The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167
Ocean Drilling Program Leg 188, Prydz Bay, East Antarctica is part of a larger initiative to explore the Cenozoic history of the Antarctic Ice Sheet through direct drilling and sampling of the continental margins. In this paper, we present stable isotopic results from Ocean Drilling Program (ODP) Si...
Published in: | Global and Planetary Change |
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Language: | English |
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2003
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Online Access: | https://hdl.handle.net/1983/b44f4bbb-7ca8-480c-8826-8a2a07df4691 https://research-information.bris.ac.uk/en/publications/b44f4bbb-7ca8-480c-8826-8a2a07df4691 https://doi.org/10.1016/S0921-8181(03)00118-8 |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/b44f4bbb-7ca8-480c-8826-8a2a07df4691 2024-02-11T09:55:12+01:00 The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167 Theissen, KM Dunbar, RB Cooper, AK Mucciarone, DA Hoffmann, DL 2003-11 https://hdl.handle.net/1983/b44f4bbb-7ca8-480c-8826-8a2a07df4691 https://research-information.bris.ac.uk/en/publications/b44f4bbb-7ca8-480c-8826-8a2a07df4691 https://doi.org/10.1016/S0921-8181(03)00118-8 eng eng info:eu-repo/semantics/restrictedAccess Theissen , KM , Dunbar , RB , Cooper , AK , Mucciarone , DA & Hoffmann , DL 2003 , ' The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167 ' , Global and Planetary Change , vol. 39 , pp. 227 - 256 . https://doi.org/10.1016/S0921-8181(03)00118-8 article 2003 ftubristolcris https://doi.org/10.1016/S0921-8181(03)00118-8 2024-01-18T23:29:08Z Ocean Drilling Program Leg 188, Prydz Bay, East Antarctica is part of a larger initiative to explore the Cenozoic history of the Antarctic Ice Sheet through direct drilling and sampling of the continental margins. In this paper, we present stable isotopic results from Ocean Drilling Program (ODP) Site 1167 located on the Prydz Channel Trough Mouth Fan (TMF), the first Antarctic TMF to be drilled. The foraminifer-based delta(18)O record is interpreted along with sedimentary and downhole logging evidence to reconstruct the Quaternary glacial history of Prydz Bay and the adjacent Lambert Glacier Amery Ice Shelf System (LGAISS). We report an electron spin resonance age date of 36.9 + 3.3 ka at 0.45 in below sea floor and correlate suspected glacial-interglacial cycles with the global isotopic stratigraphy to improve the chronology for Site 1167. The 6180 record based on planktonic (Neogloboquadrina pachyderma (s.)) and limited benthic results (Globocassidulina crassa), indicates a trend of ice sheet expansion that was interrupted by a period of reduced ice volume and possibly warmer conditions during the early-mid-Pleistocene (0.9-1.38 Ma). An increase in delta(18)O values after - 900 ka appears to coincide with the mid-Pleistocene climate transition and the expansion of the northern hemisphere ice sheet. The 6180 record in the upper 50 m of the stratigraphic section indicates as few as three glacial-interglacial cycles, tentatively assigned as marine isotopic stages (MIS) 16-21, are preserved since the Brunhes/Matuyama paleomagnetic reversal (780 ka). This suggests that there is a large unconformity near the top of the section and/or that there may have been few extreme advances of the ice sheet since the mid-Pleistocene climate transition resulting in lowered sedimentation rates on the Prydz Channel TMF. The stable isotopic record from Site 1167 is one of the few available from the area south of the Antarctic Polar Front that has been linked with the global isotopic stratigraphy. Our results suggest the potential ... Article in Journal/Newspaper Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Lambert Glacier Neogloboquadrina pachyderma Prydz Bay University of Bristol: Bristol Research Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) Antarctic East Antarctic Ice Sheet East Antarctica Lambert Glacier ENVELOPE(67.490,67.490,-73.065,-73.065) Prydz Bay Prydz Channel ENVELOPE(73.000,73.000,-67.000,-67.000) The Antarctic Global and Planetary Change 39 3-4 227 256 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
description |
