3:45 PM - 4:00 PM
*Tomoeki NAKAKUKI1, Takeo KANEKO1, Atsushi NAKAO2, Hikaru IWAMORI3 (1.Dept. Earth and Planetary Systems Science, Hiroshima Univ., 2.Dept. Earth and Planetary Sciences, Tokyo Inst. Technology, 3.Geochemical Evolution Research Program, JAMSTEC)