Morphoestructure and evolution of the central and Eastern Bransfield Basins (NW Antartic Peninsula).
The Bransfield Basin is a narrow and elongated active rift basin located between the Antarctic Peninsula and the South Shetland Islands. The Bransfield Basin is composed of three small basins, and two of them, the Central and Eastern Bransfield Basins, were surveyed during a recent cruise (GEBRA 93)...
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1996
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ftieo:oai:repositorio.ieo.es:10508/6818 2023-05-15T14:00:17+02:00 Morphoestructure and evolution of the central and Eastern Bransfield Basins (NW Antartic Peninsula). Gràcia, Eulàlia Canals i Artigas, M. (Miquel) Farrán, M. (Marcel.li) Prieto, M.J. Sorribas, J. Acosta-Yepes, J. (Juan) Gebra Team Antarctic Ocean Antarctic Atlantic Scotia Sea 1996 http://hdl.handle.net/10508/6818 https://doi.org/10.1007/BF00286088 unknown Sede Central IEO https://link.springer.com/article/10.1007/BF00286088 0025-3235 http://hdl.handle.net/10508/6818 Marine Geophysical Researches, V-18. 1996: 4229-4248 1573-0581 https://doi.org/10.1007/BF00286088 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ open access CC-BY-NC-ND research article 1996 ftieo https://doi.org/10.1007/BF00286088 2023-02-15T01:23:33Z The Bransfield Basin is a narrow and elongated active rift basin located between the Antarctic Peninsula and the South Shetland Islands. The Bransfield Basin is composed of three small basins, and two of them, the Central and Eastern Bransfield Basins, were surveyed during a recent cruise (GEBRA 93). The full swath bathymetry coverage as well as the single-channel seismic reflection and magnetic profiles that have been acquired, help us to better understand the morphostructure and recent evolution of the Bransfield Basin. Six large volcanic edifices aligned with the basin axis stick out of the sedimented seafloor of the Central Bransfield Basin. In contrast, the Eastern Bransfield Basin is characterised by four deep troughs displaying a rhombic-shape, and small, scattered volcanic cones located in the southwestern half basin. Seamount volcanism plays an important role in the formation of new crust in the Bransfield Basin. The larger seamounts of the Central Bransfield Basin are located at the intersection of the two main orthogonal sets of faults (longitudinal ENE-WSW and transversal NNW-SSE). Morphological analysis of the seamounts indicates a multi-staged volcano-tectonic construction. The distribution and shape of these edifices suggests that both volcanism and extension are concentrated at the same preferential areas through time. This might be related to the fracturation style of the continental crust. The Central and Eastern Bransfield Basins are very different in morphostructure, volcanism, and sedimentary cover. The Central Bransfield Basin shows evidence of NW-SE extensional faulting and focused active MORB-volcanism interpreted as result of incipient seafloor spreading. The Eastern Bransfield Basin is still in a rifting stage, mainly dominated by a NW-SE extension and some left-lateral strike-slip component probably related to the South Scotia Ridge. 1 Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Antarctic Peninsula antartic* Scotia Sea South Shetland Islands Instituto Español de Oceanografía: e-IEO Antarctic Antarctic Ocean Antarctic Peninsula Scotia Sea South Scotia Ridge ENVELOPE(-46.500,-46.500,-60.000,-60.000) South Shetland Islands The Antarctic Marine Geophysical Researches 18 2-4 429 448 |
institution |
Open Polar |
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Instituto Español de Oceanografía: e-IEO |
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ftieo |
language |
unknown |
description |
