*Reishi Takashima¹, Haruka Kusakawa², Yuji Orihashi³, Hiroshi Nishi¹ (1.Tohoku University, 2.Chichibu Taiheiyo Cement Co. Ltd. , 3.Hirosaki University)

*Azumi Kuroyanagi¹, Takashi Toyofuku², Yukiko Nagai², Katsunori Kimoto², Hiroshi Nishi¹, Reishi Takashima¹, Hodaka Kawahata³ (1.The Center for Academic Resources and Archives, Tohoku University, 2.JAMSTEC, 3.Atmosphere and Ocean Research Institute, The university of Tokyo)

*Shunichi Kinoshita¹, Azumi Kuroyanagi², Hiroshi Nishi², Osamu Sasaki², Kazuhiko Fujita³, Atsushi Suzuki⁴, Hodaka Kawahata⁵ (1.Tohoku University, Graduate School of Science, 2.The Tohoku University Museum, 3.University of the Ryukyus, 4.Geological Survey of Japan National Institute of Advanced Industrial Science and Technology, 5.the University of Tokyo)

*Ayumi Maeda^1,2, Azumi Kuroyanagi³, Hiroshi Nishi³, Birgit Gaye⁴, Hodaka Kawahata^2,1 (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 2.Atmosphere and Ocean Research Institute, The University of Tokyo, 3.The Tohoku University Museum, Tohoku University, 4.Institute of Biogeochemistry and Marine Chemistry, University of Hamburg )

*Hiroshi Nishi¹, Reishi Takashima¹, Keiichi Hayashi², Kuwabara Sato², Yuji Orihashi³, Toshiro Yamanaka⁴ (1.The Center for Academic Resources and Archives, The Tohoku Museum Tohoku University, 2.Geological Survey of Hokkaido, 3.Hirosaki University, 4.Tokyo University of Marine Science and Technology)

*Masashi A. Ikeda¹, Ken Sawada², Takuto Ando³, Hideto Nakamura⁴, Reishi Takashima⁵, Hiroshi Nishi⁵ (1.Graduate School of Science, Hokkaido University, 2.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, 3.Estuary Research Center, Shimane University, 4.Faculty of Science, Osaka City University, 5.The Center for Academic Resources and Archives, The Tohoku University Museum, Tohoku University)