2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 15 - Sep 19, 2021Online
2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 15 - Sep 19, 2021Online
[R3-03]Effect of Al on high pressure hydrous minerals stable under mantle transition zone and lower mantle conditions[Presentation award entry]
*Akio Ohta1, Toru Inoue1, Masamichi Noda4, Sho Kakizawa1, Takaaki Kawazoe1, Tomoko Sato1, Toru Shinmei2, Tetsuo Irifune2, Naoya Sakamoto3, Hisayoshi Yurimoto3(1. Hiroshima Univ. Adv. Sci. Eng., 2. Ehime Univ. GRC, 3. Hokkaido Univ. Sci., 4. Hiroshima Univ. Sci.)
Keywords:
hydrous phase,mantle transition zone,coupling substitution,water content,lower mantle
Water is one of the major volatiles present in the Earth's surface layers, and it is continuously supplied to the Earth's interior by subducting slab. Water has a significant effect on the physical properties and melting temperatures of minerals. Al is the abundant element after Mg, Fe, and Si in subducting plate materials, and it has an odd valence (Al3+). Therefore the coupling substitution with H+ can increase the water content in minerals. We conducted an experimental study to clarify the differences in Al substitution patterns in various high pressure hydrous minerals.