Carbonate diagenesis in the methane-rich sediments of the Beringian margin, IODP 323 Expedition
International audience During IODP expedition 323 in the Bering Sea (July 5- September 4, 2009) a series of drilling (down to 750 meters below sea floor) was realized at 7 sites localized on the Umnak plateau (U1339), on the Bowers Ridge (U1340, U1341, U1342) and on the Beringian margin (U1343, U134...
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Format: | Other/Unknown Material |
Language: | English |
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HAL CCSD
2010
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Online Access: | https://hal.archives-ouvertes.fr/hal-00908630 |
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fttriple:oai:gotriple.eu:10670/1.duwo7e |
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openpolar |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
[1041] GEOCHEMISTRY [0463] BIOGEOSCIENCES [0454] BIOGEOSCIENCES Microbe/mineral interactions Isotopic composition and chemistry Oxidation/reduction reactions [0471] BIOGEOSCIENCES Stable isotope geochemistry geo envir |
spellingShingle |
[1041] GEOCHEMISTRY [0463] BIOGEOSCIENCES [0454] BIOGEOSCIENCES Microbe/mineral interactions Isotopic composition and chemistry Oxidation/reduction reactions [0471] BIOGEOSCIENCES Stable isotope geochemistry geo envir Pierre, Catherine Blanc-Valleron, Marie-Madeleine März, Christian Ravelo, Ana Christina Takahashi, Kozo Alvarez Zarikian, Carlos A. Carbonate diagenesis in the methane-rich sediments of the Beringian margin, IODP 323 Expedition |
topic_facet |
[1041] GEOCHEMISTRY [0463] BIOGEOSCIENCES [0454] BIOGEOSCIENCES Microbe/mineral interactions Isotopic composition and chemistry Oxidation/reduction reactions [0471] BIOGEOSCIENCES Stable isotope geochemistry geo envir |
description |
International audience During IODP expedition 323 in the Bering Sea (July 5- September 4, 2009) a series of drilling (down to 750 meters below sea floor) was realized at 7 sites localized on the Umnak plateau (U1339), on the Bowers Ridge (U1340, U1341, U1342) and on the Beringian margin (U1343, U1344, U1345) the oldest sediments dated at 5 Myrs were recovered at Sites U1340 and U1341. Diagenetic carbonates are present at all Sites either as nodules and cm to dm thick layers, or as isolated acicular crystals, within the diatom-rich oozes of the Bering Sea, which are also characterized by their extreme richness in methane. The mineralogical, geochemical and isotopic study of diagenetic carbonates from Sites U1343, U1344 and U1345 was realized to characterize the nature of inorganic and microbial processes responsible for this diagenesis, and to determine the composition and origin of fluids in which these carbonates were precipitated. The carbonate mineralogy is very complex it is represented by composite mixtures of magnesian calcite and dolomite of various composition. Fe-rich dolomite/siderite dominate below ~260 mbsf at Site U1343 and ~200 mbsf at Site U1344. The isotopic compositions of the diagenetic carbonates display wide ranges of variations both for calcite (+2.84 < δ18O ‰ < +6.92 -20.52 < δ13C ‰ <+4.83) and dolomite (+3.58< δ18O ‰ < +9.19; +1.28 < δ13C ‰ <+11.37). The δ13C values clearly indicate that methanogenesis was involved in the sediments during microbial fermentation of organic matter : in this reaction, the 13C-rich CO2 was converted to carbonate alkalinity via silicate weathering and the 13C-poor methane was oxidized as bicarbonate via anaerobic oxidation of methane coupled with bacterial sulfate reduction as it is shown by the association of pyrite with the diagenetic carbonates. |
author2 |
Paléoclimats, proxies, processus (PALEOPROXUS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris) 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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Other/Unknown Material |
author |
Pierre, Catherine Blanc-Valleron, Marie-Madeleine März, Christian Ravelo, Ana Christina Takahashi, Kozo Alvarez Zarikian, Carlos A. |
author_facet |
Pierre, Catherine Blanc-Valleron, Marie-Madeleine März, Christian Ravelo, Ana Christina Takahashi, Kozo Alvarez Zarikian, Carlos A. |
author_sort |
Pierre, Catherine |
title |
Carbonate diagenesis in the methane-rich sediments of the Beringian margin, IODP 323 Expedition |
title_short |
Carbonate diagenesis in the methane-rich sediments of the Beringian margin, IODP 323 Expedition |
