Origin of a sapphirine-bearing Al-rich chondrule in the DaG 978 ungrouped chondrite

Zhang Aicheng; 伊藤 正一; 坂本 直哉; 圦本 尚義; Wang Rucheng

doi:10.14862/geochemproc.59.0.269.0

Abstracts of Annual Meeting of the Geochemical Society of Japan

Session ID : 3A07

DOI https://doi.org/10.14862/geochemproc.59.0.269.0

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Host: Abstracts of Annual Meeting of the Geochemical Society of Japan

Origin of a sapphirine-bearing Al-rich chondrule in the DaG 978 ungrouped chondrite

*Zhang Aicheng, Itoh Shoichi, Sakamoto Naoya, Yurimoto Hisayoshi, Wang Rucheng

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Keywords: oxygen, SIMS, Al-rich chondrule, REE

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Abstract

We report mineralogy, oxygen isotopic and rare-earth-element compositions of a sapphirine-bearing Al-rich chondrule (SARC) from the Dar al Gani (DaG) 978 ungrouped carbonaceous chondrite. Our results indicate that the precursor of SARC included Group II CAIs as components. Assimilation of incompletely melted amoeboid olivine aggregate also occurred during formation of the ferromagnesian rim in SARC.

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