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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Language: | English |
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HAL CCSD
2010
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Online Access: | https://hal.science/hal-00908630 |
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openpolar |
institution |
Open Polar |
collection |
École Polytechnique, Université Paris-Saclay: HAL |
op_collection_id |
ftepunivpsaclay |
language |
English |
topic |
[0471] BIOGEOSCIENCES Oxidation/reduction reactions Isotopic composition and chemistry Stable isotope geochemistry [1041] GEOCHEMISTRY [0454] BIOGEOSCIENCES [0463] BIOGEOSCIENCES Microbe/mineral interactions [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[0471] BIOGEOSCIENCES Oxidation/reduction reactions Isotopic composition and chemistry Stable isotope geochemistry [1041] GEOCHEMISTRY [0454] BIOGEOSCIENCES [0463] BIOGEOSCIENCES Microbe/mineral interactions [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes 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 |
[0471] BIOGEOSCIENCES Oxidation/reduction reactions Isotopic composition and chemistry Stable isotope geochemistry [1041] GEOCHEMISTRY [0454] BIOGEOSCIENCES [0463] BIOGEOSCIENCES Microbe/mineral interactions [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
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 < δ 18 O ‰ < +6.92 -20.52 < δ 13 C ‰ <+4.83) and dolomite (+3.58< δ 18 O ‰ < +9.19; +1.28 < δ 13 C ‰ <+11.37). The δ 13 C values clearly indicate that methanogenesis was involved in the sediments during microbial fermentation of organic matter : in this reaction, the 13 C-rich CO 2 was converted to carbonate alkalinity via silicate weathering and the 13 C-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) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-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-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)-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)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-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 |
Conference Object |
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.science/hal-00908630 |
op_coverage |
San Francisco, United States |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
American Geophysical Union, Fall Meeting 2010 https://hal.science/hal-00908630 American Geophysical Union, Fall Meeting 2010, Dec 2010, San Francisco, United States. pp.08 |
op_relation |
hal-00908630 https://hal.science/hal-00908630 BIBCODE: 2010AGUFM.B34A.08P |
_version_ |
1799477804225527808 |
spelling |
ftepunivpsaclay:oai:HAL:hal-00908630v1 2024-05-19T07:38:21+00:00 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) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-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-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)-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)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-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.science/hal-00908630 en eng HAL CCSD hal-00908630 https://hal.science/hal-00908630 BIBCODE: 2010AGUFM.B34A.08P American Geophysical Union, Fall Meeting 2010 https://hal.science/hal-00908630 American Geophysical Union, Fall Meeting 2010, Dec 2010, San Francisco, United States. pp.08 [0471] BIOGEOSCIENCES Oxidation/reduction reactions Isotopic composition and chemistry Stable isotope geochemistry [1041] GEOCHEMISTRY [0454] BIOGEOSCIENCES [0463] BIOGEOSCIENCES Microbe/mineral interactions [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/conferenceObject Conference papers 2010 ftepunivpsaclay 2024-04-25T00:26:25Z 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 < δ 18 O ‰ < +6.92 -20.52 < δ 13 C ‰ <+4.83) and dolomite (+3.58< δ 18 O ‰ < +9.19; +1.28 < δ 13 C ‰ <+11.37). The δ 13 C values clearly indicate that methanogenesis was involved in the sediments during microbial fermentation of organic matter : in this reaction, the 13 C-rich CO 2 was converted to carbonate alkalinity via silicate weathering and the 13 C-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. Conference Object Bering Sea École Polytechnique, Université Paris-Saclay: HAL |