Large CO2 seeps and hydrates field in the Indian Ocean (Mayotte Island)
About 80% of Earth volcanic activity occurs underwater, releasing deep carbon to submarine environments and impacting Earth’s climate over geological timescales. The CO2 emitted during submarine eruptions and/or hydrothermal degassing creates local ocean acidification, affecting the seawater carbona...
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Springer Science and Business Media LLC
2024
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ftarchimer:oai:archimer.ifremer.fr:101472 2024-09-15T18:28:12+00:00 Large CO2 seeps and hydrates field in the Indian Ocean (Mayotte Island) Cathalot, Cecile Rinnert, Emmanuel Scalabrin, Carla Fandino, Olivia Giunta, Thomas Ondreas, Helene Rouxel, Olivier Rabouille, Christophe Dumoulin, Jean-pascal Bombled, Bruno Manoux, Marine Walker, Sharon Chavagnac, Valérie Rizzo, Andrea Tardivel, Morgan Prado, Enora Rawke, Maria El Mastin, Manon Donval, Jean-pierre Guyader, Vivien Page, Gabrielle Matabos, Marjolaine Feuillet, Nathalie 2024-08-01 application/pdf https://archimer.ifremer.fr/doc/00903/101472/112279.pdf https://archimer.ifremer.fr/doc/00903/101472/112282.xlsx https://archimer.ifremer.fr/doc/00903/101472/112283.docx https://archimer.ifremer.fr/doc/00903/101472/112284.png https://archimer.ifremer.fr/doc/00903/101472/112285.pdf https://archimer.ifremer.fr/doc/00903/101472/112286.pdf https://archimer.ifremer.fr/doc/00903/101472/112287.pdf https://archimer.ifremer.fr/doc/00903/101472/112288.wmv https://archimer.ifremer.fr/doc/00903/101472/112289.mp4 https://doi.org/10.21203/rs.3.rs-4720763/v1 https://archimer.ifremer.fr/doc/00903/101472/ eng eng Springer Science and Business Media LLC https://archimer.ifremer.fr/doc/00903/101472/112279.pdf https://archimer.ifremer.fr/doc/00903/101472/112282.xlsx https://archimer.ifremer.fr/doc/00903/101472/112283.docx https://archimer.ifremer.fr/doc/00903/101472/112284.png https://archimer.ifremer.fr/doc/00903/101472/112285.pdf https://archimer.ifremer.fr/doc/00903/101472/112286.pdf https://archimer.ifremer.fr/doc/00903/101472/112287.pdf https://archimer.ifremer.fr/doc/00903/101472/112288.wmv https://archimer.ifremer.fr/doc/00903/101472/112289.mp4 doi:10.21203/rs.3.rs-4720763/v1 https://archimer.ifremer.fr/doc/00903/101472/ info:eu-repo/semantics/openAccess restricted use Under Review at Nature Portfolio (Springer Science and Business Media LLC) In Press text Article info:eu-repo/semantics/article 2024 ftarchimer https://doi.org/10.21203/rs.3.rs-4720763/v1 2024-08-06T23:37:45Z About 80% of Earth volcanic activity occurs underwater, releasing deep carbon to submarine environments and impacting Earth’s climate over geological timescales. The CO2 emitted during submarine eruptions and/or hydrothermal degassing creates local ocean acidification, affecting the seawater carbonate equilibrium and oceanic ecosystems at large regional scales. Here, we report for the first time the existence of a major CO2 hydrates field at the seafloor offshore Mayotte Island (Indian Ocean) associated with liquid CO2 venting, following the submarine eruption that occurred in 2018. Using detailed acoustic surveys and in situ Raman spectroscopy, we reveal multiple hydrate mounds and seep zones distributed over an area of 0.06 km². We show that the gas seeps are mainly composed of CO2, with minor contributions of CH4 and H2, with noble gas ratios and stable and radio-carbon isotopes clearly demonstrating their magmatic origin. Estimates of the CO2 emitted over the entire area represent about 0.5% of the global magmatic carbon flux. Our discovery also suggests that CO2 hydrates may potentially be stable at the seafloor at the right pressure-temperature conditions, bringing new prospects into CO2 sequestration and decarbonization pathways in the ocean, in particular regarding kinetics of hydrates dissolution and environmental impacts. Article in Journal/Newspaper Ocean acidification Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
