*Nakajima Toru¹, Harutaka Sakai¹, Hideki Iwano², Tohru Danhara², Takafumi Hirata³ (1.Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, 2.Kyoto Fission-Track Co., Ltd., 3. Geochemical Research Center, The University of Tokyo)

*Nakajima Toru¹, Harutaka Sakai¹, Hideki Iwano², Tohru Danhara², Takafumi Hirata³ (1.Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, 2.Kyoto Fission-Track Co., Ltd., 3. Geochemical Research Center, The University of Tokyo)

*Futoshi Nanayama^1,5, Toru Yamasaki¹, Jun Tajika², Hideki Iwano³, Tohru Danhara³, Takafumi Hirata⁴ (1.Geological Survey of Japan, AIST, 2.Docon Co. Ltd, 3.Kyoto Fission-Track Co.Ltd, 4.Tokyo Univ., 5.CWMD, Kumamoto Univ.)

*Futoshi Nanayama^1,6, Hiroshi Kurita², Toru Yamasaki¹, Jun Tajika³, Hideki Iwano⁴, Tohru Danhara⁴, Takafumi Hirata⁵ (1.Geological Survey of Japan, AIST, 2.Niigata Univ., 3.Docon Co. Ltd, 4.Kyoto Fission-Track Co. Ltd, 5.Tokyo Univ., 6.CWMD, Kumamoto Univ.)

*Yoshihiro Nakamura¹, Yutaka Takahasi¹, Tohru Danhara², Hideki Iwano², Takehumi Hirata³ (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 2.Kyoto Fission-Track Co., Ltd., 3.Geochemical Research Center, The University of Tokyo)

*Keiichi Kazuratachi¹, Tetsuo Kawakami¹, Etienne Skrzypek¹, Shuhei Sakata², Takafumi Hirata³ (1.Kyoto University, 2.Gakushuin University, 3.The University of Tokyo)

*Keiichi Kazuratachi¹, Tetsuo Kawakami¹, Etienne Skrzypek¹, Shuhei Sakata², Takafumi Hirata³ (1.Kyoto University, 2.Gakushuin University, 3.The University of Tokyo)

*Sota Niki¹, Hirochika Sumino², Masahiro Kobayashi³, Hiroyuki Kagi¹, Takafumi Hirata¹, Chris J. Ballentine⁴ (1.Geochemical Research Center, Grad. School of Science, Univ. of Tokyo, 2.Dept. of Basic Science, Grad. School of Arts and Sciences, Univ. of Tokyo, 3.Tokyo Metropolitan Industrial Technology Research Institute, 4.Dept. of Earth Sciences, Univ. of Oxford)

*Sota Niki¹, Hirochika Sumino², Masahiro Kobayashi³, Hiroyuki Kagi¹, Takafumi Hirata¹, Chris J. Ballentine⁴ (1.Geochemical Research Center, Grad. School of Science, Univ. of Tokyo, 2.Dept. of Basic Science, Grad. School of Arts and Sciences, Univ. of Tokyo, 3.Tokyo Metropolitan Industrial Technology Research Institute, 4.Dept. of Earth Sciences, Univ. of Oxford)

*Yusuke Miyajima¹, Michał Jakubowicz^2,3, Takafumi Hirata¹ (1.Geochemical Research Center, Graduate School of Science, The University of Tokyo, 2.Institute of Geoecology and Geoinformation, Adam Mickiewicz University, Poland, 3.Isotope Laboratory, Adam Mickiewicz University, Poland)

*Yoshiki Makino¹, Yasuo Kuroki², Takafumi Hirata¹ (1.Geochemical Research Center, Graduate School of Science, The University of Tokyo, 2.Thermo Fisher Scientific)

*Satoki Okabayashi¹, Tetsuya Yokoyama¹, Takafumi Hirata², Kazuo Terakado³, Erick M. Galimov⁴ (1.Tokyo Institute of Technology, 2.The University of Tokyo, 3.Japan Space Forum, 4.Russian Academy of Science)

*Yusuke Miyajima¹, Ayaka Saito¹, Hiroyuki Kagi¹, Tatsunori Yokoyama², Takafumi Hirata¹ (1.Geochemical Research Center, Graduate School of Science, The University of Tokyo, 2.Tono Geoscience Center, Japan Atomic Energy Agency (JAEA))