The Bransfield Basin is a narrow and elongated active rift basin located between the Antarctic Peninsula and the South Shetland Islands. The Bransfield Basin is composed of three small basins, and two of them, the Central and Eastern Bransfield Basins, were surveyed during a recent cruise (GEBRA 93). The full swath bathymetry coverage as well as the single-channel seismic reflection and magnetic profiles that have been acquired, help us to better understand the morphostructure and recent evolution of the Bransfield Basin. Six large volcanic edifices aligned with the basin axis stick out of the sedimented seafloor of the Central Bransfield Basin. In contrast, the Eastern Bransfield Basin is characterised by four deep troughs displaying a rhombic-shape, and small, scattered volcanic cones located in the southwestern half basin. Seamount volcanism plays an important role in the formation of new crust in the Bransfield Basin. The larger seamounts of the Central Bransfield Basin are located at the intersection of the two main orthogonal sets of faults (longitudinal ENE-WSW and transversal NNW-SSE). Morphological analysis of the seamounts indicates a multi-staged volcano-tectonic construction. The distribution and shape of these edifices suggests that both volcanism and extension are concentrated at the same preferential areas through time. This might be related to the fracturation style of the continental crust. The Central and Eastern Bransfield Basins are very different in morphostructure, volcanism, and sedimentary cover. The Central Bransfield Basin shows evidence of NW-SE extensional faulting and focused active MORB-volcanism interpreted as result of incipient seafloor spreading. The Eastern Bransfield Basin is still in a rifting stage, mainly dominated by a NW-SE extension and some left-lateral strike-slip component probably related to the South Scotia Ridge. 1 |
format |
Article in Journal/Newspaper |
author |
Gràcia, Eulàlia Canals i Artigas, M. (Miquel) Farrán, M. (Marcel.li) Prieto, M.J. Sorribas, J. Acosta-Yepes, J. (Juan) Gebra Team |
spellingShingle |
Gràcia, Eulàlia Canals i Artigas, M. (Miquel) Farrán, M. (Marcel.li) Prieto, M.J. Sorribas, J. Acosta-Yepes, J. (Juan) Gebra Team Morphoestructure and evolution of the central and Eastern Bransfield Basins (NW Antartic Peninsula). |
author_facet |
Gràcia, Eulàlia Canals i Artigas, M. (Miquel) Farrán, M. (Marcel.li) Prieto, M.J. Sorribas, J. Acosta-Yepes, J. (Juan) Gebra Team |
author_sort |
Gràcia, Eulàlia |
title |
Morphoestructure and evolution of the central and Eastern Bransfield Basins (NW Antartic Peninsula). |
title_short |
Morphoestructure and evolution of the central and Eastern Bransfield Basins (NW Antartic Peninsula). |
title_full |
Morphoestructure and evolution of the central and Eastern Bransfield Basins (NW Antartic Peninsula). |
title_fullStr |
Morphoestructure and evolution of the central and Eastern Bransfield Basins (NW Antartic Peninsula). |
title_full_unstemmed |
Morphoestructure and evolution of the central and Eastern Bransfield Basins (NW Antartic Peninsula). |
title_sort |
morphoestructure and evolution of the central and eastern bransfield basins (nw antartic peninsula). |
publisher |
Sede Central IEO |
publishDate |
1996 |
url |
http://hdl.handle.net/10508/6818 https://doi.org/10.1007/BF00286088 |
op_coverage |
Antarctic Ocean Antarctic Atlantic Scotia Sea |
long_lat |
ENVELOPE(-46.500,-46.500,-60.000,-60.000) |
geographic |
Antarctic Antarctic Ocean Antarctic Peninsula Scotia Sea South Scotia Ridge South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean Antarctic Peninsula Scotia Sea South Scotia Ridge South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean Antarctic Peninsula antartic* Scotia Sea South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctic Peninsula antartic* Scotia Sea South Shetland Islands |
op_relation |
https://link.springer.com/article/10.1007/BF00286088 0025-3235 http://hdl.handle.net/10508/6818 Marine Geophysical Researches, V-18. 1996: 4229-4248 1573-0581 https://doi.org/10.1007/BF00286088 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ open access |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1007/BF00286088 |
container_title |
Marine Geophysical Researches |
container_volume |
18 |
container_issue |
2-4 |
container_start_page |
429 |
op_container_end_page |
448 |
_version_ |
1766269332455686144 |