プチスポット玄武岩の揮発性成分・微量元素組成から見る北西太平洋プレート下のマントル不均質

佐野 真; 平野 直人; 奥村 聡; 秋澤 紀克; 田村 明弘; 森下 知晃

doi:10.14862/geochemproc.71.0_263

Abstracts of Annual Meeting of the Geochemical Society of Japan

DOI https://doi.org/10.14862/geochemproc.71.0_263

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 : 71

Date : September 18, 2024 - September 20, 2024

Mantle heterogeneity beneath the NW Pacific Plate investigated using volatile and trace element compositions of petit-spot basalts

*Sano Makoto, Hirano Naoto, Okumura Satoshi, Akizawa Norikatsu, Tamura Akihiro, Morishita Tomoaki

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Keywords: petits-spot, alkali basalt, upper mantle, mantle heterogeneity

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 263-

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Abstract

Petit-spot volcanism provide information on the asthenosphere beneath an old plate. Here, this study reports the volatile, major, and trace element compositions of quenched glass of petit-spot basalts and identify the chemical composition of upper mantle beneath the NW Pacific plate, where some enriched materials are recognized in spite of asthenosphere.

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