Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida)
Special isssue Dorsales Oceánicas - Oceanic Ridges.-- 22 pages, 11 figures [EN] In February 1992, a geological and geophysical survey was carried out in the NW Antarctic Peninsula region, between South Shetland, Elephant and Orkney Islands (Antarctica), during the "Scotia 92" cruise aboard...
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CSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA)
1994
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ftcsic:oai:digital.csic.es:10261/269147 2024-02-11T09:57:10+01:00 Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida) Canals, Miquel Acosta, Juan Gràcia, Eulàlia Escartín, J. Grupo O.R.C.A. 1994-07 http://hdl.handle.net/10261/269147 es spa CSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA) https://revistes.ub.edu/index.php/ActaGeologica/article/view/4525/5740 No Acta Geologica Hispanica 27(3-4): 89-110 (1994) 0567-7505 http://hdl.handle.net/10261/269147 2173-6537 open artículo http://purl.org/coar/resource_type/c_6501 1994 ftcsic 2024-01-16T11:24:11Z Special isssue Dorsales Oceánicas - Oceanic Ridges.-- 22 pages, 11 figures [EN] In February 1992, a geological and geophysical survey was carried out in the NW Antarctic Peninsula region, between South Shetland, Elephant and Orkney Islands (Antarctica), during the "Scotia 92" cruise aboard BIO Hespérides. The multi-channel seismics, magnetics and gravity data show the different sedimentary characteristics between Scotia and Powell Basins. At the western end of the South Scotia Ridge (SSR), an area (50 x 100 km) covered by multibearn bathymetry reveals a maximum depth of more than 5,300 m corresponding to what we refer to as the Hespérides Deep. The SSR is a sinistral transform plate boundary between the Scotia and Antarctic plates (on the north and south respectively). The morphology of the SSR is constituted by two ridges separated by a deep and narrow valiey (10 to 30 km wide). Two main families of faults can be distinguished, one trending E-W and parallel to the plate boundary, and another one trending NW-SE. We iriterpret that the former accommodates the regional strike-slip motion, whereas the later has an extensional component which may be related to the main trend of Bransfield Basin. The rhomboid-shape of the Deep is the result of the interplay between both sets of faults. Assuming that the transform boundary runs between the two ridges we consider that the Hesperides Deep is a smaU puli-apart basin developed by the sinistral strike-slip motion along the SSR [ES] La Dorsal Sur de Scotia (DSS) constituye une frontera de placas transformante con sentido senestral, que limita las placas de Scotia, al norte, y Antártica, al sur. Durante la campaña de geología y geofísica marinas "Scotia 92", realizada en Febrero de 1992 a bordo del BIO Hespérides, se ha estudiado su extremo occidental y sectores próximos a la Cuenca de Bransfield, entre el margen nor-occidental de la Península Antártica y las islas Shetland del Sur, Elefante y Orcadas del Sur. Al norte y sur de la DSS se desarrollan las cuencas de Scotia ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Antártica Antártida Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Elefante ENVELOPE(-55.167,-55.167,-61.167,-61.167) Hesperides Deep ENVELOPE(-50.833,-50.833,-60.350,-60.350) islas Shetland del Sur ENVELOPE(-58.000,-58.000,-62.000,-62.000) Orcadas ENVELOPE(-44.717,-44.717,-60.750,-60.750) Orcadas del Sur ENVELOPE(-45.500,-45.500,-60.583,-60.583) Shetland del Sur ENVELOPE(-58.000,-58.000,-62.000,-62.000) South Scotia Ridge ENVELOPE(-46.500,-46.500,-60.000,-60.000) |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
Spanish |
description |
Special isssue Dorsales Oceánicas - Oceanic Ridges.-- 22 pages, 11 figures [EN] In February 1992, a geological and geophysical survey was carried out in the NW Antarctic Peninsula region, between South Shetland, Elephant and Orkney Islands (Antarctica), during the "Scotia 92" cruise aboard BIO Hespérides. The multi-channel seismics, magnetics and gravity data show the different sedimentary characteristics between Scotia and Powell Basins. At the western end of the South Scotia Ridge (SSR), an area (50 x 100 km) covered by multibearn bathymetry reveals a maximum depth of more than 5,300 m corresponding to what we refer to as the Hespérides Deep. The SSR is a sinistral transform plate boundary between the Scotia and Antarctic plates (on the north and south respectively). The morphology of the SSR is constituted by two ridges separated by a deep and narrow valiey (10 to 30 km wide). Two main families of faults can be distinguished, one trending E-W and parallel to the plate boundary, and another one trending NW-SE. We iriterpret that the former accommodates the regional strike-slip motion, whereas the later has an extensional component which may be related to the main trend of Bransfield Basin. The rhomboid-shape of the Deep is the result of the interplay between both sets of faults. Assuming that the transform boundary runs between the two ridges we consider that the Hesperides Deep is a smaU puli-apart basin developed by the sinistral strike-slip motion along the SSR [ES] La Dorsal Sur de Scotia (DSS) constituye une frontera de placas transformante con sentido senestral, que limita las placas de Scotia, al norte, y Antártica, al sur. Durante la campaña de geología y geofísica marinas "Scotia 92", realizada en Febrero de 1992 a bordo del BIO Hespérides, se ha estudiado su extremo occidental y sectores próximos a la Cuenca de Bransfield, entre el margen nor-occidental de la Península Antártica y las islas Shetland del Sur, Elefante y Orcadas del Sur. Al norte y sur de la DSS se desarrollan las cuencas de Scotia ... |
format |
Article in Journal/Newspaper |
author |
Canals, Miquel Acosta, Juan Gràcia, Eulàlia Escartín, J. Grupo O.R.C.A. |
spellingShingle |
Canals, Miquel Acosta, Juan Gràcia, Eulàlia Escartín, J. Grupo O.R.C.A. Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida) |
author_facet |
Canals, Miquel Acosta, Juan Gràcia, Eulàlia Escartín, J. Grupo O.R.C.A. |
author_sort |
Canals, Miquel |
title |
Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida) |
title_short |
Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida) |
title_full |
Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida) |
title_fullStr |
Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida) |
title_full_unstemmed |
Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida) |
title_sort |
caracterización geológica de la región de enlace entre la cuenca de bransfield y la dorsal sur de scotia (antártida) |
publisher |
CSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA) |
publishDate |
1994 |
url |
http://hdl.handle.net/10261/269147 |
long_lat |
ENVELOPE(-55.167,-55.167,-61.167,-61.167) ENVELOPE(-50.833,-50.833,-60.350,-60.350) ENVELOPE(-58.000,-58.000,-62.000,-62.000) ENVELOPE(-44.717,-44.717,-60.750,-60.750) ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-58.000,-58.000,-62.000,-62.000) ENVELOPE(-46.500,-46.500,-60.000,-60.000) |
geographic |
Antarctic Antarctic Peninsula Elefante Hesperides Deep islas Shetland del Sur Orcadas Orcadas del Sur Shetland del Sur South Scotia Ridge |
geographic_facet |
Antarctic Antarctic Peninsula Elefante Hesperides Deep islas Shetland del Sur Orcadas Orcadas del Sur Shetland del Sur South Scotia Ridge |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Antártica Antártida |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Antártica Antártida |
op_relation |
https://revistes.ub.edu/index.php/ActaGeologica/article/view/4525/5740 No Acta Geologica Hispanica 27(3-4): 89-110 (1994) 0567-7505 http://hdl.handle.net/10261/269147 2173-6537 |
op_rights |
open |
_version_ |
1790609126268600320 |