2:15 PM - 2:30 PM
*Yoshihiro Nakamura1, Kazuhiro Miyazaki1, Makoto Takeuchi2,1, Hideki Iwano3, Tohru Danhara3, Takafumi Hirata4 (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 2.Graduate School of Environmental Studies, Nagoya University, 3.Kyoto Fission-Track CO., Ltd., 4.Geochemical Research Center, The University of Tokyo)