*Yuichi Okuma^1,2,3, Atsushi Noda³, Yasuhiro Yamada⁴, Hiroaki Koge³, Asuka Yamaguchi², Juichiro Ashi^1,2 (1.Department of Natural Environmental Studies, Graduate School of Frontier Sciences, the University of Tokyo, 2.Atmosphere and Ocean Research Institute, the University of Tokyo, 3.National Institute of Advanced Industrial Science and Technology, 4.Department of Earth Resources Engineering, Kyushu University)

*Takami Tachibana¹, Satoshi Tonai¹, Yasuhiro Yamada² (1.Kochi University, 2.Kyushu University)

*Hiroko Watanabe¹, Kunio Inoue¹, Taichi Sakai¹, William F McDonough^1,2,3, Natsue Abe⁴, Eiichiro Araki⁵, Takafumi Kasaya⁵, Masanori Kyo⁵, Kenta Ueki⁵, Tamano Omata⁵, Yasuhiro Yamada⁶ (1.Research Center for Neutrino Science, Tohoku University, 2.Department of Earth Science, Tohoku University, 3.University of Maryland, 4.Mantle Drilling Promotion Office, MarE3, Japan Agency for Marine-Earth Science and Technology, 5.Japan Agency for Marine-Earth Science and Technology, 6.Kyushu University)

*Takumu Nakamura¹, Arata Kioka², Yasuhiro Yamada² (1.Department of Earth Resources, Marine and Civil Engineering, Kyushu University, 2.Department of Earth Resources Engineering, Kyushu University)

*Satoshi Tonai¹, Hiro Ikeuchi¹, Yasuhiro Yamada², Binh Nguyen³, Toru Sano³ (1.Kochi University, 2.Kyushu University, 3.JX Nippon Oil & Gas Exploration)