*Hirochika SUMINO¹, Masahiro KOBAYASHI¹, Takehiko SAITO¹, Keisuke NAGAO¹, Chiaki TOYAMA², Yasuyuki MURAMATSU² (1.Geochemical Research Center, Graduate School of Science, University of Tokyo, 2.Department of Chemistry, Gakushuin University)

*Seiko YAMASAKI¹, Teruki OIKAWA¹, Masao BAN² (1.Geological Survey of Japan, AIST, 2.Faculty of Science, Yamagata Univ.)

*Hironobu HYODO¹ (1.RINS, Okayama Univ. of Sci.)

*Kazumi ITO¹ (1.Geological Survey of Japan, AIST)

*Akizumi ISHIDA¹, Naoto TAKAHATA¹, Yuji SANO¹, Jean DAVID², Daniela PINTI L.² (1.AORI the University of Tokyo, 2.University of Montreal)

*Kenji HORIE¹, Tomokazu HOKADA¹, Yoshikuni HIROI², Yoichi MOTOYOSHI¹, Kazuyuki SHIRAISHI¹ (1.NIPR, 2.Chiba University)

*Naho OTSUJI¹, Atsushi KAMEI², Noriyoshi TSUCHIYA³, Grantham G.H.⁴, Tetsuo KAWAKAMI⁵, Masahiro ISHIKAWA⁶ (1.Niigata University, 2.Shimane University, 3.Tohoku University, 4.Council for Geoscience, South Africa, 5.Kyoto University, 6.Yokahama National University)

*Kentaro KOINUMA¹, Satish-kumar MADHUSOODHAN¹, Kaoru MISHIMA², Yuichiro UENO², Tomokazu HOKADA³ (1.Niigata University, 2.Tokyo Institute of Technology, 3.National Institute of Polar Research)