*Naoki Hirakawa1, Yoko Kebukawa1, Yoshihiro Furukawa2, Kensei Kobayashi1 (1.Graduate School of Engineering Science, Yokohama National University, 2.Graduate School 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)