Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin
Large scale maps of sediment thicknesses are essential prerequisites for the next generation of high resolution paleobathymetric reconstructions. In addition, maps of sediment thicknesses on continental margins are useful for studies of terrigenous sediment supply and sediment distribution on the oc...
Published in: | Geochemistry, Geophysics, Geosystems |
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ftawi:oai:epic.awi.de:15101 2024-09-15T17:39:08+00:00 Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin Scheuer, C. Gohl, Karsten Eagles, G. 2006 application/pdf https://epic.awi.de/id/eprint/15101/ https://epic.awi.de/id/eprint/15101/1/Sch2006ab.pdf https://doi.org/10.1029/2006GC001315 https://hdl.handle.net/10013/epic.25291 https://hdl.handle.net/10013/epic.25291.d001 unknown https://epic.awi.de/id/eprint/15101/1/Sch2006ab.pdf https://hdl.handle.net/10013/epic.25291.d001 Scheuer, C. , Gohl, K. orcid:0000-0002-9558-2116 and Eagles, G. (2006) Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin , Geochemistry geophysics geosystems, 7, Q11015 . doi:10.1029/2006GC001315 <https://doi.org/10.1029/2006GC001315> , hdl:10013/epic.25291 EPIC3Geochemistry geophysics geosystems, 7, Q11015, ISSN: 1525-2027 Article isiRev 2006 ftawi https://doi.org/10.1029/2006GC001315 2024-06-24T03:58:50Z Large scale maps of sediment thicknesses are essential prerequisites for the next generation of high resolution paleobathymetric reconstructions. In addition, maps of sediment thicknesses on continental margins are useful for studies of terrigenous sediment supply and sediment distribution on the ocean floor. Based on a compilation of more than 10000 km of single and multichannel seismic reflection data and correlations with ocean drilling sites, we model isopach grids of the Southern Pacific margin of West Antarctica. Following recent seismic stratigraphic models, we differentiate between "pre-glacial" and "glacially transported" sediments. The subsequent modelling of sediment thickness grids allows us to compare the pre-glacial and glacial sedimentary development in the study area. Based on available drillhole dates, we estimate the onset of accumulation of glacially transported sediments to have occurred at about 10 Ma, based on approximate sediment deposition rates. 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 the trough off Pine Island Bay in the Amundsen Sea. Sedimentation rates 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Geochemistry, Geophysics, Geosystems 7 11 n/a n/a |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Large scale maps of sediment thicknesses are essential prerequisites for the next generation of high resolution paleobathymetric reconstructions. In addition, maps of sediment thicknesses on continental margins are useful for studies of terrigenous sediment supply and sediment distribution on the ocean floor. Based on a compilation of more than 10000 km of single and multichannel seismic reflection data and correlations with ocean drilling sites, we model isopach grids of the Southern Pacific margin of West Antarctica. Following recent seismic stratigraphic models, we differentiate between "pre-glacial" and "glacially transported" sediments. The subsequent modelling of sediment thickness grids allows us to compare the pre-glacial and glacial sedimentary development in the study area. Based on available drillhole dates, we estimate the onset of accumulation of glacially transported sediments to have occurred at about 10 Ma, based on approximate sediment deposition rates. 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 the trough off Pine Island Bay in the Amundsen Sea. Sedimentation rates between 140 and 170 m/m.y. are calculated for these sites. |
format |
Article in Journal/Newspaper |
author |
Scheuer, C. Gohl, Karsten Eagles, G. |
spellingShingle |
Scheuer, C. Gohl, Karsten 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, Karsten 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 |
https://epic.awi.de/id/eprint/15101/ https://epic.awi.de/id/eprint/15101/1/Sch2006ab.pdf https://doi.org/10.1029/2006GC001315 https://hdl.handle.net/10013/epic.25291 https://hdl.handle.net/10013/epic.25291.d001 |
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 |
EPIC3Geochemistry geophysics geosystems, 7, Q11015, ISSN: 1525-2027 |
op_relation |
https://epic.awi.de/id/eprint/15101/1/Sch2006ab.pdf https://hdl.handle.net/10013/epic.25291.d001 Scheuer, C. , Gohl, K. orcid:0000-0002-9558-2116 and Eagles, G. (2006) Gridded isopach maps from the South Pacific and their use in interpreting the sedimentation history of the West Antarctic continental margin , Geochemistry geophysics geosystems, 7, Q11015 . doi:10.1029/2006GC001315 <https://doi.org/10.1029/2006GC001315> , hdl:10013/epic.25291 |
op_doi |
https://doi.org/10.1029/2006GC001315 |
container_title |
Geochemistry, Geophysics, Geosystems |
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7 |
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11 |
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1810477755617247232 |