TY - JOUR
T1 - Gas geochemistry of geothermal fluids from the Hatchobaru geothermal field, Japan
AU - Ishibashi, Junichiro
AU - Yamashita, Kei
AU - Kitamura, Keigo
AU - Fujimitsu, Yasuhiro
AU - Oshima, Syogo
AU - Kiyota, Yumi
N1 - Funding Information:
We appreciate cooperation of the Kyushu Electric Power Co. Inc. in sampling and permitting to publish the dataset. We express our special thanks to Kyuden Sangyo Co. Inc. for their sampling operation and analysis of gas species. We thank anonymous reviewers for constructive comments that helped improve the manuscript.
Funding Information:
This study was conducted with support from the “Potential survey and estimation of power generation of supercritical geothermal resources in East Japan and Kyushu, Japan (FY2018–2020)” project that was funded by the New energy and industrial technology development organization (NEDO).
Publisher Copyright:
© 2022
PY - 2022/6
Y1 - 2022/6
N2 - We analyzed the chemical and isotopic composition of the geothermal fluids from the Hatchobaru geothermal field in the Kyushu Island, Japan. Fluid chemistry showed similarity with that reported in earlier studies. Chemical geothermometry provided an estimated reservoir temperature of 250–300 °C. Helium and carbon isotopic ratios of the steam is likely to reflect the signature of the magmatic heat source. The apparent equilibrium temperature for carbon isotope exchange between CO2 and CH4 was 375–430 °C. The sulfur isotope data were in accordance with the idea that an acidic Cl-SO4-type fluid was modified from a neutral Cl-type fluid.
AB - We analyzed the chemical and isotopic composition of the geothermal fluids from the Hatchobaru geothermal field in the Kyushu Island, Japan. Fluid chemistry showed similarity with that reported in earlier studies. Chemical geothermometry provided an estimated reservoir temperature of 250–300 °C. Helium and carbon isotopic ratios of the steam is likely to reflect the signature of the magmatic heat source. The apparent equilibrium temperature for carbon isotope exchange between CO2 and CH4 was 375–430 °C. The sulfur isotope data were in accordance with the idea that an acidic Cl-SO4-type fluid was modified from a neutral Cl-type fluid.
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U2 - 10.1016/j.geothermics.2022.102379
DO - 10.1016/j.geothermics.2022.102379
M3 - Article
AN - SCOPUS:85125944872
VL - 102
JO - Geothermics
JF - Geothermics
SN - 0375-6505
M1 - 102379
ER -
