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Origin of Na/K diversity of basaltic magmas from Rishiri Volcano

By comparing the magma generation conditions of high-Na/K and low-Na/K basaltic lavas from Rishiri Volcano, we find that the primary magma of the high-Na/K basalt was formed by the influx melting of aqueous fluid separated from the supercritical liquid, while the low-Na/K basalt was generated by supercritical liquid-fluxed melting. These findings show that elemental partitioning during the separation of supercritical liquid can induce chemical diversity within the primary basaltic magmas.

[Chairperson]<br />Atsushi Kamei: R6-01 - R6-04<br />Masao Ban, Tatsuhiko Kawamoto: R6-06 -  R6-08<br />Tatsuhiko Kawamoto: R6-09 - R6-10

日本鉱物科学会年会

2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

[R6-01]Origin of Na/K diversity of basaltic magmas from Rishiri Volcano

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