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Ca-, Al-rich refractory inclusions and Pt-metal nuggets in the Ningqiang carbonaceous chondrite

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Chinese Science Bulletin

Abstract

Petrography and mineral chemistry of Ca, Al-rich inclusions of Ningqiang carbonaceous chondrite are studied and the highly Re-Os fractionated Pt-metal nuggets in it is discovered. The refractory inclusions are classified into melilite-spinel-rich, and spinel-pyroxene-rich types. The former probably crystallized from melts, while the latter could be aggregates of the nebular condensates. The strong fractionation between Re and Os suggests a pro-solar origin of the Pt-metal nuggets, which probably experienced various processes of formation and evolution before being captured by the refractory inclusions as indicated by the depletions of W and Mo.

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Authors and Affiliations

  1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640, Guangzhou, China

    Yangting Lin

  2. Max-Planck-Institut für Kernphysik, 6 900, Heidelberg 1, Germany

    A. El Goresy

  3. Guiyang institute of Geochemistry, Chinese Academy of Sciences, 550002, Guiyang, China

    Ziyuan Ouyang

Authors
  1. Yangting Lin
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  2. A. El Goresy
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  3. Ziyuan Ouyang
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Lin, Y., El Goresy, A. & Ouyang, Z. Ca-, Al-rich refractory inclusions and Pt-metal nuggets in the Ningqiang carbonaceous chondrite. Chin.Sci.Bull. 44, 725–731 (1999). https://doi.org/10.1007/BF02909713

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  • DOI: https://doi.org/10.1007/BF02909713

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