*Satoshi Yoshimaru¹, Shoichi Kiyokawa¹, Shiono Sakai¹, Takashi Ito², Minoru Ikehara³, Kenji Horie⁴, Mami Takehara⁴, Takashi Sano⁵, Frank K Nyame⁶, George M Tetteh⁷ (1.Department of Earth and Planetary Science, Kyushu University, 2.Ibaraki University, 3.Kochi University, 4.National Institute of Polar Research, 5.National Museum of Nature and Science, 6.University of Ghana, 7.University of Mines and Technology)

*Shiono Sakai¹, Shoichi Kiyokawa¹, Takashi Ito², Minoru Ikehara³, Kosei E. Yamaguchi⁴, Tetsuji Onoue⁵, Satoshi Yoshimaru¹, Tsubasa Miki¹, George M Tetteh⁶, Frank K Nyame⁷ (1.Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyusyu University., 2.Faculty of Education, Ibaraki University, 3.Center for Advanced Marine Core Research, Kochi University, 4.Toho University and NASA Astrobiology Institute, 5.Earth and Environmental Sciences, Graduate School of Science and Technology, Kumamoto University, 6.University of Mining and Technology,Ghana, 7.University of Ghana)

*Shiono Sakai¹, Shoichi Kiyokawa¹, Takashi Ito², Minoru Ikehara³, Kosei E. Yamaguchi⁴, Tetsuji Onoue⁵, Satoshi Yoshimaru¹, Tsubasa Miki¹, George M Tetteh⁶, Frank K Nyame⁷ (1.Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyusyu University., 2.Faculty of Education, Ibaraki University, 3.Center for Advanced Marine Core Research, Kochi University, 4.Toho University and NASA Astrobiology Institute, 5.Earth and Environmental Sciences, Graduate School of Science and Technology, Kumamoto University, 6.University of Mining and Technology,Ghana, 7.University of Ghana)