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

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

Sep 15 - Sep 19, 2021Online
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)

Sep 15 - Sep 19, 2021Online

[R3-11]Back-transformation kinetics in high-pressure minerals

*Tomoaki Kubo1, Ko Kamura1, Masahiro Imamura1, Yoshinori Tange2, Yuji Higo2, Masaaki Miyahara3(1. Kyushu Univ., 2. JASRI, 3. Hiroshima Univ.)

Keywords:

high-pressure mineral,back-transformation,kinetics,shocked meteorite,diamond inclusion

High-pressure minerals stable at deep mantle pressures have been naturally found on Earth such as shocked meteorites and diamond inclusions, which provides important constraints on processes of planetary collisions and deep mantle dynamics. Because the timescales are limited in these dynamic processes, the reactions often remain incomplete and/or metastable state. Additionally, backward reactions to the low-pressure phases possibly occur. Here we present some experimental results on kinetics of the back-transformation.