Presentation Information
[S1-07]Groundmass crystallization experiments of an andesitic pumiceunder low vapor pressure<font color="#FF7F27">「発表賞エントリー」</font>
*Hiroki Yasukawa1, Mayumi Mujin1, Michihiko Nakamura1, Shizuka Otsuki2 (1. Tohoku Uni. Sci., 2. Nittetu Technology)
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.