*Theeraporn Chuenpee¹, Osamu Nishikawa⁵, Yoshiaki Kon⁴, Kiyotaka Ninagawa³, Shin Toyoda³, Takeyuki Ogata⁵, Takashi Uchida⁵, Isao Takashima² (1.Faculty of Engineering and Resource Science, Akita University, 2.Mining Museum, Akita University, 3.Department of Applied Physics, Okayama University of Science, 4.National Institute of Advanced Industrial Science and Technology, 5.Faculty of International Resource Sciences, Akita University)

*Kenzo Sanematsu¹, Terumi Ejima¹, Yoshiaki Kon¹, Takayuki Manaka² (1.Mineral Resource Research Group, Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 2.Neko Minerals Co., Ltd.)

*Hiroki Uehara¹, Tsuyoshi Komiya², Shinji Yamamoto⁴, Yoshiaki Kon³, Yibing Li⁵, Wei Jin⁶ (1.Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, 2.Department of Earth Science & Astronomy Graduate School of Arts and Sciences, The University of Tokyo, 3.National Institute of Advanced Industrial Science and Technology, 4.Graduate School of Environment and Information Sciences, The Yokohama National University, 5.Institute of Geology, CAGS, 6.Univ. Jilin)

Naoki Sato¹, Shinji Yamamoto², Hiroki Uehara¹, Shuhei Sakata¹, Yoshiaki Kon⁴, Kazuaki Okamoto⁵, Takafumi Hirata³, *Tsuyoshi Komiya¹ (1.Department of Earth Science & Astronomy Graduate School of Arts and Sciences The University of Tokyo, 2.Graduate School of Environment and Information Sciences, Yohohama National University, 3.Graduate School of Science, Kyoto University, 4.National Institute of Advanced Industrial Science and Technology, 5.Faculty of Education, Saitama University)