{
  "abstract": "Neon isotopes are key tracers of Earth's volatile origin, yet their signatures in volcanic glasses may be modified by kinetic fractionation during magmatic degassing. Recent experiments have revealed vesicle-scale variations in 20 Ne/ 22 Ne, highlighting the need for quantitative constraints on the mass dependence of neon diffusion in silicate melts. Here, we use classical molecular dynamics simulations and a pseudo-isotope approach to determine the mass dependence exponent β for neon diffusion in a MORB melt over temperatures of 1473-1873 K and pressures of 0 to 10 kbar. We find a robust linear relationship between log D and log m, with β ≈ 0.24-0.29 at low pressure, significantly lower than the gas kinetic prediction of 0.5, and decreasing approximately linearly with pressure. These results indicate that diffusion-driven fractionation is limited at the melt scale but can generate measurable, transient isotopic enrichments in vesicles under strongly non-equilibrium degassing conditions. Our findings provide a physically grounded framework for interpreting neon isotope signatures in MORB glasses and assessing the preservation of mantle-derived volatile signals.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 2,
  "authors": [
    {
      "name": "J. Nteme"
    },
    {
      "name": "M. Moreira"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cy7dx8y1356w7.bib",
  "cited_by": 0,
  "doi": "10.7185/geochemlet.2630",
  "fulltext_url": null,
  "id": "cy7dx8y1356w7",
  "issns": [
    "2410-339X",
    "2410-3403"
  ],
  "landing_url": "https://insu.hal.science/insu-05772374v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.sdu"
    ],
    [
      "openalex",
      "1908|Geological and Geochemical Analysis"
    ]
  ],
  "openalex": "W7211910943",
  "pdf_url": "https://insu.hal.science/insu-05772374/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": "European Assoication of Geochemistry",
  "ris": "https://research.draconitic.com/paper/cy7dx8y1356w7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:44Z",
      "native_id": "insu-05772374",
      "source": "hal",
      "url": "https://insu.hal.science/insu-05772374v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "openalex:1908|Geological and Geochemical Analysis",
      "subfield": "geophysics"
    }
  ],
  "title": "Diffusional fractionation of neon isotopes in MORB melts: a molecular dynamics study",
  "title_text": "Diffusional fractionation of neon isotopes in MORB melts: a molecular dynamics study",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:44Z",
  "url": "https://research.draconitic.com/paper/cy7dx8y1356w7",
  "venue": "Geochemical Perspectives Letters",
  "versions": []
}