Pre-glacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica, NetCDF files
Circum-Antarctic sediment thickness grids provide constraints for basin evolution and paleotopographic reconstructions, which are important for paleo-ice sheet formation histories. By compiling old and new seismic data, we identify sequences representing pre-glacial, transitional and full glacial de...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.864906 2023-05-15T13:24:07+02:00 Pre-glacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica, NetCDF files Lindeque, Ansa Gohl, Karsten Wobbe, Florian Uenzelmann-Neben, Gabriele 2016-09-23 text/tab-separated-values, 20 data points https://doi.pangaea.de/10.1594/PANGAEA.864906 https://doi.org/10.1594/PANGAEA.864906 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.864906 https://doi.org/10.1594/PANGAEA.864906 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Lindeque, Ansa; Gohl, Karsten; Wobbe, Florian; Uenzelmann-Neben, Gabriele (2016): Preglacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica. Geochemistry, Geophysics, Geosystems, 17(10), 4276-4285, https://doi.org/10.1002/2016GC006401 File content File format File name File size Uniform resource locator/link to file Dataset 2016 ftpangaea https://doi.org/10.1594/PANGAEA.864906 https://doi.org/10.1002/2016GC006401 2023-01-20T09:07:49Z Circum-Antarctic sediment thickness grids provide constraints for basin evolution and paleotopographic reconstructions, which are important for paleo-ice sheet formation histories. By compiling old and new seismic data, we identify sequences representing pre-glacial, transitional and full glacial deposition processes along the Pacific margin of West Antarctica. The pre-glacial sediment grid depicts 1.3 to 4.0 km thick depocenters, relatively evenly distributed along the margin. The depocenters change markedly in the transitional phase at, or after, the Eocene/Oligocene boundary, when the first major ice sheets reached the shelf. Full glacial sequences, starting in the middle Miocene, indicate new depocenter formation North of the Amundsen Sea Embayment and localized eastward shifts in the Bellingshausen Sea and Antarctic Peninsula basins. Using present-day drainage paths and source areas on the continent, our calculations indicate an estimated observed total sedimentary volume of ~10 x 10**6 km**3 was eroded from West Antarctica since the separation of New Zealand in the Late Cretaceous. Of this 4.9 x 10**6 km**3 predates the onset of glaciation and need to be considered for a paleotopography reconstruction of 34 Ma. Whereas 5.1 x 10**6 km**3 postdate the onset of glaciation, of which 2.5 x 10**6 km**3 were deposited in post mid-Miocene full glacial conditions. Dataset Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Bellingshausen Sea Ice Sheet West Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Antarctic Peninsula West Antarctica Amundsen Sea Bellingshausen Sea Pacific New Zealand |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
File content File format File name File size Uniform resource locator/link to file |
spellingShingle |
File content File format File name File size Uniform resource locator/link to file Lindeque, Ansa Gohl, Karsten Wobbe, Florian Uenzelmann-Neben, Gabriele Pre-glacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica, NetCDF files |
topic_facet |
File content File format File name File size Uniform resource locator/link to file |
description |
Circum-Antarctic sediment thickness grids provide constraints for basin evolution and paleotopographic reconstructions, which are important for paleo-ice sheet formation histories. By compiling old and new seismic data, we identify sequences representing pre-glacial, transitional and full glacial deposition processes along the Pacific margin of West Antarctica. The pre-glacial sediment grid depicts 1.3 to 4.0 km thick depocenters, relatively evenly distributed along the margin. The depocenters change markedly in the transitional phase at, or after, the Eocene/Oligocene boundary, when the first major ice sheets reached the shelf. Full glacial sequences, starting in the middle Miocene, indicate new depocenter formation North of the Amundsen Sea Embayment and localized eastward shifts in the Bellingshausen Sea and Antarctic Peninsula basins. Using present-day drainage paths and source areas on the continent, our calculations indicate an estimated observed total sedimentary volume of ~10 x 10**6 km**3 was eroded from West Antarctica since the separation of New Zealand in the Late Cretaceous. Of this 4.9 x 10**6 km**3 predates the onset of glaciation and need to be considered for a paleotopography reconstruction of 34 Ma. Whereas 5.1 x 10**6 km**3 postdate the onset of glaciation, of which 2.5 x 10**6 km**3 were deposited in post mid-Miocene full glacial conditions. |
format |
Dataset |
author |
Lindeque, Ansa Gohl, Karsten Wobbe, Florian Uenzelmann-Neben, Gabriele |
author_facet |
Lindeque, Ansa Gohl, Karsten Wobbe, Florian Uenzelmann-Neben, Gabriele |
author_sort |
Lindeque, Ansa |
title |
Pre-glacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica, NetCDF files |
title_short |
Pre-glacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica, NetCDF files |
title_full |
Pre-glacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica, NetCDF files |
title_fullStr |
Pre-glacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica, NetCDF files |
title_full_unstemmed |
Pre-glacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica, NetCDF files |
title_sort |
pre-glacial to glacial sediment thickness grids for the southern pacific margin of west antarctica, netcdf files |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.864906 https://doi.org/10.1594/PANGAEA.864906 |
geographic |
Antarctic Antarctic Peninsula West Antarctica Amundsen Sea Bellingshausen Sea Pacific New Zealand |
geographic_facet |
Antarctic Antarctic Peninsula West Antarctica Amundsen Sea Bellingshausen Sea Pacific New Zealand |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Bellingshausen Sea Ice Sheet West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Bellingshausen Sea Ice Sheet West Antarctica |
op_source |
Supplement to: Lindeque, Ansa; Gohl, Karsten; Wobbe, Florian; Uenzelmann-Neben, Gabriele (2016): Preglacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica. Geochemistry, Geophysics, Geosystems, 17(10), 4276-4285, https://doi.org/10.1002/2016GC006401 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.864906 https://doi.org/10.1594/PANGAEA.864906 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.864906 https://doi.org/10.1002/2016GC006401 |
_version_ |
1766377576251523072 |