Evidence for a palaeo-subglacial lake on the Antarctic continental shelf
their control on ice-sheet dynamics and their ability to harbour life remain poorly characterized. Here we present evidence for a palaeo-subglacial lake on the Antarctic continental shelf. A distinct sediment facies recovered from a bedrock basin in Pine Island Bay indicates deposition within a low-...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/352029 2023-07-23T04:13:50+02:00 Evidence for a palaeo-subglacial lake on the Antarctic continental shelf Kuhn, Gerhard Hillenbrand, Claus-Dieter Kasten, Sabine Smith, James A. Nitsche, Frank O. Frederichs, T. Wiers, Steffen Ehrmann, Werner Klages, Johann P. Mogollon, josé M. Geochemistry Bio-, hydro-, and environmental geochemistry 2017-06-01 image/pdf https://dspace.library.uu.nl/handle/1874/352029 en eng 2041-1723 https://dspace.library.uu.nl/handle/1874/352029 info:eu-repo/semantics/OpenAccess Article 2017 ftunivutrecht 2023-07-02T02:09:46Z their control on ice-sheet dynamics and their ability to harbour life remain poorly characterized. Here we present evidence for a palaeo-subglacial lake on the Antarctic continental shelf. A distinct sediment facies recovered from a bedrock basin in Pine Island Bay indicates deposition within a low-energy lake environment. Diffusive-advection modelling demonstrates that low chloride concentrations in the pore water of the corresponding sediments can only be explained by initial deposition of this facies in a freshwater setting. These observations indicate that an active subglacial meltwater network, similar to that observed beneath the extant ice sheet, was also active during the last glacial period. It also provides a new framework for refining the exploration of these unique environments. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Pine Island Bay Utrecht University Repository Antarctic Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) The Antarctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
description |
their control on ice-sheet dynamics and their ability to harbour life remain poorly characterized. Here we present evidence for a palaeo-subglacial lake on the Antarctic continental shelf. A distinct sediment facies recovered from a bedrock basin in Pine Island Bay indicates deposition within a low-energy lake environment. Diffusive-advection modelling demonstrates that low chloride concentrations in the pore water of the corresponding sediments can only be explained by initial deposition of this facies in a freshwater setting. These observations indicate that an active subglacial meltwater network, similar to that observed beneath the extant ice sheet, was also active during the last glacial period. It also provides a new framework for refining the exploration of these unique environments. |
author2 |
Geochemistry Bio-, hydro-, and environmental geochemistry |
format |
Article in Journal/Newspaper |
author |
Kuhn, Gerhard Hillenbrand, Claus-Dieter Kasten, Sabine Smith, James A. Nitsche, Frank O. Frederichs, T. Wiers, Steffen Ehrmann, Werner Klages, Johann P. Mogollon, josé M. |
spellingShingle |
Kuhn, Gerhard Hillenbrand, Claus-Dieter Kasten, Sabine Smith, James A. Nitsche, Frank O. Frederichs, T. Wiers, Steffen Ehrmann, Werner Klages, Johann P. Mogollon, josé M. Evidence for a palaeo-subglacial lake on the Antarctic continental shelf |
author_facet |
Kuhn, Gerhard Hillenbrand, Claus-Dieter Kasten, Sabine Smith, James A. Nitsche, Frank O. Frederichs, T. Wiers, Steffen Ehrmann, Werner Klages, Johann P. Mogollon, josé M. |
author_sort |
Kuhn, Gerhard |
title |
Evidence for a palaeo-subglacial lake on the Antarctic continental shelf |
title_short |
Evidence for a palaeo-subglacial lake on the Antarctic continental shelf |
title_full |
Evidence for a palaeo-subglacial lake on the Antarctic continental shelf |
title_fullStr |
Evidence for a palaeo-subglacial lake on the Antarctic continental shelf |
title_full_unstemmed |
Evidence for a palaeo-subglacial lake on the Antarctic continental shelf |
title_sort |
evidence for a palaeo-subglacial lake on the antarctic continental shelf |
publishDate |
2017 |
url |
https://dspace.library.uu.nl/handle/1874/352029 |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Antarctic Island Bay Pine Island Bay The Antarctic |
geographic_facet |
Antarctic Island Bay Pine Island Bay The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Pine Island Bay |
genre_facet |
Antarc* Antarctic Ice Sheet Pine Island Bay |
op_relation |
2041-1723 https://dspace.library.uu.nl/handle/1874/352029 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772181722150993920 |