*Eiichi TAKAZAWA¹, Nami KANKE², Satoru FUJII², Yuki NOMOTO², Yuki KUSANO³, Susumu UMINO³, Yoshihiko TAMURA¹ (1.R & D Center for Ocean Drilling Science, Japan Agency for Maine-Earth Science and Technology, 2.Graduate School of Science and Technology, Niigata University, 3.Division of Natural systems, College of Science and Engineering, Kanazawa University)