Brine micro-droplets and solid inclusions in accreted ice from Lake Vostok (East Antarctica)
International audience Lake Vostok, the largest Antarctic sub-glacial lake (14,000 km2), lies beneath nearly 4 km of ice. Sub-glacial geophysical observations and studies of ice accreting at the lake-glacier interface are the only means available to obtain information on the environment and dynamics...
Published in: | Geophysical Research Letters |
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ftunivnantes:oai:HAL:insu-00374142v1 2023-05-15T13:35:39+02:00 Brine micro-droplets and solid inclusions in accreted ice from Lake Vostok (East Antarctica) de Angelis, Martine Morel-Fourcade, Marie-Christine Barnola, Jean-Marc Susini, Jean Duval, Paul Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) European Synchrotron Radiation Facility (ESRF) Joint program involving Russia France USA 2005 https://hal-insu.archives-ouvertes.fr/insu-00374142 https://hal-insu.archives-ouvertes.fr/insu-00374142/document https://hal-insu.archives-ouvertes.fr/insu-00374142/file/2005GL022460.pdf https://doi.org/10.1029/2005GL022460 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GL022460 insu-00374142 https://hal-insu.archives-ouvertes.fr/insu-00374142 https://hal-insu.archives-ouvertes.fr/insu-00374142/document https://hal-insu.archives-ouvertes.fr/insu-00374142/file/2005GL022460.pdf doi:10.1029/2005GL022460 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-00374142 Geophysical Research Letters, 2005, 32 (L12501), 1 à 4 p. ⟨10.1029/2005GL022460⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2005 ftunivnantes https://doi.org/10.1029/2005GL022460 2023-03-01T02:39:38Z International audience Lake Vostok, the largest Antarctic sub-glacial lake (14,000 km2), lies beneath nearly 4 km of ice. Sub-glacial geophysical observations and studies of ice accreting at the lake-glacier interface are the only means available to obtain information on the environment and dynamics of this huge water body formed several million years ago. Accretion ice has been studied using high-resolution synchrotron X-Ray micro-fluorescence. For the first time, liquid brine micro-droplets (3-10 μm) are observed, coexisting with large irregular sulfur-rich aggregates (10-800 μm) containing gases and a mixture of very fine particles. Most of these objects are sequestered inside large crystals that grew slowly after ice formation. Their structure and composition support the existence of hydrothermal activity at the lake bottom and the occurrence of haline water pulses carrying fine solid debris and eventually biota from a deeper evaporitic reservoir into the lake. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Université de Nantes: HAL-UNIV-NANTES Antarctic East Antarctica Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Lake Vostok ENVELOPE(106.000,106.000,-77.500,-77.500) Geophysical Research Letters 32 12 n/a n/a |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology de Angelis, Martine Morel-Fourcade, Marie-Christine Barnola, Jean-Marc Susini, Jean Duval, Paul Brine micro-droplets and solid inclusions in accreted ice from Lake Vostok (East Antarctica) |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Lake Vostok, the largest Antarctic sub-glacial lake (14,000 km2), lies beneath nearly 4 km of ice. Sub-glacial geophysical observations and studies of ice accreting at the lake-glacier interface are the only means available to obtain information on the environment and dynamics of this huge water body formed several million years ago. Accretion ice has been studied using high-resolution synchrotron X-Ray micro-fluorescence. For the first time, liquid brine micro-droplets (3-10 μm) are observed, coexisting with large irregular sulfur-rich aggregates (10-800 μm) containing gases and a mixture of very fine particles. Most of these objects are sequestered inside large crystals that grew slowly after ice formation. Their structure and composition support the existence of hydrothermal activity at the lake bottom and the occurrence of haline water pulses carrying fine solid debris and eventually biota from a deeper evaporitic reservoir into the lake. |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) European Synchrotron Radiation Facility (ESRF) Joint program involving Russia France USA |
format |
Article in Journal/Newspaper |
author |
de Angelis, Martine Morel-Fourcade, Marie-Christine Barnola, Jean-Marc Susini, Jean Duval, Paul |
author_facet |
de Angelis, Martine Morel-Fourcade, Marie-Christine Barnola, Jean-Marc Susini, Jean Duval, Paul |
author_sort |
de Angelis, Martine |
title |
Brine micro-droplets and solid inclusions in accreted ice from Lake Vostok (East Antarctica) |
title_short |
Brine micro-droplets and solid inclusions in accreted ice from Lake Vostok (East Antarctica) |
title_full |
Brine micro-droplets and solid inclusions in accreted ice from Lake Vostok (East Antarctica) |
title_fullStr |
Brine micro-droplets and solid inclusions in accreted ice from Lake Vostok (East Antarctica) |
title_full_unstemmed |
Brine micro-droplets and solid inclusions in accreted ice from Lake Vostok (East Antarctica) |
title_sort |
brine micro-droplets and solid inclusions in accreted ice from lake vostok (east antarctica) |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00374142 https://hal-insu.archives-ouvertes.fr/insu-00374142/document https://hal-insu.archives-ouvertes.fr/insu-00374142/file/2005GL022460.pdf https://doi.org/10.1029/2005GL022460 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(106.000,106.000,-77.500,-77.500) |
geographic |
Antarctic East Antarctica Glacial Lake Lake Vostok |
geographic_facet |
Antarctic East Antarctica Glacial Lake Lake Vostok |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-00374142 Geophysical Research Letters, 2005, 32 (L12501), 1 à 4 p. ⟨10.1029/2005GL022460⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GL022460 insu-00374142 https://hal-insu.archives-ouvertes.fr/insu-00374142 https://hal-insu.archives-ouvertes.fr/insu-00374142/document https://hal-insu.archives-ouvertes.fr/insu-00374142/file/2005GL022460.pdf doi:10.1029/2005GL022460 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2005GL022460 |
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Geophysical Research Letters |
container_volume |
32 |
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12 |
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1766068554078093312 |