*Kenichiro Tani¹, Yukiyasu Tsutsumi¹, Teruyoshi Imaoka², Kenji Horie³, Daniel Dunkley⁴ (1. National Museum of Nature and Science, 2. Yamaguchi University, 3. National Institute of Polar Research, 4. Polish Academy of Sciences)

*Yukiyasu Tsutsumi¹, Kenichiro Tani¹ (1. Department of Geology and Paleontology, National Museum of Nature and Science)

*Tetsuo Kawakami¹ (1. Graduate School of Science, Kyoto University)

*【ECS】Kazuya Shimooka¹, Mitsuhiro Nagata², Yasuhiro Ogita², Toshiro Takahashi³, Ken-ichiro Tani⁴, Satoshi Saito¹ (1. Ehime University, 2. JAEA, 3. Niigata University, 4. NMNS)

*Jonny Wu¹, Tsung-Jui Wu², Ken Yamaoka³ (1. University of Houston, USA, 2. Institute of Earth Sciences, Academia Sinica, Taiwan, 3. Research Institute of Geology and Geoinformation, Geological survey of Japan (GSJ))

*Yoshihiro NAKAMURA¹, Kazuhiro MIYAZAKI¹, Mitsuhiro NAGATA², Yutaka TAKAHASHI¹ (1. AIST, 2. Toyama University)

*Ken YAMAOKA^1,2, Simon Richard Wallis² (1. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 2. Department of Earth and Planetary Science, The University of Tokyo)