竹富海底温泉の流体の起源とリザーバーの推定温度

土岐 知弘; 新城 竜一; 新垣 典之; 原 由宇; 満留 由来; 安村 幸真; 大嶋 将吾; 益田 晴恵; 井尻 暁; 中屋 眞司

doi:10.14862/geochemproc.68.0_126

Abstracts of Annual Meeting of the Geochemical Society of Japan

DOI https://doi.org/10.14862/geochemproc.68.0_126

Conference information

Host: Abstracts of Annual Meeting of the Geochemical Society of Japan

Name : Abstracts of Annual Meeting of the Geochemical Society of Japan

Number : 68

Date : September 01, 2021 - September 15, 2021

Origin of the fluid in Taketomi submarine hot spring and estimated temperature of the reservoir

*Tomohiro Toki, Ryuichi Shinjo, Noriyuki Shingaki, Yu Hara, Yuki Mitsutome, Koma Yasumura, Shogo Oushima, Harue Masuda, Akira Ijiri, Shinji Nakaya

Author information

Keywords: deep-sourced fluid, Ryukyu arc, Taketomi Submarine hot spring

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 126-

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Abstract

The boron isotope ratios of the Taketomi submarine hot spring and the cuttings from Taketomi Island were measured respectively, and it was found that the equilibrium may have been reached at about 150°C. The sulfur hexafluoride concentration indicates that the residence time is about 20 years. The isotope ratios of water also suggested the existence of a reservoir where groundwater and deep-seated fluids are mixed.

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