{
  "abstract": "About 80% of Earth volcanic activity occurs underwater, releasing deep carbon to submarine environments and impacting Earth’s climate over geological timescales. The CO 2 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 CO 2 hydrates field at the seafloor offshore Mayotte Island (Indian Ocean) associated with liquid CO 2 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 CO 2 , with minor contributions of CH 4 and H 2 , with noble gas ratios and stable and radio-carbon isotopes clearly demonstrating their magmatic origin. Estimates of the CO 2 emitted over the entire area represent about 0.5% of the global magmatic carbon flux. Our discovery also suggests that CO 2 hydrates may potentially be stable at the seafloor at the right pressure-temperature conditions, bringing new prospects into CO 2 sequestration and decarbonization pathways in the ocean, in particular regarding kinetics of hydrates dissolution and environmental impacts.",
  "abstract_shown": true,
  "affiliations": [
    "Geo-Ocean, Unité Mixte de Recherche 6538 CNRS, Ifremer, UBO, UBS, Plouzané, France",
    "LSCE/IPSL, CEA-CNRS-UVSQ, UMR 8212, CEA-Orme des Merisiers, Gif-sur-Yvette, France",
    "Laboratoire de Mesure du Carbone 14 (LMC14), LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France",
    "PMEL/NOAA, Seattle, WA, USA",
    "GET, UMR 5563 CNRS, UR 234 IRD, UM 97 UPS, CNES, Observatoire Midi-Pyrénées, Toulouse, France",
    "Dipartimento di Scienze dell’Ambiente e della Terra, Università degli Studi di Milano-Bicocca, Milan, Italy",
    "INGV Istituto Nazionale di Geofisica e Vulcanologia (INGV), Milan, Italy",
    "LDCM, IFREMER, Plouzané, France",
    "Université Brest, Ifremer, BEEP, Plouzané, France",
    "Université Paris Cité, Institut de Physique du Globe de Paris, CNRS, Paris, France"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 27,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Cécile Cathalot",
      "orcid": "0000-0002-0868-7201"
    },
    {
      "affs": [
        0
      ],
      "name": "Emmanuel Rinnert",
      "orcid": "0000-0003-1524-5505"
    },
    {
      "affs": [
        0
      ],
      "name": "Carla Scalabrin",
      "orcid": "0000-0001-9276-980X"
    },
    {
      "affs": [
        0
      ],
      "name": "Olivia Fandiño",
      "orcid": "0000-0002-4043-9937"
    },
    {
      "affs": [
        0
      ],
      "name": "Thomas Giunta",
      "orcid": "0000-0001-8633-0956"
    },
    {
      "affs": [
        0
      ],
      "name": "Hélène Ondréas"
    },
    {
      "affs": [
        0
      ],
      "name": "Olivier J. Rouxel",
      "orcid": "0000-0002-1431-222X"
    },
    {
      "affs": [
        1
      ],
      "name": "Christophe Rabouille",
      "orcid": "0000-0003-1211-717X"
    },
    {
      "affs": [
        2
      ],
      "name": "Jean‐Pascal Dumoulin",
      "orcid": "0000-0002-9377-0148"
    },
    {
      "affs": [
        1
      ],
      "name": "Bruno Bombled"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Marine Manoux",
      "orcid": "0009-0004-3605-3259"
    },
    {
      "affs": [
        3
      ],
      "name": "Sharon L. Walker",
      "orcid": "0000-0002-8135-6791"
    },
    {
      "affs": [
        4
      ],
      "name": "Valérie Chavagnac",
      "orcid": "0000-0002-7535-6568"
    },
    {
      "affs": [
        5,
        6
      ],
      "name": "Andrea Luca Rizzo",
      "orcid": "0000-0003-2225-3781"
    },
    {
      "affs": [
        7
      ],
      "name": "Morgan Tardivel",
      "orcid": "0000-0002-9591-2138"
    },
    {
      "affs": [
        7
      ],
      "name": "Énora Prado",
      "orcid": "0000-0002-9773-3459"
    },
    {
      "affs": [
        0
      ],
      "name": "Manon Mastin",
      "orcid": "0000-0002-7600-218X"
    },
    {
      "affs": [
        0
      ],
      "name": "Jean‐Pierre Donval",
      "orcid": "0000-0002-5026-5846"
    },
    {
      "affs": [
        0
      ],
      "name": "Vivien Guyader",
      "orcid": "0000-0001-7296-1335"
    },
    {
      "affs": [
        0
      ],
      "name": "Anne‐Sophie Alix"
    },
    {
      "affs": [
        8
      ],
      "name": "G. Page"
    },
    {
      "affs": [
        8
      ],
      "name": "Marjolaine Matabos",
      "orcid": "0000-0003-1983-9896"
    },
    {
      "affs": [
        9
      ],
      "name": "Valentine Puzenat",
      "orcid": "0000-0002-6498-0832"
    },
    {
      "affs": [
        9
      ],
      "name": "Nathalie Feuillet",
      "orcid": "0000-0001-6497-817X"
    },
    {
      "name": "on behalf of the GEOFLAMME scientific cruise party"
    },
    {
      "affs": [
        9
      ],
      "name": "Valentine Puzenat",
      "orcid": "0000-0002-6498-0832"
    },
    {
      "affs": [
        9
      ],
      "name": "N. Feuillet"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0qa0c2bfmzdfj.bib",
  "cited_by": 6,
  "doi": "10.1038/s41561-026-02004-2",
  "fulltext_url": null,
  "id": "0qa0c2bfmzdfj",
  "issns": [
    "1752-0894",
    "1752-0908"
  ],
  "landing_url": "https://doi.org/10.1038/s41561-026-02004-2",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2304|Methane Hydrates and Related Phenomena"
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  "openalex": "W7164542701",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-12",
  "publisher": "Nature Portfolio",
  "ris": "https://research.draconitic.com/paper/0qa0c2bfmzdfj.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T13:21:03Z",
      "native_id": "W7164542701",
      "source": "openalex",
      "url": "https://doi.org/10.1038/s41561-026-02004-2"
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  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2304|Methane Hydrates and Related Phenomena",
      "subfield": "environmental"
    }
  ],
  "title": "Large CO2 seeps and hydrate field on the seafloor offshore Mayotte Island",
  "title_text": "Large CO2 seeps and hydrate field on the seafloor offshore Mayotte Island",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T13:21:21Z",
  "url": "https://research.draconitic.com/paper/0qa0c2bfmzdfj",
  "venue": "Nature Geoscience",
  "versions": []
}