*Keita Saito¹, Ke Wang¹, Ryuji Tada¹, Hongbo Zheng², Tomohisa Irino³, Saiko Sugisaki⁴, Yoshiaki Suzuki¹, Shunsuke Kurokawa¹, Masao Uchida⁵ (1.The University of Tokyo, 2.Nanjing Normal University, 3.Hokkaido University, 4.Geological Survey of Japan, AIST, 5.National Institute for Environmental Studies, Japan)

*Yoshiaki Suzuki¹, Takuya Sagawa², Ken Ikehara³, Takeshi Nakagawa⁴, Tomohisa Irino⁵, KR15-10 cruise members (1.The University of Tokyo, 2.Kanazawa University, 3.National Institute of Advanced Industrial, Science and Technology, 4.Ritsumeikan University, 5.Hokkaido University)

Yoshie Nakai¹, *Tomohisa Irino², Yoshiaki Suzuki³, Kazuyoshi Yamada⁴, Kana Nagashima⁵, Takeshi Nakagawa⁶, Ryuji Tada³ (1.Graduate School of Environmental Science, Hokkaido University, 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Department of Earth and Planetary Science, Graduate school of Science, The University of Tokyo, 4.Museum of Natural and Environmental history, Shizuoka, 5.Japan Agency for Marine-Earth Science and Technology, Research and Development Center for Global Change, 6.Ritsumeikan University)

*Kana Nagashima¹, Yoshiaki Suzuki², Takeshi Nakagawa³, Ryuji Tada², Tsuyoshi Haraguchi⁴, Katsuya Gotanda⁵ (1.Japan Agency for Marine-Earth Science and Technology, Research and Development Center for Global Change, 2.Department of Earth and Planetary Science, The University of Tokyo, 3.Ritsumeikan University, 4.Department of Geoscience, Osaka City University, 5.Faculty of Policy Informatics, Chiba University of Commerce)

*Yoshiaki Suzuki¹, Ryuji Tada¹, Kana Nagashima², Takeshi Nakagawa³, Tsuyoshi Haraguchi⁴, Katsuya Gotanda⁵, SG12/06 project members (1.The University of Tokyo, 2.JAMSTEC, 3.Ritsumeikan University, 4.Osaka City University, 5.Chiba University of Commerce)