*Satoshi Yoshida^1,2, Hisashi Asanuma³, Tomohiko Sato⁴, Takafumi Hirata⁵, Yusuke Sawaki² (1.Center for Northeast Asian Studies, Tohoku University, 2.Department of Earth Science and Astronomy, The University of Tokyo, 3.Graduate School of Human and Environmental Studies, Kyoto University, 4. Center for Fundamental Education, Okayama University of Science, 5.Geochemical Research Center, The University of Tokyo)

*Tomohiko Sato¹, Kazumasa Aoki¹, Jargalsaikhan Batsukh², Khishigjav Tsogtbaatar² (1.Center for Fundamental Education, Okayama University of Science, 2.Institute of Paleontology, Mongolian Academy of Sciences)