A silicon isotopic perspective on the contribution of diagenesis to the sedimentary silicon budget in the Southern Ocean
International audience Diatoms are known to fractionate silicon isotopes during the formation of their frustules causing the silicon isotopic composition of biogenic silica to track the degree of silicic acid consumption in surface waters. Despite a growing body of work that uses this proxy to recon...
Published in: | Geochimica et Cosmochimica Acta |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://insu.hal.science/insu-03721922 https://insu.hal.science/insu-03721922/document https://insu.hal.science/insu-03721922/file/1-s2.0-S0016703722001843-main.pdf https://doi.org/10.1016/j.gca.2022.04.010 |
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ftuniparissaclay:oai:HAL:insu-03721922v1 |
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openpolar |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
Silicon cycle Silicon stable isotopes Benthic nutrient fluxes Early diagenesis Southern Ocean PANOPLY [SDU]Sciences of the Universe [physics] |
spellingShingle |
Silicon cycle Silicon stable isotopes Benthic nutrient fluxes Early diagenesis Southern Ocean PANOPLY [SDU]Sciences of the Universe [physics] Closset, Ivia Brzezinski, Mark A. Cardinal, Damien Dapoigny, Arnaud Jones, Janice L. Robinson, Rebecca S. A silicon isotopic perspective on the contribution of diagenesis to the sedimentary silicon budget in the Southern Ocean |
topic_facet |
Silicon cycle Silicon stable isotopes Benthic nutrient fluxes Early diagenesis Southern Ocean PANOPLY [SDU]Sciences of the Universe [physics] |
description |
International audience Diatoms are known to fractionate silicon isotopes during the formation of their frustules causing the silicon isotopic composition of biogenic silica to track the degree of silicic acid consumption in surface waters. Despite a growing body of work that uses this proxy to reconstruct past changes in silicic acid utilization, the understanding of the benthic silicon cycle, particularly the identification and quantification of the processes that potentially alter the silicon isotopic composition of biogenic silica during early diagenesis is still lacking. We investigated these processes by comparing the silicon isotopic composition of pore water silicic acid, biogenic silica and, for the first time, lithogenic silica from five sediment cores collected in the deep basin of the Southern Ocean representing a diversity of sedimentation regimes. Silicic acid concentrations and the isotopic composition of Southern Ocean pore waters were the result of a dynamic balance between the dissolution of biogenic silica, reactive lithogenic silica phases and Si re-precipitation with the relative importance of each processes differing significantly between regions. The results are consistent with the formation of authigenic alumino-silicates derived from dissolved biogenic silica in the Sub-Antarctic Zone and in the Antarctic Zone (on average 12 ± 5% and 17 ± 13%, respectively). Since this latter process can fractionate silicon isotopes, this implies that, even if the silicon isotopic composition of diatoms preserved in the sediments is a reliable proxy for silicic acid utilization in the past ocean, care must be taken to extract a clean biogenic silica phase free of authigenic clays and lithogenic phases from sediments to eliminate this potential bias when interpreting isotopic records. |
author2 |
Marine Science Institute Santa Barbara (MSI) University of California Santa Barbara (UC Santa Barbara) University of California (UC)-University of California (UC) Department of Ecology, Evolution and Marine Biology Santa Barbara (EEMB) Cycles biogéochimiques marins : processus et perturbations (CYBIOM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) 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) Graduate School of Oceanography Narragansett University of Rhode Island (URI) |
format |
Article in Journal/Newspaper |
author |
Closset, Ivia Brzezinski, Mark A. Cardinal, Damien Dapoigny, Arnaud Jones, Janice L. Robinson, Rebecca S. |
author_facet |
Closset, Ivia Brzezinski, Mark A. Cardinal, Damien Dapoigny, Arnaud Jones, Janice L. Robinson, Rebecca S. |
author_sort |
Closset, Ivia |
title |
A silicon isotopic perspective on the contribution of diagenesis to the sedimentary silicon budget in the Southern Ocean |
title_short |
A silicon isotopic perspective on the contribution of diagenesis to the sedimentary silicon budget in the Southern Ocean |
title_full |
A silicon isotopic perspective on the contribution of diagenesis to the sedimentary silicon budget in the Southern Ocean |
title_fullStr |
A silicon isotopic perspective on the contribution of diagenesis to the sedimentary silicon budget in the Southern Ocean |
title_full_unstemmed |
A silicon isotopic perspective on the contribution of diagenesis to the sedimentary silicon budget in the Southern Ocean |
title_sort |
