*Shuhei Totsuka¹, Jun-ichiro Ishibashi², Kazuhiko Shimada², Kei Ikehata³, Hideaki Machiyama⁴, Koichi Iijima⁴, Hirofumi Yamamoto⁴, Hidenori Kumagai⁴, Ken Ikehara⁵, Toru Yamasaki⁵, Yutaro Takaya⁶, Toshiro Nagase⁷, Thomas Tindell⁸, Kotaro Yonezu⁸, Yuki Tada⁸ (1.Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyushu University, 2.Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University, 3.Faculty of Life and Environmental Sciences, University of Tsukuba, 4.Research and Development Center for Submarine Resources, JAMSTEC, 5.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 6.Department of Resources and Environmental Engineering School of Creative Science and Enginerring, Waseda University, 7.Tohoku University Museum, 8.Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University)

*Yusuke Ohta¹, Tada-nori Goto¹, Katsuaki Koike¹, Weiren Lin¹, Koki Kashiwaya¹, Tadai Osamu³, Takafumi Kasaya², Toshiya Kanamatsu², Hidenori Kumagai², Hideaki Machiyama² (1.Kyoto University, 2.Japan Agency for Marine-Earth Science and Technology, 3.Marine Works Japan)

*Yoichi Usui¹, Koichi Iijima¹, Hideaki Machiyama¹, Yuji Ichiyama^2,1, Erika Tanaka³, Koichiro Fujinaga^4,3, Kazutaka Yasukawa^3,4 (1.Japan Agency for Marine-Earth Science and Technology, 2.Chiba University, 3.The University of Tokyo, 4.Chiba Institute of Technology)

*Hidenori Kumagai¹, Takafumi Kasaya¹, Shuhei Totsuka², Shinsuke Kawagucci¹, Hideaki Machiyama¹, Koichi Iijima¹, Hirofumi Yamamoto¹, junji kaneko¹, Yusuke Ohta³, Shohei Albert Tomita³, Shogo Komori⁴ (1.Japan Agency for Marine-Earth Science and Technology, 2.Kyushu Univ., 3.Kyoto Univ., 4.AIST)

*Jun-ichiro Ishibashi^1,2, Shuhei Totsuka², Akihi Tsutsumi², Naru Tsukamoto², Yusuke Kira², Kazuhiko Shimada¹, Toru Yamasaki³, Ken Ikehara³, Toshiro Nagase⁴, Yutaro Takaya^5,9, Kei Ikehata⁶, Takashi Goto⁷, Chitaro Gouzu⁷, Ryuichi Shinjo⁸, Hideaki Machiyama⁹, Koichi Iijima⁹, Hirofumi Yamamoto⁹, Hidenori Kumagai⁹ (1.Department of Earth and Planetary Sciences, Kyushu University, 2.Graduate School of Science, Kyushu University, 3.National Institute of Advanced Industrial Science and Technology, 4.Tohoku University Museum, 5.School of Creative Science and Enginerring, Waseda University, 6.Faculty of Life and Environmental Sciences, University of Tsukuba, 7.Hiruzen Institute for Geology and Chronology, 8.Faculty of Science, University of the Ryukyus, 9.Japan Agency for Marine-Earth Science and Technology)

*Hidenori Kumagai¹, Takafumi Kasaya¹, Shuhei Totsuka², Shinsuke Kawagucci¹, Hideaki Machiyama¹, Koichi Iijima¹, Hirofumi Yamamoto¹, junji kaneko¹, Yusuke Ohta³, Shohei Albert Tomita³, Shogo Komori⁴ (1.Japan Agency for Marine-Earth Science and Technology, 2.Kyushu Univ., 3.Kyoto Univ., 4.AIST)

*Jun-ichiro Ishibashi^1,2, Shuhei Totsuka², Akihi Tsutsumi², Naru Tsukamoto², Yusuke Kira², Kazuhiko Shimada¹, Toru Yamasaki³, Ken Ikehara³, Toshiro Nagase⁴, Yutaro Takaya^5,9, Kei Ikehata⁶, Takashi Goto⁷, Chitaro Gouzu⁷, Ryuichi Shinjo⁸, Hideaki Machiyama⁹, Koichi Iijima⁹, Hirofumi Yamamoto⁹, Hidenori Kumagai⁹ (1.Department of Earth and Planetary Sciences, Kyushu University, 2.Graduate School of Science, Kyushu University, 3.National Institute of Advanced Industrial Science and Technology, 4.Tohoku University Museum, 5.School of Creative Science and Enginerring, Waseda University, 6.Faculty of Life and Environmental Sciences, University of Tsukuba, 7.Hiruzen Institute for Geology and Chronology, 8.Faculty of Science, University of the Ryukyus, 9.Japan Agency for Marine-Earth Science and Technology)