Gold Content in Siliceous Deposits Formed from Acidic and Iron-rich Geothermal Waters at Hatchobaru, Central Kyushu, Japan |
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| Authors: | Akiko UCHIDA Takushi YOKOYAMA Koichiro WATANABE Eiji IZAWA |
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| Institution: | Department of Earth Resources Engineering, Kyushu University, Hakozaki, Higashi–ku, Fukuoka 812–8581, Japan [e-mail: ];Department of Chemistry, Kyushu University, Hakozaki, Higashi–ku, Fukuoka 812–8581, Japan |
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| Abstract: | Abstract: The gold content in siliceous deposits formed from geothermal waters at the Hatchobaru geothermal power station in central Kyushu, Japan, was determined by inductively coupled plasma quadrupole mass spectrometry (ICP–MS). It ranges from 1.3 to 4.6 mg/kg. The highest gold content was obtained from the siliceous deposit formed from acidic waters. In this siliceous deposit, hydrous iron(III) oxide of amorphous state is a major constituent, suggesting that hydrous iron(III) oxide might play an important role when gold is concentrated into siliceous deposits formed from acidic and iron-rich geothermal waters. |
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| Keywords: | gold hydrous iron(III) oxide siliceous deposit acidic and iron-rich geothermal water Hatchobaru geother-mal field |
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