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Book Chapter

Kuju Iwo-yama Fumarole

By
Sachihiro Taguchi
Sachihiro Taguchi
Department of Earth System Science, Fukuoka University, Fukuoka 814-0180, Japan
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Koichiro Watanabe
Koichiro Watanabe
Department of Earth Resources Engineering, Kyushu University, Fukuoka 812-8581, Japan
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Masahiro Komatsu
Masahiro Komatsu
Department of Earth System Science, Fukuoka University, Fukuoka 814-0180, Japan
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Published:
January 01, 2001

Abstract

Kuju Iwo-yama is one of the most active fumarolic sites in Kyushu, last erupting in 1995, and is located at about 1,500 m above sea level on the northeastern slope of Mt. Hossho-zan (1,678 m). The site is 4 to 5 km to the southeast of the Otake-Hatchobaru water-dominated geothermal field. Condensates from fumaroles produce strongly acid Cl-SO4-type water with isotopic signatures indicating a magmatic origin. Advanced argillic alteration and sublimation of sulfur are significant at the fumarolic site. Here we can observe thermal manifestations of the modern analogue to high-sulfida- tion activity and compare them with the water-dominated Otake-Hatchobaru geothermal systems just kilometers away.

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Contents

Society of Economic Geologists Guidebook Series

Epithermal Gold Mineralization and Modern Analogues, Kyushu, Japan

Craig A. Feebrey
Craig A. Feebrey
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Toshihiko Hayashi
Toshihiko Hayashi
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Sachihiro Taguchi
Sachihiro Taguchi
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Society of Economic Geologists
Volume
34
ISBN electronic:
9781934969878
Publication date:
January 01, 2001

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