*Shin OZAWA1, Masaaki MIYAHARA2, Eiji OHTANI1, Yoshinori ITO1, Akio SUZUKI1, Makoto KIMURA3, Olga N. Koroleva4, Konstantin Litasov5, Nikolay P. Pokhilenko5
(1.Department of Earth Science, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan, 2.Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University,, 3.Faculty of Science, Ibaraki University, Mito 310-8512, Japan, 4.Institute of Mineralogy, UB RAS, Miass, 456317, Russia, 5.V. S. Sobolev Institute of Geology and Mineralogy, SB RAS, Novosibirsk, 630090, Russia)