*Baasansuren Gankhurel¹、Keisuke Fukushi²、Akitoshi Akehi¹、Yoshio Takahashi³、Kazuo Kawasaki⁴ (1.Graduate School of Natural Science and Technology, Kanazawa University、2.Instutute of Nature and Environmental Technology, Kanazawa University、3.Department of Earth and Planetary Science, The University of Tokyo、4.Graduate School of Science and Engineering for Research, Toyama University)