Affiliation: | Sogokaihatsu Co. Ltd., Nishi-Koiwa 1-30-16,;Edogawa-ku, Tokyo 133-0057, Japan Kochi University, Education, Kochi 780-8520,;Japan. E-mail: Institute for Frontier Research on Earth Evolution, JAMSTEC, Yokosuka, 237-0061,;Japan Institute for Study of the Earth's Interior, Okayama University, Misasa, Tottori-ken, 682-0193,;Japan |