Masahiro Kobayashi¹, *Hirochika Sumino², Keisuke Nagao³, Satoko Ishimaru⁴, Shoji Arai⁵, Masako Yoshikawa⁶, Tatsuhiko Kawamoto⁶, Yoshitaka Kumagai⁶, Tetsuo Kobayashi⁷, Ray Burgess⁸, Chris Ballentine⁹ (1.Geochemical Research Center, Graduate School of Science, University of Tokyo, 2.Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo, 3.Division of Polar Earth-System Sciences, Korea Polar Research Institute, 4.Department of Earth and Environmental Sciences, Graduate School of Science and Technology, Kumamoto University, 5.Department of Earth Sciences, Faculty of Science, Kanazawa University, 6.Beppu Geothermal Research Laboratory, Institute for Geothermal Sciences Graduate School of Sciences, Kyoto University, 7.Department of Earth and Environmental Sciences, Graduate School of Science and Engineering, Kagoshima University, 8.School of Earth and Environmental Sciences, University of Manchester, 9.Department of Earth Sciences, University of Oxford)

Masahiro Kobayashi¹, *Hirochika Sumino², Keisuke Nagao³, Satoko Ishimaru⁴, Shoji Arai⁵, Masako Yoshikawa⁶, Tatsuhiko Kawamoto⁶, Yoshitaka Kumagai⁶, Tetsuo Kobayashi⁷, Ray Burgess⁸, Chris Ballentine⁹ (1.Geochemical Research Center, Graduate School of Science, University of Tokyo, 2.Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo, 3.Division of Polar Earth-System Sciences, Korea Polar Research Institute, 4.Department of Earth and Environmental Sciences, Graduate School of Science and Technology, Kumamoto University, 5.Department of Earth Sciences, Faculty of Science, Kanazawa University, 6.Beppu Geothermal Research Laboratory, Institute for Geothermal Sciences Graduate School of Sciences, Kyoto University, 7.Department of Earth and Environmental Sciences, Graduate School of Science and Engineering, Kagoshima University, 8.School of Earth and Environmental Sciences, University of Manchester, 9.Department of Earth Sciences, University of Oxford)