6:15 PM - 7:30 PM
*Hikari MUKUMOTO1, Masayo MINAMI2, Toshio NAKAMURA2, Hiroyuki KAGI3 (1.Department of Earth & Planetary Sciences, Nagoya University, 2.Center for Chronological Research, Nagoya University, 3.Geochemical Research Center, Graduate School of Science, The University of Tokyo)