分化隕石リン酸塩鉱物のU-Pb年代・希土類元素分析

小池 みずほ; 森田 拓弥; 高畑 直人; 佐野 有司; 飯塚 毅; 三河内 岳

doi:10.14862/geochemproc.64.0_191

Abstracts of Annual Meeting of the Geochemical Society of Japan

DOI https://doi.org/10.14862/geochemproc.64.0_191

Conference information

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

NanoSIMS U-Pb dating & rare earth elements analyses of phosphate in differentiated meteorites

*Mizuho Koike, Takuya Morita, Naoto Takahata, Yuji Sano, Tsuyoshi Iizuka, Takashi Mikouchi

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Keywords: differentiated meteorites, eucrites, phosphate minerals, U-Pb chronology, rare earth elements

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Pages 191-

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Abstract

Some differentiated achondrites, such as eucrites, recorded ancient geochemical /geophysical processes of early asteroids (or planetesimals), including their acquirement of volatiles. Chronological and geochemical information of phosphates in the meteorites is expected as valuable clue. Here, we report the high spatial resolution U-Pb dating and rare earth elements analyses of phosphates in several basaltic eucrites and an anomalous achondrite, Ibitira.

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