Constraints on hydrothermal processes and water exchange in Lake Vostok from helium isotopes
International audience Lake Vostok, the largest subglacial lake in Antarctica, is covered by the East Antarctic ice sheet, which varies in thickness between 3,750 and 4,100 m (ref. 1). At a depth of 3,539 m in the drill hole at Vostok station, sharp changes in stable isotopes and the gas content of...
Published in: | Nature |
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Main Authors: | , , , , |
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Format: | Article in Journal/Newspaper |
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2001
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Online Access: | https://hal.archives-ouvertes.fr/hal-03124822 https://doi.org/10.1038/35078045 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment JEAN-BAPTISTE, Philippe Petit, Jean-Robert Lipenkov, Vladimir Ya. Raynaud, Dominique Barkov, Nartsiss Constraints on hydrothermal processes and water exchange in Lake Vostok from helium isotopes |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Lake Vostok, the largest subglacial lake in Antarctica, is covered by the East Antarctic ice sheet, which varies in thickness between 3,750 and 4,100 m (ref. 1). At a depth of 3,539 m in the drill hole at Vostok station, sharp changes in stable isotopes and the gas content of the ice delineate the boundary between glacier ice and ice accreted through re-freezing of lake water2. Unlike most gases, helium can be incorporated into the crystal structure of ice during freezing3, making helium isotopes in the accreted ice a valuable source of information on lake environment. Here we present helium isotope measurements from the deep section of the Vostok ice core that encompasses the boundary between the glacier ice and accreted ice, showing that the accreted ice is enriched by a helium source with a radiogenic isotope signature typical of an old continental province. This result rules out any significant hydrothermal energy input into the lake from high-enthalpy mantle processes, which would be expected to produce a much higher 3He/4He ratio. Based on the average helium flux for continental areas, the helium budget of the lake leads to a renewal time of the lake of the order of 5,000 years. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-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 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) Arctic and Antarctic Research Institute (AARI) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) |
format |
Article in Journal/Newspaper |
author |
JEAN-BAPTISTE, Philippe Petit, Jean-Robert Lipenkov, Vladimir Ya. Raynaud, Dominique Barkov, Nartsiss |
author_facet |
JEAN-BAPTISTE, Philippe Petit, Jean-Robert Lipenkov, Vladimir Ya. Raynaud, Dominique Barkov, Nartsiss |
author_sort |
JEAN-BAPTISTE, Philippe |
title |
Constraints on hydrothermal processes and water exchange in Lake Vostok from helium isotopes |
title_short |
Constraints on hydrothermal processes and water exchange in Lake Vostok from helium isotopes |
title_full |
Constraints on hydrothermal processes and water exchange in Lake Vostok from helium isotopes |
title_fullStr |
Constraints on hydrothermal processes and water exchange in Lake Vostok from helium isotopes |
title_full_unstemmed |
Constraints on hydrothermal processes and water exchange in Lake Vostok from helium isotopes |
title_sort |
constraints on hydrothermal processes and water exchange in lake vostok from helium isotopes |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.archives-ouvertes.fr/hal-03124822 https://doi.org/10.1038/35078045 |
long_lat |
ENVELOPE(106.000,106.000,-77.500,-77.500) ENVELOPE(106.837,106.837,-78.464,-78.464) |
geographic |
Antarctic East Antarctic Ice Sheet Lake Vostok Vostok Station |
geographic_facet |
Antarctic East Antarctic Ice Sheet Lake Vostok Vostok Station |
genre |
Antarc* Antarctic Antarctica ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet |
op_source |
ISSN: 0028-0836 EISSN: 1476-4679 Nature https://hal.archives-ouvertes.fr/hal-03124822 Nature, Nature Publishing Group, 2001, 411 (6836), pp.460-462. ⟨10.1038/35078045⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/35078045 hal-03124822 https://hal.archives-ouvertes.fr/hal-03124822 doi:10.1038/35078045 |
op_doi |
https://doi.org/10.1038/35078045 |
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Nature |
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411 |
container_issue |
6836 |
container_start_page |
460 |
op_container_end_page |
462 |
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1766249093658574848 |
spelling |
ftccsdartic:oai:HAL:hal-03124822v1 2023-05-15T13:48:19+02:00 Constraints on hydrothermal processes and water exchange in Lake Vostok from helium isotopes JEAN-BAPTISTE, Philippe Petit, Jean-Robert Lipenkov, Vladimir Ya. Raynaud, Dominique Barkov, Nartsiss Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-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 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) Arctic and Antarctic Research Institute (AARI) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) 2001-05 https://hal.archives-ouvertes.fr/hal-03124822 https://doi.org/10.1038/35078045 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/35078045 hal-03124822 https://hal.archives-ouvertes.fr/hal-03124822 doi:10.1038/35078045 ISSN: 0028-0836 EISSN: 1476-4679 Nature https://hal.archives-ouvertes.fr/hal-03124822 Nature, Nature Publishing Group, 2001, 411 (6836), pp.460-462. ⟨10.1038/35078045⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2001 ftccsdartic https://doi.org/10.1038/35078045 2021-12-19T00:32:17Z International audience Lake Vostok, the largest subglacial lake in Antarctica, is covered by the East Antarctic ice sheet, which varies in thickness between 3,750 and 4,100 m (ref. 1). At a depth of 3,539 m in the drill hole at Vostok station, sharp changes in stable isotopes and the gas content of the ice delineate the boundary between glacier ice and ice accreted through re-freezing of lake water2. Unlike most gases, helium can be incorporated into the crystal structure of ice during freezing3, making helium isotopes in the accreted ice a valuable source of information on lake environment. Here we present helium isotope measurements from the deep section of the Vostok ice core that encompasses the boundary between the glacier ice and accreted ice, showing that the accreted ice is enriched by a helium source with a radiogenic isotope signature typical of an old continental province. This result rules out any significant hydrothermal energy input into the lake from high-enthalpy mantle processes, which would be expected to produce a much higher 3He/4He ratio. Based on the average helium flux for continental areas, the helium budget of the lake leads to a renewal time of the lake of the order of 5,000 years. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic East Antarctic Ice Sheet Lake Vostok ENVELOPE(106.000,106.000,-77.500,-77.500) Vostok Station ENVELOPE(106.837,106.837,-78.464,-78.464) Nature 411 6836 460 462 |