Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin
We model sediment isopach grids for the southern Pacific margin of West Antarctica on the basis of a compilation of more than 10,000 km of single-channel and multichannel seismic reflection data and correlations with ocean drilling sites. Following recent seismic stratigraphic models, we differentia...
Published in: | Geochemistry, Geophysics, Geosystems |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2006
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ftvliz:oai:oma.vliz.be:210917 2023-05-15T13:24:05+02:00 Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin Scheuer, C. Gohl, K. Eagles, G. 2006 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=210917 en eng info:eu-repo/semantics/altIdentifier/wos/000242367400002 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2006GC001315 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=210917 info:eu-repo/semantics/restrictedAccess %3Ci%3EGeochem.+Geophys.+Geosyst.+7%2811%29%3C%2Fi%3E%3A+18+PP.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1029%2F2006GC001315%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1029%2F2006GC001315%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2006 ftvliz https://doi.org/10.1029/2006GC001315 2022-05-01T09:38:11Z We model sediment isopach grids for the southern Pacific margin of West Antarctica on the basis of a compilation of more than 10,000 km of single-channel and multichannel seismic reflection data and correlations with ocean drilling sites. Following recent seismic stratigraphic models, we differentiate two main sequences, the upper of which alone is defined by seismostratigraphic indications for frequent grounded ice advances to the shelf edge off West Antarctica. The subsequent modeling of sediment thickness grids allows us to compare the pre-glacially dominated and glacially dominated sedimentary development of the study area. On the basis of available age constraints from drilling sites, we assume the onset of accumulation of sediments on the continental rise that were supplied by frequent advances of grounding ice on the continental shelf to have occurred at about 10 Ma. The thickest glacial sediment accumulations occur in front of major glacial drainage outlets, i.e., Marguerite Trough on the western Antarctic Peninsula margin, Belgica Trough in the Bellingshausen Sea, and a depression on the inner and middle shelves off Pine Island Bay in the Amundsen Sea. Glacially dominated sedimentation rates of between 140 and 170 m/m.y. are calculated for these sites. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Bellingshausen Sea Pine Island Pine Island Bay West Antarctica Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic Antarctic Peninsula West Antarctica Amundsen Sea Bellingshausen Sea Pacific Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Geochemistry, Geophysics, Geosystems 7 11 n/a n/a |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
We model sediment isopach grids for the southern Pacific margin of West Antarctica on the basis of a compilation of more than 10,000 km of single-channel and multichannel seismic reflection data and correlations with ocean drilling sites. Following recent seismic stratigraphic models, we differentiate two main sequences, the upper of which alone is defined by seismostratigraphic indications for frequent grounded ice advances to the shelf edge off West Antarctica. The subsequent modeling of sediment thickness grids allows us to compare the pre-glacially dominated and glacially dominated sedimentary development of the study area. On the basis of available age constraints from drilling sites, we assume the onset of accumulation of sediments on the continental rise that were supplied by frequent advances of grounding ice on the continental shelf to have occurred at about 10 Ma. The thickest glacial sediment accumulations occur in front of major glacial drainage outlets, i.e., Marguerite Trough on the western Antarctic Peninsula margin, Belgica Trough in the Bellingshausen Sea, and a depression on the inner and middle shelves off Pine Island Bay in the Amundsen Sea. Glacially dominated sedimentation rates of between 140 and 170 m/m.y. are calculated for these sites. |
format |
Article in Journal/Newspaper |
author |
Scheuer, C. Gohl, K. Eagles, G. |
spellingShingle |
Scheuer, C. Gohl, K. Eagles, G. Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin |
author_facet |
Scheuer, C. Gohl, K. Eagles, G. |
author_sort |
Scheuer, C. |
title |
Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin |
title_short |
Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin |
title_full |
Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin |
title_fullStr |
Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin |
title_full_unstemmed |
Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin |
title_sort |
gridded isopach maps from the south pacific and their use in interpreting the sedimentation history of the west antarctic continental margin |
publishDate |
2006 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=210917 |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Antarctic Antarctic Peninsula West Antarctica Amundsen Sea Bellingshausen Sea Pacific Marguerite Island Bay Pine Island Bay |
geographic_facet |
Antarctic Antarctic Peninsula West Antarctica Amundsen Sea Bellingshausen Sea Pacific Marguerite Island Bay Pine Island Bay |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Bellingshausen Sea Pine Island Pine Island Bay West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Bellingshausen Sea Pine Island Pine Island Bay West Antarctica |
op_source |
%3Ci%3EGeochem.+Geophys.+Geosyst.+7%2811%29%3C%2Fi%3E%3A+18+PP.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1029%2F2006GC001315%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1029%2F2006GC001315%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000242367400002 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2006GC001315 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=210917 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/2006GC001315 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
7 |
container_issue |
11 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1766377372601286656 |