Sulfur‐rich mafic magma injection into the felsic magma chamber beneath Asama volcano, central Japan: Records in olivine‐hosted melt inclusions from the Itabana and Tenmei eruptions
Yoshiaki Yamaguchi,
Andreas Auer,
Isoji Miyagi
Abstract:Even though no basalts have erupted at Asama volcano, its large, felsic magma chamber standing beneath the summit is frequently replenished by cryptic injections of mafic magma of basalt‐basaltic andesite composition. This mafic magma is preserved within melt inclusions trapped in olivine phenocrysts collected from the old Itabana pumice of the Kurofu stage and the Tenmei pumice of the current Maekake stage. The trapped mafic melts provide a detailed and vivid record of cryptic mafic magma injection into the f… Show more
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