Magmatic fluid input to the Kuju-Iwoyama hydrothermal system prior to the 1995 eruption of the Kuju volcano (Kyushu, Japan)

Itsuro Kita; Tatsuji Kai; Ryuichi Itoi; Makiko Ishida; Akira Ueda

doi:10.1016/j.geothermics.2009.04.002

Magmatic fluid input to the Kuju-Iwoyama hydrothermal system prior to the 1995 eruption of the Kuju volcano (Kyushu, Japan)

Itsuro Kita^*, Tatsuji Kai, Ryuichi Itoi, Makiko Ishida, Akira Ueda

^*Corresponding author for this work

Faculty of Science

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A schematic model showing the sources of hot waters being discharged at the surface in the Kuju-Iwoyama of the Kuju volcano has been developed. Based on the isotopic characteristics of these fluids it is inferred that deep magmatic fluid mixes with thermal waters derived from rainwater in a shallow geothermal reservoir, and with local groundwaters in a deeper reservoir. These thermal waters feed hot springs that discharge waters with Cl/SO₄ ratios that differ from that of the fumaroles on Kuju-Iwoyama, due to the addition of SO₄^2- ions produced by the decomposition of native sulfur and mixing with magmatic fluid of high Cl content.

Original language	English
Pages (from-to)	294-302
Number of pages	9
Journal	Geothermics
Volume	38
Issue number	3
DOIs	https://doi.org/10.1016/j.geothermics.2009.04.002
State	Published - 2009/09

Keywords

Cl and SO content
Geothermal
Kuju-Iwoyama
Magmatic fluid
Rainwater
δD, δO and δS isotope

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Geotechnical Engineering and Engineering Geology
Geology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.geothermics.2009.04.002

Cite this

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title = "Magmatic fluid input to the Kuju-Iwoyama hydrothermal system prior to the 1995 eruption of the Kuju volcano (Kyushu, Japan)",

abstract = "A schematic model showing the sources of hot waters being discharged at the surface in the Kuju-Iwoyama of the Kuju volcano has been developed. Based on the isotopic characteristics of these fluids it is inferred that deep magmatic fluid mixes with thermal waters derived from rainwater in a shallow geothermal reservoir, and with local groundwaters in a deeper reservoir. These thermal waters feed hot springs that discharge waters with Cl/SO4 ratios that differ from that of the fumaroles on Kuju-Iwoyama, due to the addition of SO42- ions produced by the decomposition of native sulfur and mixing with magmatic fluid of high Cl content.",

keywords = "Cl and SO content, Geothermal, Kuju-Iwoyama, Magmatic fluid, Rainwater, δD, δO and δS isotope",

author = "Itsuro Kita and Tatsuji Kai and Ryuichi Itoi and Makiko Ishida and Akira Ueda",

year = "2009",

month = sep,

doi = "10.1016/j.geothermics.2009.04.002",

language = "英語",

volume = "38",

pages = "294--302",

journal = "Geothermics",

issn = "0375-6505",

publisher = "Elsevier Ltd.",

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T1 - Magmatic fluid input to the Kuju-Iwoyama hydrothermal system prior to the 1995 eruption of the Kuju volcano (Kyushu, Japan)

AU - Kita, Itsuro

AU - Kai, Tatsuji

AU - Itoi, Ryuichi

AU - Ishida, Makiko

AU - Ueda, Akira

PY - 2009/9

Y1 - 2009/9

N2 - A schematic model showing the sources of hot waters being discharged at the surface in the Kuju-Iwoyama of the Kuju volcano has been developed. Based on the isotopic characteristics of these fluids it is inferred that deep magmatic fluid mixes with thermal waters derived from rainwater in a shallow geothermal reservoir, and with local groundwaters in a deeper reservoir. These thermal waters feed hot springs that discharge waters with Cl/SO4 ratios that differ from that of the fumaroles on Kuju-Iwoyama, due to the addition of SO42- ions produced by the decomposition of native sulfur and mixing with magmatic fluid of high Cl content.

AB - A schematic model showing the sources of hot waters being discharged at the surface in the Kuju-Iwoyama of the Kuju volcano has been developed. Based on the isotopic characteristics of these fluids it is inferred that deep magmatic fluid mixes with thermal waters derived from rainwater in a shallow geothermal reservoir, and with local groundwaters in a deeper reservoir. These thermal waters feed hot springs that discharge waters with Cl/SO4 ratios that differ from that of the fumaroles on Kuju-Iwoyama, due to the addition of SO42- ions produced by the decomposition of native sulfur and mixing with magmatic fluid of high Cl content.

KW - Cl and SO content

KW - Geothermal

KW - Kuju-Iwoyama

KW - Magmatic fluid

KW - Rainwater

KW - δD, δO and δS isotope

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U2 - 10.1016/j.geothermics.2009.04.002

DO - 10.1016/j.geothermics.2009.04.002

M3 - 学術論文

AN - SCOPUS:68049118563

SN - 0375-6505

VL - 38

SP - 294

EP - 302

JO - Geothermics

JF - Geothermics

IS - 3

ER -

Magmatic fluid input to the Kuju-Iwoyama hydrothermal system prior to the 1995 eruption of the Kuju volcano (Kyushu, Japan)

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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