Ocean Drilling Program Leg 188, Prydz Bay, East Antarctica is part of a larger initiative to explore the Cenozoic history of the Antarctic Ice Sheet through direct drilling and sampling of the continental margins. In this paper, we present stable isotopic results from Ocean Drilling Program (ODP) Site 1167 located on the Prydz Channel Trough Mouth Fan (TMF), the first Antarctic TMF to be drilled. The foraminifer-based delta(18)O record is interpreted along with sedimentary and downhole logging evidence to reconstruct the Quaternary glacial history of Prydz Bay and the adjacent Lambert Glacier Amery Ice Shelf System (LGAISS). We report an electron spin resonance age date of 36.9 + 3.3 ka at 0.45 in below sea floor and correlate suspected glacial-interglacial cycles with the global isotopic stratigraphy to improve the chronology for Site 1167. The 6180 record based on planktonic (Neogloboquadrina pachyderma (s.)) and limited benthic results (Globocassidulina crassa), indicates a trend of ice sheet expansion that was interrupted by a period of reduced ice volume and possibly warmer conditions during the early-mid-Pleistocene (0.9-1.38 Ma). An increase in delta(18)O values after - 900 ka appears to coincide with the mid-Pleistocene climate transition and the expansion of the northern hemisphere ice sheet. The 6180 record in the upper 50 m of the stratigraphic section indicates as few as three glacial-interglacial cycles, tentatively assigned as marine isotopic stages (MIS) 16-21, are preserved since the Brunhes/Matuyama paleomagnetic reversal (780 ka). This suggests that there is a large unconformity near the top of the section and/or that there may have been few extreme advances of the ice sheet since the mid-Pleistocene climate transition resulting in lowered sedimentation rates on the Prydz Channel TMF. The stable isotopic record from Site 1167 is one of the few available from the area south of the Antarctic Polar Front that has been linked with the global isotopic stratigraphy. Our results suggest the potential ... |
format |
Article in Journal/Newspaper |
author |
Theissen, KM Dunbar, RB Cooper, AK Mucciarone, DA Hoffmann, DL |
spellingShingle |
Theissen, KM Dunbar, RB Cooper, AK Mucciarone, DA Hoffmann, DL The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167 |
author_facet |
Theissen, KM Dunbar, RB Cooper, AK Mucciarone, DA Hoffmann, DL |
author_sort |
Theissen, KM |
title |
The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167 |
title_short |
The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167 |
title_full |
The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167 |
title_fullStr |
The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167 |
title_full_unstemmed |
The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167 |
title_sort |
pleistocene evolution of the east antarctic ice sheet in the prydz bay region: stable isotopic evidence from odp site 1167 |
publishDate |
2003 |
url |
https://hdl.handle.net/1983/b44f4bbb-7ca8-480c-8826-8a2a07df4691 https://research-information.bris.ac.uk/en/publications/b44f4bbb-7ca8-480c-8826-8a2a07df4691 https://doi.org/10.1016/S0921-8181(03)00118-8 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) ENVELOPE(67.490,67.490,-73.065,-73.065) ENVELOPE(73.000,73.000,-67.000,-67.000) |
geographic |
Amery Amery Ice Shelf Antarctic East Antarctic Ice Sheet East Antarctica Lambert Glacier Prydz Bay Prydz Channel The Antarctic |
geographic_facet |
Amery Amery Ice Shelf Antarctic East Antarctic Ice Sheet East Antarctica Lambert Glacier Prydz Bay Prydz Channel The Antarctic |
genre |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Lambert Glacier Neogloboquadrina pachyderma Prydz Bay |
genre_facet |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Lambert Glacier Neogloboquadrina pachyderma Prydz Bay |
op_source |
Theissen , KM , Dunbar , RB , Cooper , AK , Mucciarone , DA & Hoffmann , DL 2003 , ' The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP site 1167 ' , Global and Planetary Change , vol. 39 , pp. 227 - 256 . https://doi.org/10.1016/S0921-8181(03)00118-8 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/S0921-8181(03)00118-8 |
container_title |
Global and Planetary Change |
container_volume |
39 |
container_issue |
3-4 |
container_start_page |
227 |
op_container_end_page |
256 |
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1790594396070084608 |