CIコンドライトYamato-980115中普通コンドライト様ゼノリスの起源と進化

松下 隼之介; 中嶋 大輔

doi:10.14862/geochemproc.72.0_132

Abstracts of Annual Meeting of the Geochemical Society of Japan

DOI https://doi.org/10.14862/geochemproc.72.0_132

Conference information

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

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

Number : 72

Date : September 07, 2025 - September 19, 2025

An ordinary chondrite-like xenolith in a CI chondrite: its origin and evolution

*Matsushita Shunnosuke, Nakashima Daisuke

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Keywords: CI chondrites, CY chondrites, Xenolith, Ordinary chondrites, Shock metamorphism

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 132-

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Abstract

For the first time in CI chondrites, the presence of a xenolith was confirmed in Yamato-980115. Based on mineralogical and chemical analyses, it is classified as an L/LL-type ordinary chondrite, having undergone type 4 parent body heating followed by shock re-heating at stage 3 to 5, with peak temperatures around 1000 degrees C. This finding supports the possibility that multiple collisions of non-carbonaceous asteroids triggered reheating of the CI parent body.

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