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Evidence of metasomatism in the interior of Vesta

Author

Listed:
  • Ai-Cheng Zhang

    (Nanjing University
    CAS Center for Excellence in Comparative Planetology)

  • Noriyuki Kawasaki

    (Hokkaido University)

  • Huiming Bao

    (Louisiana State University
    Nanjing University
    Nanjing University)

  • Jia Liu

    (CAS Center for Excellence in Comparative Planetology
    University of Science and Technology of China)

  • Liping Qin

    (CAS Center for Excellence in Comparative Planetology
    University of Science and Technology of China)

  • Minami Kuroda

    (Hokkaido University)

  • Jian-Feng Gao

    (Chinese Academy of Sciences)

  • Li-Hui Chen

    (Nanjing University
    CAS Center for Excellence in Comparative Planetology)

  • Ye He

    (Nanjing University)

  • Naoya Sakamoto

    (Hokkaido University)

  • Hisayoshi Yurimoto

    (Hokkaido University
    Hokkaido University
    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)

Abstract

Diogenites are a group of meteorites that are derived from the interior of the largest protoplanet Vesta. They provide a unique opportunity to understanding together the internal structure and dynamic evolution of this protoplanet. Northwest Africa (NWA) 8321 was suggested to be an unbrecciated noritic diogenite meteorite, which is confirmed by our oxygen and chromium isotopic data. Here, we find that olivine in this sample has been partly replaced by orthopyroxene, troilite, and minor metal. The replacement texture of olivine is unambiguous evidence of sulfur-involved metasomatism in the interior of Vesta. The presence of such replacement texture suggests that in NWA 8321, the olivine should be of xenolith origin while the noritic diogenite was derived from partial melting of pre-existing rocks and had crystallized in the interior of Vesta. The post-Rheasilvia craters in the north-polar region on Vesta could be the potential source for NWA 8321.

Suggested Citation

  • Ai-Cheng Zhang & Noriyuki Kawasaki & Huiming Bao & Jia Liu & Liping Qin & Minami Kuroda & Jian-Feng Gao & Li-Hui Chen & Ye He & Naoya Sakamoto & Hisayoshi Yurimoto, 2020. "Evidence of metasomatism in the interior of Vesta," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15049-7
    DOI: 10.1038/s41467-020-15049-7
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