9:45 AM - 10:00 AM
*Yuki Haneda1, Hideki Iwano2, Tohru Danhara2, Takafumi Hirata3, Jun Hosoi1, Yoshimi Kubota4, Koretaka Nakatani1, Makoto Okada5 (1.Geological Survey of Japan, AIST, 2.Kyoto Fission-Track Co., Ltd., 3.Geochemical research Center, The University of Tokyo, 4.National Museum of Nature and Science, 5.Department of Environmental Science, Ibaraki University)