*Mami TAKEHARA¹, Kenji HORIE², Kenichiro TANI³, Takeyoshi YOSHIDA⁴, Tomokazu HOKADA², Shoichi KIYOKAWA⁵ (1.Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyushu University, 2.National Institute of Polar Research, 3.Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, 4.Institute of Earth Sciences, Graduate School of Science, Tohoku University, 5.Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu 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)

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

*Tsuyoshi TOYOSHIMA¹, Akiko KANEYA¹, Yasuhito OSANAI², Sotaro BABA³, Tomokazu HOKADA⁴, Nobuhiko NAKANO², Tatsuro ADACHI² (1.Niigata University, 2.Kyusyu University, 3.University of the Ryukyus, 4.National Institute of Polar Research)

*Chiaki IKAWA¹, Yoichi MOTOYOSHI², Tomokazu HOKADA², Kenji HORIE² (1.Department of Polar Science, the Graduate University for Advanced Studies, 2.National Institute of Polar Research)

*Chiaki IKAWA¹, Yoichi MOTOYOSHI², Tomokazu HOKADA², Kenji HORIE² (1.Department of Polar Science, the Graduate University for Advanced Studies, 2.National Institute of Polar Research)

*Yu KODAMA¹, Akira MIYAKE¹, Tomokazu HOKADA², Toshisuke KAWASAKI³ (1.Kyoto Univ., Sci., 2.National Institute of Polar Research, 3.Ehime Univ., Sci.)

*Yu KODAMA¹, Akira MIYAKE¹, Tomokazu HOKADA², Toshisuke KAWASAKI³ (1.Kyoto Univ., Sci., 2.National Institute of Polar Research, 3.Ehime Univ., Sci.)