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

Autor: Kazuki Oiwa, Takeshi Kuritani, Mitsuhiro Nakagawa, Shumpei Yoshimura
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Earth, Planets and Space, Vol 75, Iss 1, Pp 1-19 (2023)
Druh dokumentu: article
ISSN: 1880-5981
DOI: 10.1186/s40623-022-01761-9
Popis: Abstract 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.% SiO2), 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 (
Databáze: Directory of Open Access Journals
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