Pre-eruption magmatic processes and magma plumbing system at Hachijo-Nishiyama volcano, Izu–Bonin arc, Japan

Nishiyama volcano on Hachijojima Island is an active basaltic volcano located in the Izu–Bonin arc. In this study, petrological and geochemical analyses were conducted on mafic lavas and pyroclastics to understand the magma plumbing system and pre-eruption magmatic processes. Whole-rock major elemen...

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Veröffentlicht in:Earth, planets, and space planets, and space, 2023-01, Vol.75 (1), p.6-19, Article 6
Hauptverfasser: Oiwa, Kazuki, Kuritani, Takeshi, Nakagawa, Mitsuhiro, Yoshimura, Shumpei
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Sprache:eng
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Zusammenfassung:Nishiyama volcano on Hachijojima Island is an active basaltic volcano located in the Izu–Bonin arc. In this study, petrological and geochemical analyses were conducted on mafic lavas and pyroclastics to understand the magma plumbing system and pre-eruption magmatic processes. Whole-rock major element compositions show significant variations (49.4–54.9 wt.% SiO 2 ), and the samples contain variable amounts of plagioclase phenocrysts (1–40 vol.%). The whole-rock Sr, Nd, and Pb isotopic compositions of samples from the youngest volcanic stage (
ISSN:1880-5981
1343-8832
1880-5981
DOI:10.1186/s40623-022-01761-9