Enrichments in authigenic uranium in glacial sedimens of the Southern Ocean
International audience Four sediment cores from the Polar frontal zone and the Antarctic zone in the Indian sector of the Southern Ocean present an increase of authigenic uranium during glacial periods. We show that this increase in uranium is due to a combination of (i) an increase in the lateral t...
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Online Access: | https://hal.science/hal-00291381 https://doi.org/10.1016/S1631-0713(02)01826-6 |
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ftceafr:oai:HAL:hal-00291381v1 2024-09-15T17:41:36+00:00 Enrichments in authigenic uranium in glacial sedimens of the Southern Ocean Dezileau, L. Bareille, Gilles Reyss, J.-L. Laboratoire de Chimie Analytique Bio-Inorganique et Environnement (LCABIE) Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Océan et Interfaces (OCEANIS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 2002 https://hal.science/hal-00291381 https://doi.org/10.1016/S1631-0713(02)01826-6 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/S1631-0713(02)01826-6 hal-00291381 https://hal.science/hal-00291381 doi:10.1016/S1631-0713(02)01826-6 Comptes Rendus Géoscience https://hal.science/hal-00291381 Comptes Rendus Géoscience, 2002, 334 (14), pp.1039-1046. ⟨10.1016/S1631-0713(02)01826-6⟩ Diagenesis Palaeoproductivity Southern Ocean Uranium [CHIM.ANAL]Chemical Sciences/Analytical chemistry info:eu-repo/semantics/article Journal articles 2002 ftceafr https://doi.org/10.1016/S1631-0713(02)01826-6 2024-07-22T13:18:30Z International audience Four sediment cores from the Polar frontal zone and the Antarctic zone in the Indian sector of the Southern Ocean present an increase of authigenic uranium during glacial periods. We show that this increase in uranium is due to a combination of (i) an increase in the lateral transport of organic matter, (ii) a decrease in the oxygen in deep waters, and (iii) a process of diagenesis. It appears that uranium concentration cannot be used as a proxy of palaeoproductivity in the Southern Ocean, as previously suggested by Kumar et al. in 1995. © 2002 Acade?mie des sciences / E?ditions scientifiques et me?dicales Elsevier SAS. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Comptes Rendus Geoscience 334 14 1039 1046 |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
Diagenesis Palaeoproductivity Southern Ocean Uranium [CHIM.ANAL]Chemical Sciences/Analytical chemistry |
spellingShingle |
Diagenesis Palaeoproductivity Southern Ocean Uranium [CHIM.ANAL]Chemical Sciences/Analytical chemistry Dezileau, L. Bareille, Gilles Reyss, J.-L. Enrichments in authigenic uranium in glacial sedimens of the Southern Ocean |
topic_facet |
Diagenesis Palaeoproductivity Southern Ocean Uranium [CHIM.ANAL]Chemical Sciences/Analytical chemistry |
description |
International audience Four sediment cores from the Polar frontal zone and the Antarctic zone in the Indian sector of the Southern Ocean present an increase of authigenic uranium during glacial periods. We show that this increase in uranium is due to a combination of (i) an increase in the lateral transport of organic matter, (ii) a decrease in the oxygen in deep waters, and (iii) a process of diagenesis. It appears that uranium concentration cannot be used as a proxy of palaeoproductivity in the Southern Ocean, as previously suggested by Kumar et al. in 1995. © 2002 Acade?mie des sciences / E?ditions scientifiques et me?dicales Elsevier SAS. |
author2 |
Laboratoire de Chimie Analytique Bio-Inorganique et Environnement (LCABIE) Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Océan et Interfaces (OCEANIS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
format |
Article in Journal/Newspaper |
author |
Dezileau, L. Bareille, Gilles Reyss, J.-L. |
author_facet |
Dezileau, L. Bareille, Gilles Reyss, J.-L. |
author_sort |
Dezileau, L. |
title |
Enrichments in authigenic uranium in glacial sedimens of the Southern Ocean |
title_short |
Enrichments in authigenic uranium in glacial sedimens of the Southern Ocean |
title_full |
Enrichments in authigenic uranium in glacial sedimens of the Southern Ocean |
title_fullStr |
Enrichments in authigenic uranium in glacial sedimens of the Southern Ocean |
title_full_unstemmed |
Enrichments in authigenic uranium in glacial sedimens of the Southern Ocean |
title_sort |
enrichments in authigenic uranium in glacial sedimens of the southern ocean |
publisher |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.science/hal-00291381 https://doi.org/10.1016/S1631-0713(02)01826-6 |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Comptes Rendus Géoscience https://hal.science/hal-00291381 Comptes Rendus Géoscience, 2002, 334 (14), pp.1039-1046. ⟨10.1016/S1631-0713(02)01826-6⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S1631-0713(02)01826-6 hal-00291381 https://hal.science/hal-00291381 doi:10.1016/S1631-0713(02)01826-6 |
op_doi |
https://doi.org/10.1016/S1631-0713(02)01826-6 |
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Comptes Rendus Geoscience |
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334 |
container_issue |
14 |
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1039 |
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1046 |
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