*Fumito Shiraishi¹, Yuya Matsumura¹, Ryoji Chihara¹, Tomoyo Okumura², TAKAAKI ITAI³, Teruhiko Kashiwabara⁴, Akihiro Kano³, Yoshio Takahashi³ (1.Hiroshima University, 2.Kochi University, 3.The University of Tokyo, 4.JAMSTEC)

*Tomoyo Okumura¹, Chuan-Chou Shen², Marjoor Ahmad Lone², Tsai-Luen Yu², Akihiro Kano³, Amekawa Shota³, Taiki Mori⁴, Yasuhiko Ohara^5,6 (1.Center for Advanced Marine Core Research, Kochi University, 2. High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, 3.Department of Earth and Planetary Science, The University of Tokyo, 4.Graduate school of integrated science for global society, 5.Hydrographic and Oceanographic Department of Japan, 6.Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science and Technology)

*Tomoyo Okumura¹, Chuan-Chou Shen², Marjoor Ahmad Lone², Tsai-Luen Yu², Akihiro Kano³, Amekawa Shota³, Taiki Mori⁴, Yasuhiko Ohara^5,6 (1.Center for Advanced Marine Core Research, Kochi University, 2. High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, 3.Department of Earth and Planetary Science, The University of Tokyo, 4.Graduate school of integrated science for global society, 5.Hydrographic and Oceanographic Department of Japan, 6.Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science and Technology)