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Immiscible hydrous Fe–Ca–P melt and the origin of iron oxide-apatite ore deposits

Author

Listed:
  • Tong Hou

    (Leibniz Universtät Hannover
    China University of Geosciences)

  • Bernard Charlier

    (University of Liege)

  • François Holtz

    (Leibniz Universtät Hannover)

  • Ilya Veksler

    (GFZ German Research Center for Geosciences
    Perm State University)

  • Zhaochong Zhang

    (China University of Geosciences)

  • Rainer Thomas

    (GFZ German Research Center for Geosciences)

  • Olivier Namur

    (Leibniz Universtät Hannover
    KU Leuven)

Abstract

The origin of iron oxide-apatite deposits is controversial. Silicate liquid immiscibility and separation of an iron-rich melt has been invoked, but Fe–Ca–P-rich and Si-poor melts similar in composition to the ore have never been observed in natural or synthetic magmatic systems. Here we report experiments on intermediate magmas that develop liquid immiscibility at 100 MPa, 1000–1040 °C, and oxygen fugacity conditions (fO2) of ∆FMQ = 0.5–3.3 (FMQ = fayalite-magnetite-quartz equilibrium). Some of the immiscible melts are highly enriched in iron and phosphorous ± calcium, and strongly depleted in silicon (

Suggested Citation

  • Tong Hou & Bernard Charlier & François Holtz & Ilya Veksler & Zhaochong Zhang & Rainer Thomas & Olivier Namur, 2018. "Immiscible hydrous Fe–Ca–P melt and the origin of iron oxide-apatite ore deposits," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03761-4
    DOI: 10.1038/s41467-018-03761-4
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    Cited by:

    1. Tobias Keller & Fernando Tornos & John M. Hanchar & Dorota K. Pietruszka & Arianna Soldati & Donald B. Dingwell & Jenny Suckale, 2022. "Genetic model of the El Laco magnetite-apatite deposits by extrusion of iron-rich melt," Nature Communications, Nature, vol. 13(1), pages 1-14, December.
    2. Dorota K. Pietruszka & John M. Hanchar & Fernando Tornos & Richard Wirth & Nathan A. Graham & Kenneth P. Severin & Francisco Velasco & Matthew Steele-MacInnis & Wyatt M. Bain, 2023. "Magmatic immiscibility and the origin of magnetite-(apatite) iron deposits," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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