*Satoshi Okumura¹, Kentaro Uesugi², Akio Goto¹, Atsuko Namiki³, Kazuhisa Matsumoto¹, Tatsuya Sakamaki¹ (1. Tohoku University (Japan), 2. SPring-8/JASRI (Japan), 3. Nagoya University (Japan))

*Alexey Kotov¹, Satoshi Okumura², Kenji Shimizu⁴, Isoji Miyagi³, Masaoki Uno¹, Noriyoshi Tsuchiya¹, Geri Agroli¹ (1. Graduate School of Environmental Studies, Tohoku University (Japan), 2. Graduate School of Science, Tohoku University (Japan), 3. Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan, AIST (Japan), 4. Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) (Japan))

*Masaaki Morita^1,2, Toshiya Mori¹, Ryunosuke Kazahaya² (1. Univ. Tokyo (Japan), 2. GSJ, AIST (Japan))

*Keiko Sato^1,3, Hidenori Kumagai^2,3 (1. Sakura no Seibo Junior College (Japan), 2. Gakushuin Women's College (Japan), 3. Submarine Resources Research Center, JAMSTEC (Japan))