title_full |
Carbonate diagenesis in the methane-rich sediments of the Beringian margin, IODP 323 Expedition |
title_fullStr |
Carbonate diagenesis in the methane-rich sediments of the Beringian margin, IODP 323 Expedition |
title_full_unstemmed |
Carbonate diagenesis in the methane-rich sediments of the Beringian margin, IODP 323 Expedition |
title_sort |
carbonate diagenesis in the methane-rich sediments of the beringian margin, iodp 323 expedition |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/hal-00908630 |
op_coverage |
San Francisco, United States |
long_lat |
ENVELOPE(164.083,164.083,-85.000,-85.000) ENVELOPE(-170.250,-170.250,54.250,54.250) |
geographic |
Bering Sea Bowers Umnak Plateau |
geographic_facet |
Bering Sea Bowers Umnak Plateau |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société American Geophysical Union, Fall Meeting 2010 American Geophysical Union, Fall Meeting 2010, Dec 2010, San Francisco, United States. pp.08 |
op_relation |
hal-00908630 BIBCODE: 2010AGUFM.B34A.08P 10670/1.duwo7e https://hal.archives-ouvertes.fr/hal-00908630 |
op_rights |
undefined |
_version_ |
1766377863787839488 |
spelling |
fttriple:oai:gotriple.eu:10670/1.duwo7e 2023-05-15T15:43:40+02:00 Carbonate diagenesis in the methane-rich sediments of the Beringian margin, IODP 323 Expedition Pierre, Catherine Blanc-Valleron, Marie-Madeleine März, Christian Ravelo, Ana Christina Takahashi, Kozo Alvarez Zarikian, Carlos A. Paléoclimats, proxies, processus (PALEOPROXUS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris) 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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) San Francisco, United States 2010-12-13 https://hal.archives-ouvertes.fr/hal-00908630 en eng HAL CCSD hal-00908630 BIBCODE: 2010AGUFM.B34A.08P 10670/1.duwo7e https://hal.archives-ouvertes.fr/hal-00908630 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société American Geophysical Union, Fall Meeting 2010 American Geophysical Union, Fall Meeting 2010, Dec 2010, San Francisco, United States. pp.08 [1041] GEOCHEMISTRY [0463] BIOGEOSCIENCES [0454] BIOGEOSCIENCES Microbe/mineral interactions Isotopic composition and chemistry Oxidation/reduction reactions [0471] BIOGEOSCIENCES Stable isotope geochemistry geo envir Conference Output https://vocabularies.coar-repositories.org/resource_types/c_c94f/ 2010 fttriple 2023-01-22T17:55:56Z International audience During IODP expedition 323 in the Bering Sea (July 5- September 4, 2009) a series of drilling (down to 750 meters below sea floor) was realized at 7 sites localized on the Umnak plateau (U1339), on the Bowers Ridge (U1340, U1341, U1342) and on the Beringian margin (U1343, U1344, U1345) the oldest sediments dated at 5 Myrs were recovered at Sites U1340 and U1341. Diagenetic carbonates are present at all Sites either as nodules and cm to dm thick layers, or as isolated acicular crystals, within the diatom-rich oozes of the Bering Sea, which are also characterized by their extreme richness in methane. The mineralogical, geochemical and isotopic study of diagenetic carbonates from Sites U1343, U1344 and U1345 was realized to characterize the nature of inorganic and microbial processes responsible for this diagenesis, and to determine the composition and origin of fluids in which these carbonates were precipitated. The carbonate mineralogy is very complex it is represented by composite mixtures of magnesian calcite and dolomite of various composition. Fe-rich dolomite/siderite dominate below ~260 mbsf at Site U1343 and ~200 mbsf at Site U1344. The isotopic compositions of the diagenetic carbonates display wide ranges of variations both for calcite (+2.84 < δ18O ‰ < +6.92 -20.52 < δ13C ‰ <+4.83) and dolomite (+3.58< δ18O ‰ < +9.19; +1.28 < δ13C ‰ <+11.37). The δ13C values clearly indicate that methanogenesis was involved in the sediments during microbial fermentation of organic matter : in this reaction, the 13C-rich CO2 was converted to carbonate alkalinity via silicate weathering and the 13C-poor methane was oxidized as bicarbonate via anaerobic oxidation of methane coupled with bacterial sulfate reduction as it is shown by the association of pyrite with the diagenetic carbonates. Other/Unknown Material Bering Sea Unknown Bering Sea Bowers ENVELOPE(164.083,164.083,-85.000,-85.000) Umnak Plateau ENVELOPE(-170.250,-170.250,54.250,54.250) |