*Ryota Ichimura1, Yoshihiro Furukawa1, Tomoki Nakamura1, Megumi Matsumoto1, Mariko Ando (1.Department of Earth and Planetary Materials Sciences, Faculty of Science, Tohoku University)
convener:Wataru Fujiya(Ibaraki University, College of Science), Megumi Matsumoto(Graduate School of Science, Tohoku University), Shin Ozawa(Department of Earth Science, Graduate School of Science, Tohoku University), Yuki Hibiya(Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology)