*Jiwon Eom¹, Shigeyuki Wakaki², Norikatsu Akizawa¹, Tsuyoshi Ishikawa², Kyoko Yamaoka³, Eiichi TAKAZAWA⁴, Hodaka Kawahata¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Kochi Institute for Core Sample Research, JAMSTEC, 3.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 4.Department of Geology, Faculty of Science, Niigata University)

*Akira Usui¹, Hikair Hino¹, Suzushima Suzushima¹, Naotaka Tomioka², Teruhiko Kashiwabara², Kyoko Yamaoka³, Michinari Sunamura⁴ (1.Marine Core Research Center, Kochi University, 2.Japan Agency of Earth and Marine Science a Technology, 3.Geological Survey of Japan, AIST, 4.Earth and Planetary Sciences, University of Tokyo)

*Kyoko Yamaoka¹, Atsushi Suzuki¹, Yuki Ota¹, Yuichiro Tanaka¹, Akifumi Shimamoto², Tatsuo Fukuhara², Junpei Minatoya³, Shogo Kato³, Yoshiaki Igarashi³, Nobuyuki Okamoto³ (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 2.KANSO Co.,Ltd., 3.Japan Oil, Gas and Metals National Corporation (JOGMEC))