First discovery of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores
International audience Two distinct dust layers in the EPICA-Dome C ice core (75°06′S, 123°21′E, East Antarctic Plateau) have been shown to relate to individual meteoritic events. Particles forming these layers, investigated by electron microprobe, show peculiar textural, mineralogical and geochemic...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://insu.hal.science/insu-00377204 https://insu.hal.science/insu-00377204/document https://insu.hal.science/insu-00377204/file/2007GL030801.pdf https://doi.org/10.1029/2007GL030801 |
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ftunigrenoble:oai:HAL:insu-00377204v1 2024-05-12T07:56:27+00:00 First discovery of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores Narcisi, Biancamaria Robert Petit, Jean Engrand, Cécile Ente per le Nuove Technologie, l'Energia e l'Ambiente (ENEA) Centro Ricerche Casaccia 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) Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) European Project for Ice Coring in Antarctica (EPICA) 2007 https://insu.hal.science/insu-00377204 https://insu.hal.science/insu-00377204/document https://insu.hal.science/insu-00377204/file/2007GL030801.pdf https://doi.org/10.1029/2007GL030801 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GL030801 insu-00377204 https://insu.hal.science/insu-00377204 https://insu.hal.science/insu-00377204/document https://insu.hal.science/insu-00377204/file/2007GL030801.pdf doi:10.1029/2007GL030801 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-00377204 Geophysical Research Letters, 2007, 34 (L15502), 1 à 5 p. ⟨10.1029/2007GL030801⟩ Antarctica ice core micrometeorites [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2007 ftunigrenoble https://doi.org/10.1029/2007GL030801 2024-04-18T03:21:07Z International audience Two distinct dust layers in the EPICA-Dome C ice core (75°06′S, 123°21′E, East Antarctic Plateau) have been shown to relate to individual meteoritic events. Particles forming these layers, investigated by electron microprobe, show peculiar textural, mineralogical and geochemical features and closely resemble extraterrestrial debris in deep-sea sediments and polar caps. Preliminary estimates of cosmic debris input at the studied layers, obtained from Coulter Counter measurements, are 4–5 orders of magnitude greater than the yearly micrometeorite flux in East Antarctic snow and ice. The cosmic events are accurately dated through glaciological models at 434 ± 6 and 481 ± 6 ka, respectively and are located in the core climatic stratigraphy near the “Mid-Brunhes Event”. This is the first report of well-dated cosmic horizons in deep Antarctic ice cores. It significantly improves the extraterrestrial record of Antarctica and opens new correlation perspectives between long climatic records of the South polar region. Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA ice core Université Grenoble Alpes: HAL Antarctic Coulter ENVELOPE(-58.033,-58.033,-83.283,-83.283) Geophysical Research Letters 34 15 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
Antarctica ice core micrometeorites [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
Antarctica ice core micrometeorites [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Narcisi, Biancamaria Robert Petit, Jean Engrand, Cécile First discovery of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores |
topic_facet |
Antarctica ice core micrometeorites [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Two distinct dust layers in the EPICA-Dome C ice core (75°06′S, 123°21′E, East Antarctic Plateau) have been shown to relate to individual meteoritic events. Particles forming these layers, investigated by electron microprobe, show peculiar textural, mineralogical and geochemical features and closely resemble extraterrestrial debris in deep-sea sediments and polar caps. Preliminary estimates of cosmic debris input at the studied layers, obtained from Coulter Counter measurements, are 4–5 orders of magnitude greater than the yearly micrometeorite flux in East Antarctic snow and ice. The cosmic events are accurately dated through glaciological models at 434 ± 6 and 481 ± 6 ka, respectively and are located in the core climatic stratigraphy near the “Mid-Brunhes Event”. This is the first report of well-dated cosmic horizons in deep Antarctic ice cores. It significantly improves the extraterrestrial record of Antarctica and opens new correlation perspectives between long climatic records of the South polar region. |
author2 |
Ente per le Nuove Technologie, l'Energia e l'Ambiente (ENEA) Centro Ricerche Casaccia 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) Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) European Project for Ice Coring in Antarctica (EPICA) |
format |
Article in Journal/Newspaper |
author |
Narcisi, Biancamaria Robert Petit, Jean Engrand, Cécile |
author_facet |
Narcisi, Biancamaria Robert Petit, Jean Engrand, Cécile |
author_sort |
Narcisi, Biancamaria |
title |
First discovery of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores |
title_short |
First discovery of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores |
title_full |
First discovery of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores |
title_fullStr |
First discovery of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores |
title_full_unstemmed |
First discovery of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores |
title_sort |
first discovery of meteoritic events in deep antarctic (epica-dome c) ice cores |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://insu.hal.science/insu-00377204 https://insu.hal.science/insu-00377204/document https://insu.hal.science/insu-00377204/file/2007GL030801.pdf https://doi.org/10.1029/2007GL030801 |
long_lat |
ENVELOPE(-58.033,-58.033,-83.283,-83.283) |
geographic |
Antarctic Coulter |
geographic_facet |
Antarctic Coulter |
genre |
Antarc* Antarctic Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica EPICA ice core |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-00377204 Geophysical Research Letters, 2007, 34 (L15502), 1 à 5 p. ⟨10.1029/2007GL030801⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GL030801 insu-00377204 https://insu.hal.science/insu-00377204 https://insu.hal.science/insu-00377204/document https://insu.hal.science/insu-00377204/file/2007GL030801.pdf doi:10.1029/2007GL030801 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2007GL030801 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
15 |
_version_ |
1798836513945944064 |