*Taichi Sakai1, Kunio Inoue1, Hiroko Watanabe1, William F McDonough2,3, Kenta Ueki4, Natsue Abe4, Noriaki Sakurai4, Masanori Kyo4, Eiichiro Araki4, Takafumi Kasaya4, Hiroshi Yoshida4 (1.Tohoku university,Research Center for Neutrino Science, 2.Tohoku university, 3.University of Maryland, 4.JAMSTEC)
convener:Fumio Inagaki(Japan Agency for Marine-Earth Science and Technology), William F McDonough(Department of Earth Science and Research Center for Neutrino Science, Tohoku University, Sendai, Miyagi 980-8578, Japan), Susanne Buiter(Geological Survey of Norway), Chairperson:Fumio Inagaki(Japan Agency for Marine-Earth Science and Technology), William F McDonough(Department of Earth Science and Research Center for Neutrino Science, Tohoku University, Sendai, Miyagi 980-8578, Japan)