que atua na área de educação profissional e tecnológica, sob a perspectiva do próprio profissional. - No quarto artigo, de Daniela do Nascimento Silva, Analisou os (i Recursos Educacionais Abertos - REA como (ii fontes de informação, no qual buscou aspectos conceituais visando traçar um paralelo relacional entre

  11. Evaluating the controls on Tourmaline Crystallization in the mylonitic granite-gneiss pluton in the Northeastern of Jan mine (Lorestan province

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    Arezoo Moradi

    2017-02-01

    tourmaline and associated minerals, chemistry of tourmaline – bearing granitoid pluton, and location of petrological of tourmaline minerals can be sought. Acknowledgements The authors would like to thank the Shahrekord University for providing the budget for this research. References Copjakova, R., Skoda, R., Galiova, M.V. and Novak, M., 2013. Distributions of Y + REE and Sc in tourmaline and their implications for the melt evolution; examples from NYF pegmatites of the Trebic Pluton, Moldanubian Zone, Czech Republic. Journal of Geosciences, 58(2: 113–131. Cuney, M. and Friedrich, M., 1987. Physicochemical and crystalchemical controls on accessory mineral paragenesis in granitoids: implications for uranium metallogenesis. Bulletin Mineralogie, 110(2-3: 235–247. Jolliff, B.L., Papike, J.J. and Laul, J.C., 1987. Mineral recorders of pegmatite internal evolution: REE contents of tourmaline from the Bob Ingersoll pegmatite, South Dakota. Geochimica et Cosmochimica Acta, 51(8: 2225–2232. Kontak, D.J., Dostal, J., Kyser, K. and Archibald, D.A., 2002. A petrological, geochemical, isotopic and fluidinclusion study of 370 Ma pegmatite–aplite sheets, Peggys Cove, Nova Scotia, Canada. The Canadian Mineralogist, 40(5: 1249–1286. Moradi, A., Shabanian Boroujeni, N. and Davodian Dehkordi, A.R., 2015. Geochemistry and determination genesis of tourmalines in the mylonitic granite-gneiss pluton in Northeastern of Jan mine (Lorestan province(. Journal of Petrology, 23(6: 65-82. (in Persian with English abstract Moradi, A., Shabanian Boroujeni, N. and Davodian Dehkordi, A.R., 2017. Geochemistry of granitoid pluton in northeastern of mine Jan (province Lorestan. Journal of Economic Geology (in Persian with English abstract. (in print Pesquera, A., Torres-Ruiz, J., Gil-Crespo, P.P. and Jiang, S. Y., 2005. Petrographic, chemical and B-isotopic insights into the origin of tourmaline-rich rocks and boron recycling in the Martinamor antiform (Central Iberian Zone, Salamanca, Spain