10:15 AM - 10:30 AM
*Shuhei Totsuka1, Jun-ichiro Ishibashi2, Tatsuo Nozaki3, Kazuhiko Simada2 (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.Research and Development Center for Submarine Resources, JAMSTEC)