D/H ratio of hydrogen and gas chemistry in three active geothermal systems, Northeast Japan.

Kiyosu, Yasuhiro

doi:10.2343/geochemj.21.67

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1988

1998

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Cited by 4 publications

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“…This suggests that H2S concen trations in the reservoir fluids increase with in creasing contribution of hydrothermal altera tion. The H2S concentration is probably controll ed by the activity of sulfur in the water-rock in teractions (Giggenbach, 1981;Kiyosu, 1987 to -14.5%0 for x180 and…”

Section: Resultsmentioning

confidence: 99%

Origin of some gases from the Takinoue geothermal area in Japan.

Kiyosu

Yoshida

1988

Geochem. J.

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Chemical and isotopic compositions were analyzed on geothermal steam from fumaroles and wells in the Takinoue geothermal area. The distribution of deuterium and oxygen-18 in water samples sug gests that the fumarole steam discharge is formed from the rising geothermal fluid through a single-step steam separation process at temperatures of approximately 150-240°C. On the basis of N2/Ar, He/Ar and C02/N2 ratios, and 813C values of carbon dioxide in steam, it is concluded that the gas components dissolved in the Takinoue geothermal waters are mixtures of magmatic gases and meteoric waters.

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Section: Resultsmentioning

confidence: 99%