薩摩硫黄島長浜湾の鉄に富む海底温泉の起源

石橋 純一郎; 山口 宏典; 渕田 暢亮; 蝦名 直也; 堤 映日; 戸塚 修平; 清川 昌一; 大嶋 将吾

doi:10.14862/geochemproc.64.0_127

Abstracts of Annual Meeting of the Geochemical Society of Japan

DOI https://doi.org/10.14862/geochemproc.64.0_127

Conference information

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

Geochemical study of Fe-rich hot spring from the seafloor in Nagahama Bay, Satsuma-Iwojima

*Jun―ichiro Ishibashi, Hironori Yamaguchi, Nobuaki Fuchida, Naoya Ebina, Akihi Tsutsumi, Shuhei Totsuka, Shoichi Kiyokawa, Shogo Oshima

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Keywords: Hydrothermal precipitate, seafloor hot spring

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Pages 127-

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Abstract

Satsuma-Iwojima is a volcanic island belongs to Kikai Caldera. Along and beneath the shoreline, there are several hot springs. We collected and analyzed hot spring waters emanated from the seafloor in Nagahama Bay located in southwestern part of the island. The results are interpreted by a model that single source of Fe-rich hot spring is emanated from the seafloor and mixed with seawater. The seafloor hot spring is considered as one of Fe-rich hot springs that distribute around Inamura dake composed of basaltic rocks.

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