[S1-07] Groundmass crystallization experiments of an andesitic pumiceunder low vapor pressure | 2019 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

2019 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

Sep 19 - Sep 23, 2019Kyushu University Ito Campus

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2019 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

Sep 19 - Sep 23, 2019Kyushu University Ito Campus

[S1-07]Groundmass crystallization experiments of an andesitic pumiceunder low vapor pressure「発表賞エントリー」

*Hiroki Yasukawa¹, Mayumi Mujin¹, Michihiko Nakamura¹, Shizuka Otsuki²(1. Tohoku Uni. Sci., 2. Nittetu Technology)

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Keywords:

Nanolite,Ultrananolite

In order to investigate the crystallization condition of nanoscale crystals (nanolite and ultrananolite), we performed the dehydration-induced crystallization experiments that simulate shallow conduit conditions. Ultrananolite crystallized at 800°C and LVP, and it took 2 hours to start crystallization. As compared with magnetite, pyroxene nanolite crystallized under wide temperature and pressure conditions. These results may constrain the pressure-temperature-time paths of magma in a shallow conduit.

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