{
  "abstract": ">Xenon isotopes provide unique constraints on mantle evolution but remain rarely investigated in oceanic intraplate lavas due to pervasive atmospheric contamination. The 2018-2021 Fani Maoré eruption (Mayotte) produced gas-rich lavas, allowing the first investigation of xenon in the Comoros. While helium, neon, and argon systematics are MORB-like, consistent with derivation from a depleted upper mantle, xenon displays a distinct behaviour: the Fani Maoré mantle 129 Xe/ 130 Xe is below 7.1, potentially consistent with a mantle plume contribution. Deconvolution of fissiogenic Xe isotopic signatures, however, reveals (1) substantial contribution from recycled air, and (2) nearly pure 238 U spontaneous fission pattern (Xe Pu /Xe U ∼ 0), arguing against derivation from a deep primordial plume reservoir. Instead, it supports a shallow origin, perhaps involving ancient, U-rich, strongly degassed recycled lithologies that have pervasively metasomatised the Comorian lithosphere. The low 129 Xe/ 130 Xe of the Comoros mantle may reflect a higher contribution of a recycled atmospheric component in the local mantle. Together, this points toward a shallow origin for the archipelago and shows that recycled volatiles in the upper mantle are spatially variable and not fully homogenised.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "R. Sauvalle"
    },
    {
      "name": "M. Moreira"
    },
    {
      "name": "B. Scaillet"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4f8y1jt8qkxhv.bib",
  "cited_by": 0,
  "doi": "10.7185/geochemlet.2639",
  "fulltext_url": null,
  "id": "4f8y1jt8qkxhv",
  "issns": [
    "2410-339X",
    "2410-3403"
  ],
  "landing_url": "https://hal.science/hal-05839406v1",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.sdu"
    ],
    [
      "openalex",
      "1908|Geological and Geochemical Analysis"
    ]
  ],
  "openalex": "W7223329249",
  "pdf_url": "https://hal.science/hal-05839406/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": "European Assoication of Geochemistry",
  "ris": "https://research.draconitic.com/paper/4f8y1jt8qkxhv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:01Z",
      "native_id": "hal-05839406",
      "source": "hal",
      "url": "https://hal.science/hal-05839406v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "openalex:1908|Geological and Geochemical Analysis",
      "subfield": "geophysics"
    }
  ],
  "title": "Xenon isotopes in the Fani Maoré lavas: Implications for upper mantle heterogeneity",
  "title_text": "Xenon isotopes in the Fani Maoré lavas: Implications for upper mantle heterogeneity",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:01Z",
  "url": "https://research.draconitic.com/paper/4f8y1jt8qkxhv",
  "venue": "Geochemical Perspectives Letters",
  "versions": []
}