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An early geodynamo driven by exsolution of mantle components from Earth’s core

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  • James Badro

    (Institut de Physique du Globe de Paris, Université Sorbonne Paris Cité
    Earth and Planetary Science Laboratory, École Polytechnique Fédérale de Lausanne)

  • Julien Siebert

    (Institut de Physique du Globe de Paris, Université Sorbonne Paris Cité)

  • Francis Nimmo

    (University of California Santa Cruz)

Abstract

Experiments show that magnesium oxide can dissolve in core-forming metallic melts at very high temperatures; core formation models suggest that a giant impact during Earth’s accretion could have contributed large amounts of magnesium to the early core, the subsequent exsolution of which would have generated enough gravitational energy to power an early geodynamo and produce an ancient magnetic field.

Suggested Citation

  • James Badro & Julien Siebert & Francis Nimmo, 2016. "An early geodynamo driven by exsolution of mantle components from Earth’s core," Nature, Nature, vol. 536(7616), pages 326-328, August.
    • Handle: RePEc:nat:nature:v:536:y:2016:i:7616:d:10.1038_nature18594
    DOI: 10.1038/nature18594
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    Cited by:

    1. Zhi Li & Kuangdai Leng & Jennifer Jenkins & Sanne Cottaar, 2022. "Kilometer-scale structure on the core–mantle boundary near Hawaii," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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