silicon isotopic perspective on the contribution of diagenesis to the sedimentary silicon budget in the southern ocean |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03721922 https://insu.hal.science/insu-03721922/document https://insu.hal.science/insu-03721922/file/1-s2.0-S0016703722001843-main.pdf https://doi.org/10.1016/j.gca.2022.04.010 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
ISSN: 0016-7037 EISSN: 0016-7037 Geochimica et Cosmochimica Acta https://insu.hal.science/insu-03721922 Geochimica et Cosmochimica Acta, 2022, 327, pp.298-313. ⟨10.1016/j.gca.2022.04.010⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gca.2022.04.010 insu-03721922 https://insu.hal.science/insu-03721922 https://insu.hal.science/insu-03721922/document https://insu.hal.science/insu-03721922/file/1-s2.0-S0016703722001843-main.pdf BIBCODE: 2022GeCoA.327.298C doi:10.1016/j.gca.2022.04.010 WOS: 000807737700007 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.gca.2022.04.010 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
327 |
container_start_page |
298 |
op_container_end_page |
313 |
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1802012066970599424 |
spelling |
ftuniparissaclay:oai:HAL:insu-03721922v1 2024-06-16T07:35:19+00:00 A silicon isotopic perspective on the contribution of diagenesis to the sedimentary silicon budget in the Southern Ocean Closset, Ivia Brzezinski, Mark A. Cardinal, Damien Dapoigny, Arnaud Jones, Janice L. Robinson, Rebecca S. Marine Science Institute Santa Barbara (MSI) University of California Santa Barbara (UC Santa Barbara) University of California (UC)-University of California (UC) Department of Ecology, Evolution and Marine Biology Santa Barbara (EEMB) Cycles biogéochimiques marins : processus et perturbations (CYBIOM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) 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) Graduate School of Oceanography Narragansett University of Rhode Island (URI) 2022 https://insu.hal.science/insu-03721922 https://insu.hal.science/insu-03721922/document https://insu.hal.science/insu-03721922/file/1-s2.0-S0016703722001843-main.pdf https://doi.org/10.1016/j.gca.2022.04.010 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gca.2022.04.010 insu-03721922 https://insu.hal.science/insu-03721922 https://insu.hal.science/insu-03721922/document https://insu.hal.science/insu-03721922/file/1-s2.0-S0016703722001843-main.pdf BIBCODE: 2022GeCoA.327.298C doi:10.1016/j.gca.2022.04.010 WOS: 000807737700007 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0016-7037 EISSN: 0016-7037 Geochimica et Cosmochimica Acta https://insu.hal.science/insu-03721922 Geochimica et Cosmochimica Acta, 2022, 327, pp.298-313. ⟨10.1016/j.gca.2022.04.010⟩ Silicon cycle Silicon stable isotopes Benthic nutrient fluxes Early diagenesis Southern Ocean PANOPLY [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftuniparissaclay https://doi.org/10.1016/j.gca.2022.04.010 2024-05-17T00:03:22Z International audience Diatoms are known to fractionate silicon isotopes during the formation of their frustules causing the silicon isotopic composition of biogenic silica to track the degree of silicic acid consumption in surface waters. Despite a growing body of work that uses this proxy to reconstruct past changes in silicic acid utilization, the understanding of the benthic silicon cycle, particularly the identification and quantification of the processes that potentially alter the silicon isotopic composition of biogenic silica during early diagenesis is still lacking. We investigated these processes by comparing the silicon isotopic composition of pore water silicic acid, biogenic silica and, for the first time, lithogenic silica from five sediment cores collected in the deep basin of the Southern Ocean representing a diversity of sedimentation regimes. Silicic acid concentrations and the isotopic composition of Southern Ocean pore waters were the result of a dynamic balance between the dissolution of biogenic silica, reactive lithogenic silica phases and Si re-precipitation with the relative importance of each processes differing significantly between regions. The results are consistent with the formation of authigenic alumino-silicates derived from dissolved biogenic silica in the Sub-Antarctic Zone and in the Antarctic Zone (on average 12 ± 5% and 17 ± 13%, respectively). Since this latter process can fractionate silicon isotopes, this implies that, even if the silicon isotopic composition of diatoms preserved in the sediments is a reliable proxy for silicic acid utilization in the past ocean, care must be taken to extract a clean biogenic silica phase free of authigenic clays and lithogenic phases from sediments to eliminate this potential bias when interpreting isotopic records. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Archives ouvertes de Paris-Saclay Antarctic Southern Ocean The Antarctic Geochimica et Cosmochimica Acta 327 298 313 |