Low Temperature Serpentinite Replacement by Carbonates during Seawater Influx in the Newfoundland Margin
International audience Serpentinite replacement by carbonates in the seafloor is one of the main carbonation processes in nature providing insights into the mechanisms of CO2 sequestration; however, the onset of this process and the conditions for the reaction to occur are not yet fully understood....
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Online Access: | https://hal.science/hal-02504014 https://hal.science/hal-02504014/document https://hal.science/hal-02504014/file/Picazo_et_al_2020_Minerals.pdf https://doi.org/10.3390/min10020184 |
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ftunivsavoie:oai:HAL:hal-02504014v1 2024-04-21T08:07:10+00:00 Low Temperature Serpentinite Replacement by Carbonates during Seawater Influx in the Newfoundland Margin Picazo, Suzanne Malvoisin, Benjamin Baumgartner, Lukas P. Bouvier, Anne-Sophie Université de Lausanne = University of Lausanne (UNIL) Institut des Sciences de la Terre (ISTerre) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) 2020 https://hal.science/hal-02504014 https://hal.science/hal-02504014/document https://hal.science/hal-02504014/file/Picazo_et_al_2020_Minerals.pdf https://doi.org/10.3390/min10020184 en eng HAL CCSD MDPI info:eu-repo/semantics/altIdentifier/doi/10.3390/min10020184 hal-02504014 https://hal.science/hal-02504014 https://hal.science/hal-02504014/document https://hal.science/hal-02504014/file/Picazo_et_al_2020_Minerals.pdf doi:10.3390/min10020184 info:eu-repo/semantics/OpenAccess ISSN: 2075-163X Minerals https://hal.science/hal-02504014 Minerals, 2020, 10 (2), pp.184. ⟨10.3390/min10020184⟩ carbonation CO 2 sequestration replacement process low temperature carbonate precipitation Secondary Ion Mass Spectrometer seawater influx hydrothermal circulation ophicalcite [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy info:eu-repo/semantics/article Journal articles 2020 ftunivsavoie https://doi.org/10.3390/min10020184 2024-04-11T00:43:53Z International audience Serpentinite replacement by carbonates in the seafloor is one of the main carbonation processes in nature providing insights into the mechanisms of CO2 sequestration; however, the onset of this process and the conditions for the reaction to occur are not yet fully understood. Preserved serpentine rim with pseudomorphs of carbonate after serpentine and lobate-shaped carbonate grains are key structural features for replacement of serpentinite by carbonates. Cathodoluminescence microscopy reveals that Ca-rich carbonate precipitation in serpentinite is associated with a sequential assimilation of Mn. Homogeneous δ18O values at the µm-scale within grains and host sample indicate low formation temperature (<20 °C) from carbonation initiation, with a high fluid to rock ratio. δ13C (1–3 ± 1‰) sit within the measured values for hydrothermal systems (−3–3‰), with no systematic correlation with the Mn content. δ13C values reflect the inorganic carbon dominance and the seawater source of CO2 for carbonate. Thermodynamic modeling of fluid/rock interaction during seawater transport in serpentine predicts Ca-rich carbonate production, at the expense of serpentine, only at temperatures below 50 °C during seawater influx. Mg-rich carbonates can also be produced when using a model of fluid discharge, but at significantly higher temperatures (150 °C). This has major implications for the setting of carbonation in present-day and in fossil margins. Article in Journal/Newspaper Newfoundland Université Savoie Mont Blanc: HAL Minerals 10 2 184 |
institution |
Open Polar |
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Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
carbonation CO 2 sequestration replacement process low temperature carbonate precipitation Secondary Ion Mass Spectrometer seawater influx hydrothermal circulation ophicalcite [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy |
spellingShingle |
carbonation CO 2 sequestration replacement process low temperature carbonate precipitation Secondary Ion Mass Spectrometer seawater influx hydrothermal circulation ophicalcite [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy Picazo, Suzanne Malvoisin, Benjamin Baumgartner, Lukas P. Bouvier, Anne-Sophie Low Temperature Serpentinite Replacement by Carbonates during Seawater Influx in the Newfoundland Margin |
topic_facet |
carbonation CO 2 sequestration replacement process low temperature carbonate precipitation Secondary Ion Mass Spectrometer seawater influx hydrothermal circulation ophicalcite [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy |
description |
International audience Serpentinite replacement by carbonates in the seafloor is one of the main carbonation processes in nature providing insights into the mechanisms of CO2 sequestration; however, the onset of this process and the conditions for the reaction to occur are not yet fully understood. Preserved serpentine rim with pseudomorphs of carbonate after serpentine and lobate-shaped carbonate grains are key structural features for replacement of serpentinite by carbonates. Cathodoluminescence microscopy reveals that Ca-rich carbonate precipitation in serpentinite is associated with a sequential assimilation of Mn. Homogeneous δ18O values at the µm-scale within grains and host sample indicate low formation temperature (<20 °C) from carbonation initiation, with a high fluid to rock ratio. δ13C (1–3 ± 1‰) sit within the measured values for hydrothermal systems (−3–3‰), with no systematic correlation with the Mn content. δ13C values reflect the inorganic carbon dominance and the seawater source of CO2 for carbonate. Thermodynamic modeling of fluid/rock interaction during seawater transport in serpentine predicts Ca-rich carbonate production, at the expense of serpentine, only at temperatures below 50 °C during seawater influx. Mg-rich carbonates can also be produced when using a model of fluid discharge, but at significantly higher temperatures (150 °C). This has major implications for the setting of carbonation in present-day and in fossil margins. |
author2 |
Université de Lausanne = University of Lausanne (UNIL) Institut des Sciences de la Terre (ISTerre) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Picazo, Suzanne Malvoisin, Benjamin Baumgartner, Lukas P. Bouvier, Anne-Sophie |
author_facet |
Picazo, Suzanne Malvoisin, Benjamin Baumgartner, Lukas P. Bouvier, Anne-Sophie |
author_sort |
Picazo, Suzanne |
title |
Low Temperature Serpentinite Replacement by Carbonates during Seawater Influx in the Newfoundland Margin |
title_short |
Low Temperature Serpentinite Replacement by Carbonates during Seawater Influx in the Newfoundland Margin |
title_full |
Low Temperature Serpentinite Replacement by Carbonates during Seawater Influx in the Newfoundland Margin |
title_fullStr |
Low Temperature Serpentinite Replacement by Carbonates during Seawater Influx in the Newfoundland Margin |
title_full_unstemmed |
Low Temperature Serpentinite Replacement by Carbonates during Seawater Influx in the Newfoundland Margin |
title_sort |
low temperature serpentinite replacement by carbonates during seawater influx in the newfoundland margin |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02504014 https://hal.science/hal-02504014/document https://hal.science/hal-02504014/file/Picazo_et_al_2020_Minerals.pdf https://doi.org/10.3390/min10020184 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
ISSN: 2075-163X Minerals https://hal.science/hal-02504014 Minerals, 2020, 10 (2), pp.184. ⟨10.3390/min10020184⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3390/min10020184 hal-02504014 https://hal.science/hal-02504014 https://hal.science/hal-02504014/document https://hal.science/hal-02504014/file/Picazo_et_al_2020_Minerals.pdf doi:10.3390/min10020184 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3390/min10020184 |
container_title |
Minerals |
container_volume |
10 |
container_issue |
2 |
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184 |
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1796946829046185984 |