About 80% of Earth volcanic activity occurs underwater, releasing deep carbon to submarine environments and impacting Earth’s climate over geological timescales. The CO2 emitted during submarine eruptions and/or hydrothermal degassing creates local ocean acidification, affecting the seawater carbonate equilibrium and oceanic ecosystems at large regional scales. Here, we report for the first time the existence of a major CO2 hydrates field at the seafloor offshore Mayotte Island (Indian Ocean) associated with liquid CO2 venting, following the submarine eruption that occurred in 2018. Using detailed acoustic surveys and in situ Raman spectroscopy, we reveal multiple hydrate mounds and seep zones distributed over an area of 0.06 km². We show that the gas seeps are mainly composed of CO2, with minor contributions of CH4 and H2, with noble gas ratios and stable and radio-carbon isotopes clearly demonstrating their magmatic origin. Estimates of the CO2 emitted over the entire area represent about 0.5% of the global magmatic carbon flux. Our discovery also suggests that CO2 hydrates may potentially be stable at the seafloor at the right pressure-temperature conditions, bringing new prospects into CO2 sequestration and decarbonization pathways in the ocean, in particular regarding kinetics of hydrates dissolution and environmental impacts. |
format |
Article in Journal/Newspaper |
author |
Cathalot, Cecile Rinnert, Emmanuel Scalabrin, Carla Fandino, Olivia Giunta, Thomas Ondreas, Helene Rouxel, Olivier Rabouille, Christophe Dumoulin, Jean-pascal Bombled, Bruno Manoux, Marine Walker, Sharon Chavagnac, Valérie Rizzo, Andrea Tardivel, Morgan Prado, Enora Rawke, Maria El Mastin, Manon Donval, Jean-pierre Guyader, Vivien Page, Gabrielle Matabos, Marjolaine Feuillet, Nathalie |
spellingShingle |
Cathalot, Cecile Rinnert, Emmanuel Scalabrin, Carla Fandino, Olivia Giunta, Thomas Ondreas, Helene Rouxel, Olivier Rabouille, Christophe Dumoulin, Jean-pascal Bombled, Bruno Manoux, Marine Walker, Sharon Chavagnac, Valérie Rizzo, Andrea Tardivel, Morgan Prado, Enora Rawke, Maria El Mastin, Manon Donval, Jean-pierre Guyader, Vivien Page, Gabrielle Matabos, Marjolaine Feuillet, Nathalie Large CO2 seeps and hydrates field in the Indian Ocean (Mayotte Island) |
author_facet |
Cathalot, Cecile Rinnert, Emmanuel Scalabrin, Carla Fandino, Olivia Giunta, Thomas Ondreas, Helene Rouxel, Olivier Rabouille, Christophe Dumoulin, Jean-pascal Bombled, Bruno Manoux, Marine Walker, Sharon Chavagnac, Valérie Rizzo, Andrea Tardivel, Morgan Prado, Enora Rawke, Maria El Mastin, Manon Donval, Jean-pierre Guyader, Vivien Page, Gabrielle Matabos, Marjolaine Feuillet, Nathalie |
author_sort |
Cathalot, Cecile |
title |
Large CO2 seeps and hydrates field in the Indian Ocean (Mayotte Island) |
title_short |
Large CO2 seeps and hydrates field in the Indian Ocean (Mayotte Island) |
title_full |
Large CO2 seeps and hydrates field in the Indian Ocean (Mayotte Island) |
title_fullStr |
Large CO2 seeps and hydrates field in the Indian Ocean (Mayotte Island) |
title_full_unstemmed |
Large CO2 seeps and hydrates field in the Indian Ocean (Mayotte Island) |
title_sort |
large co2 seeps and hydrates field in the indian ocean (mayotte island) |
publisher |
Springer Science and Business Media LLC |
publishDate |
2024 |
url |
https://archimer.ifremer.fr/doc/00903/101472/112279.pdf https://archimer.ifremer.fr/doc/00903/101472/112282.xlsx https://archimer.ifremer.fr/doc/00903/101472/112283.docx https://archimer.ifremer.fr/doc/00903/101472/112284.png https://archimer.ifremer.fr/doc/00903/101472/112285.pdf https://archimer.ifremer.fr/doc/00903/101472/112286.pdf https://archimer.ifremer.fr/doc/00903/101472/112287.pdf https://archimer.ifremer.fr/doc/00903/101472/112288.wmv https://archimer.ifremer.fr/doc/00903/101472/112289.mp4 https://doi.org/10.21203/rs.3.rs-4720763/v1 https://archimer.ifremer.fr/doc/00903/101472/ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Under Review at Nature Portfolio (Springer Science and Business Media LLC) In Press |
op_relation |
https://archimer.ifremer.fr/doc/00903/101472/112279.pdf https://archimer.ifremer.fr/doc/00903/101472/112282.xlsx https://archimer.ifremer.fr/doc/00903/101472/112283.docx https://archimer.ifremer.fr/doc/00903/101472/112284.png https://archimer.ifremer.fr/doc/00903/101472/112285.pdf https://archimer.ifremer.fr/doc/00903/101472/112286.pdf https://archimer.ifremer.fr/doc/00903/101472/112287.pdf https://archimer.ifremer.fr/doc/00903/101472/112288.wmv https://archimer.ifremer.fr/doc/00903/101472/112289.mp4 doi:10.21203/rs.3.rs-4720763/v1 https://archimer.ifremer.fr/doc/00903/101472/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.21203/rs.3.rs-4720763/v1 |
_version_ |
1810469531686010880 |