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Okorogawa Mine

Naka-Okorogara, Nikko city, Tochigi pref., Japan


Moderately high-T hydrothermal deposit

Oxidation zone of the moderate temperature hydrothermal deposit. The deposit was produced in sedimentary rocks of Kurohone-Kiryu Complex, a member of Jurassic accretionary complex of Tamba-Mino-Ashio Belt.

Okorogawa Mine

Outcrop of the oxidation zone of the Cu-dominant moderately high-temperature hydrothermal deposit. The green part is thin crust of chrysocolla. The white host is sandstone of Kurohone-Kiryu Complex. Various secondary minerals were formed by oxidation of Cu-bearing minerals in the deposit.

Reported Minerals

Mineral Assemblages

  • Limonite - Azurite
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