*Dyuti Prakash Sarkar¹, Jun-ichi Ando¹, Kaushik Das¹, Gautam Ghosh², Prabir Dasgupta³ (1.Hiroshima University, 2.Presidency University, 3.Durgapur Govt. College)

*Jun-ichi Ando¹, Naotaka Tomioka², Hiroyuki Kagi³, Kaushik Das¹ (1.Department of Earth and Planetary Systems Science, Hiroshima University, 2.Kochi Core Center, JAMSTEC, 3.Geochemical Research Center, Graduate School of Science, University of Tokyo)

*Masahiro KAYAMA¹, Das Kaushik², Yuta Tsuchiya³ (1.Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, 2.Department of Earth and Planetary Systems Science, Hiroshima University, 3.Department of Biosphere-Geosphere Science, Okayama University of Science)

*Kaushik Das¹ (1.Hiroshima University)

*Fumihiko Sato¹, Tomoeki Nakakuki¹, Kaushik Das¹ (1.Hiroshima University)

*Kota Kojima¹, Jun-ichi Ando¹, Kaushik Das¹, Naotaka Tomioka² (1.Department of Earth and Planetary Systems Science, Hiroshima University, 2.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology)