*Akira Takasu¹, Yasumitsu Suzuki², Yoshiya Ohki³, Takahiko Ogawara⁴, Shizue Seto (Sakamoto) (1. Shimane University, 2. Masutomi Museum of Geoscience, 3. Nippon Chigaku Kenkyu-kai, 4. Fossa Magna Museum)

Rika Shimada¹, *Shunsuke Endo¹ (1. Shimane University)

*Kenta Yoshida¹, Atsushi Okamoto², Yasuhiro Niwa³, Masao Kimura³, Ryosuke Oyanagi⁴, Hikaru Sawada¹, Sota Niki⁵, Kazuki Yoshida² (1. Japan Agency for Marine-earth Science and Technology, 2. Graduate School of Environmental Studies, Tohoku University, 3. Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 4. Kokushikan University, 5. Geochemical Research Center, Graduate School of Science, The University of Tokyo)

*Yusaku Tanaka¹, Masaaki Owada¹ (1. Yamaguchi University)

*Tatsu Kuwatani¹, Mitsuhiro Toriumi¹ (1. JAMSTEC)