Palaeoenvironment of the Weddell Sea and Amundsen Sea - eastern Ross Sea basins, Antarctica: Insights from comprehensive seismostratigraphic analysis
In combining existing multichannel seismic reflection seismic data in the Weddell Sea deep-sea basin, with existing and newly acquired data in the Amundsen Sea and Ross Sea basins, previously unknown sequences representing the pre-glacial to glacial palaeoenvironmental development of the West Antarc...
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Universität Bremen
2014
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Online Access: | https://media.suub.uni-bremen.de/handle/elib/1018 https://nbn-resolving.org/urn:nbn:de:gbv:46-00105128-16 |
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/1018 2023-05-15T13:23:37+02:00 Palaeoenvironment of the Weddell Sea and Amundsen Sea - eastern Ross Sea basins, Antarctica: Insights from comprehensive seismostratigraphic analysis Palaeoumwelt des Weddellmeer und Amundsenmeer - östlichen Rossmeer Beckens, Antarktis : Erkenntnisse aus umfassenden seismischen stratigraphische Analyse Lindeque, Ansa Miller, Heinrich Gohl, Karsten Spiegel, Cornelia 2014-05-19 application/pdf https://media.suub.uni-bremen.de/handle/elib/1018 https://nbn-resolving.org/urn:nbn:de:gbv:46-00105128-16 eng eng Universität Bremen FB5 Geowissenschaften https://media.suub.uni-bremen.de/handle/elib/1018 urn:nbn:de:gbv:46-00105128-16 info:eu-repo/semantics/openAccess sediment thickness bottom current seismic reflection data basin analysis stratigraphy sediment drift 500 500 Science ddc:500 Dissertation doctoralThesis 2014 ftsubbremen 2022-11-09T07:09:30Z In combining existing multichannel seismic reflection seismic data in the Weddell Sea deep-sea basin, with existing and newly acquired data in the Amundsen Sea and Ross Sea basins, previously unknown sequences representing the pre-glacial to glacial palaeoenvironmental development of the West Antarctic Margin were identified. Pre-glacial sediment deposition centres seemed to have changed near or after the Eocene/Oligocene boundary (~34 Ma) when the first major ice sheets advanced to and across the shelf. The middle Miocene (~16 Ma) full glacial sequences indicate a new depocentre formed North of the Amundsen Sea Embayment. Smaller depocentres in the Bellingshausen Sea and Antarctic Peninsula basins, shifted eastward. Calculations indicate ~4.6 km (~10.2 million km3) of West Antarctica's landmass were eroded since the Late Cretaceous and deposited in the Southern Pacific. This has implications for the palaeotopographic and palaeobathymetric reconstructions, and ice sheet climate models. Doctoral or Postdoctoral Thesis Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Antarktis* Bellingshausen Sea Ice Sheet Ross Sea Weddell Sea Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Antarctic Antarctic Peninsula Weddell Sea Ross Sea Amundsen Sea Bellingshausen Sea Pacific Weddell |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
sediment thickness bottom current seismic reflection data basin analysis stratigraphy sediment drift 500 500 Science ddc:500 |
spellingShingle |
sediment thickness bottom current seismic reflection data basin analysis stratigraphy sediment drift 500 500 Science ddc:500 Lindeque, Ansa Palaeoenvironment of the Weddell Sea and Amundsen Sea - eastern Ross Sea basins, Antarctica: Insights from comprehensive seismostratigraphic analysis |
topic_facet |
sediment thickness bottom current seismic reflection data basin analysis stratigraphy sediment drift 500 500 Science ddc:500 |
description |
In combining existing multichannel seismic reflection seismic data in the Weddell Sea deep-sea basin, with existing and newly acquired data in the Amundsen Sea and Ross Sea basins, previously unknown sequences representing the pre-glacial to glacial palaeoenvironmental development of the West Antarctic Margin were identified. Pre-glacial sediment deposition centres seemed to have changed near or after the Eocene/Oligocene boundary (~34 Ma) when the first major ice sheets advanced to and across the shelf. The middle Miocene (~16 Ma) full glacial sequences indicate a new depocentre formed North of the Amundsen Sea Embayment. Smaller depocentres in the Bellingshausen Sea and Antarctic Peninsula basins, shifted eastward. Calculations indicate ~4.6 km (~10.2 million km3) of West Antarctica's landmass were eroded since the Late Cretaceous and deposited in the Southern Pacific. This has implications for the palaeotopographic and palaeobathymetric reconstructions, and ice sheet climate models. |
author2 |
Miller, Heinrich Gohl, Karsten Spiegel, Cornelia |
format |
Doctoral or Postdoctoral Thesis |
author |
Lindeque, Ansa |
author_facet |
Lindeque, Ansa |
author_sort |
Lindeque, Ansa |
title |
Palaeoenvironment of the Weddell Sea and Amundsen Sea - eastern Ross Sea basins, Antarctica: Insights from comprehensive seismostratigraphic analysis |
title_short |
Palaeoenvironment of the Weddell Sea and Amundsen Sea - eastern Ross Sea basins, Antarctica: Insights from comprehensive seismostratigraphic analysis |
title_full |
Palaeoenvironment of the Weddell Sea and Amundsen Sea - eastern Ross Sea basins, Antarctica: Insights from comprehensive seismostratigraphic analysis |
title_fullStr |
Palaeoenvironment of the Weddell Sea and Amundsen Sea - eastern Ross Sea basins, Antarctica: Insights from comprehensive seismostratigraphic analysis |
title_full_unstemmed |
Palaeoenvironment of the Weddell Sea and Amundsen Sea - eastern Ross Sea basins, Antarctica: Insights from comprehensive seismostratigraphic analysis |
title_sort |
palaeoenvironment of the weddell sea and amundsen sea - eastern ross sea basins, antarctica: insights from comprehensive seismostratigraphic analysis |
publisher |
Universität Bremen |
publishDate |
2014 |
url |
https://media.suub.uni-bremen.de/handle/elib/1018 https://nbn-resolving.org/urn:nbn:de:gbv:46-00105128-16 |
geographic |
Antarctic Antarctic Peninsula Weddell Sea Ross Sea Amundsen Sea Bellingshausen Sea Pacific Weddell |
geographic_facet |
Antarctic Antarctic Peninsula Weddell Sea Ross Sea Amundsen Sea Bellingshausen Sea Pacific Weddell |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Antarktis* Bellingshausen Sea Ice Sheet Ross Sea Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Antarktis* Bellingshausen Sea Ice Sheet Ross Sea Weddell Sea |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/1018 urn:nbn:de:gbv:46-00105128-16 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766373637519048704 |