*Maiko Sakuraba¹, Hirochika Sumino¹, Teruyuki Maruoka², Hiroyuki Matsuzaki³, Haruka Kusuno³, Marina Kawamoto³, Hironori Tokuyama³, Katsumi Syouzukawa¹, Mayumi Hori⁴ (1.Department of Basic Science,Graduate school,Arts and Sciences,University of Tokyo, 2.Faculty of Life and Environmrntal Scieences,University of Tsukuba, 3.Micro Analysis Laboratory,Tandem Accelerator,University of Tokyo, 4.College of Arts and Sciences,University of tokyo,Komaba)

*Maiko Sakuraba¹, Hirochika Sumino¹, Teruyuki Maruoka², Hiroyuki Matsuzaki³, Haruka Kusuno³, Marina Kawamoto³, Hironori Tokuyama³, Katsumi Syouzukawa¹, Mayumi Hori⁴ (1.Department of Basic Science,Graduate school,Arts and Sciences,University of Tokyo, 2.Faculty of Life and Environmrntal Scieences,University of Tsukuba, 3.Micro Analysis Laboratory,Tandem Accelerator,University of Tokyo, 4.College of Arts and Sciences,University of tokyo,Komaba)

*Teruyuki Maruoka¹, Sachiko Agematsu¹, Katsuo Sashida¹, Mat Niza² (1.Faculty of Life and Environmental Sciences, University of Tsukuba, 2.Geological Survey of Malaysia)

*Junichiro Kuroda^1,2, Hidetoshi Hara³, Katsumi Ueno⁴, Thasinee Charoentitirat⁵, Teruyuki Maruoka⁶, Takashi Miyazaki², Akira Miyahigashi⁴, Stefano Lugli⁷ (1.Atmosphere and Ocean Research Institute, the University of Tokyo, 2.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 4.Department of Earth System Science, Faculty of Science, Fukuoka University, 5.Department of Geology, Faculty of Science, Chulalongkorn University, 6.Graduate School of Life and Environmental Sciences, University of Tsukuba, 7.Dipartimento di Scienze Ghimiche e Geologiche, Universitá degli Studi di Modena e Reggio Emilia)