*小澤 信1、宮原 正明2、大谷 栄治1、伊藤 嘉紀1、鈴木 昭夫1、木村 眞3、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)