Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida)
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...
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Universitat de Barcelona
1992
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ftubarceojs:oai:revistes.ub.edu:article/4525 2023-05-15T13:32:26+02:00 Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida) CANALS, M. ACOSTA, J. GRÀCIA, E. ESCARTÍN, J. O.R.C.A., GRUPO 1992-01-12 text/html application/pdf http://revistes.ub.edu/index.php/ActaGeologica/article/view/4525 eng eng Universitat de Barcelona http://revistes.ub.edu/index.php/ActaGeologica/article/view/4525/5739 http://revistes.ub.edu/index.php/ActaGeologica/article/view/4525/5740 http://revistes.ub.edu/index.php/ActaGeologica/article/view/4525 Acta Geologica Hispanica; Vol.: 27 Núm.: 3 -4; 89-110 2173-6537 0567-7505 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1992 ftubarceojs 2022-12-26T13:39:25Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Antártida Revistes Científiques de la Universitat de Barcelona Antarctic Antarctic Peninsula Hesperides Deep ENVELOPE(-50.833,-50.833,-60.350,-60.350) South Scotia Ridge ENVELOPE(-46.500,-46.500,-60.000,-60.000) |
institution |
Open Polar |
collection |
Revistes Científiques de la Universitat de Barcelona |
op_collection_id |
ftubarceojs |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
CANALS, M. ACOSTA, J. GRÀCIA, E. ESCARTÍN, J. O.R.C.A., GRUPO |
spellingShingle |
CANALS, M. ACOSTA, J. GRÀCIA, E. ESCARTÍN, J. O.R.C.A., GRUPO Caracterización geológica de la región de enlace entre la Cuenca de Bransfield y la Dorsal Sur de Scotia (Antártida) |
author_facet |
CANALS, M. ACOSTA, J. GRÀCIA, E. ESCARTÍN, J. O.R.C.A., GRUPO |
author_sort |
CANALS, M. |
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 |
Universitat de Barcelona |
publishDate |
1992 |
url |
http://revistes.ub.edu/index.php/ActaGeologica/article/view/4525 |
long_lat |
ENVELOPE(-50.833,-50.833,-60.350,-60.350) ENVELOPE(-46.500,-46.500,-60.000,-60.000) |
geographic |
Antarctic Antarctic Peninsula Hesperides Deep South Scotia Ridge |
geographic_facet |
Antarctic Antarctic Peninsula Hesperides Deep South Scotia Ridge |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Antártida |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Antártida |
op_source |
Acta Geologica Hispanica; Vol.: 27 Núm.: 3 -4; 89-110 2173-6537 0567-7505 |
op_relation |
http://revistes.ub.edu/index.php/ActaGeologica/article/view/4525/5739 http://revistes.ub.edu/index.php/ActaGeologica/article/view/4525/5740 http://revistes.ub.edu/index.php/ActaGeologica/article/view/4525 |
_version_ |
1766026980209197056 |