5:15 PM - 6:45 PM
*Jun Hosoi1,2, Tohru Danhara3, Hideki Iwano3,4 (1.Geological Survey of Japan, Institute of Geology and Geoinformation, AIST, 2.Department of Earth Sciences, College of Science, Ibaraki University, 3.Kyoto Fission-Track Co., Ltd., 4.Geochemical Research Center, The University of Tokyo)