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Hirase Mine

Hirase, Shirakawa city, Ohno county, Gifu pref., Japan


High-T hydrothermal deposit

High-temperature hydrothermal deposit in the middle Paleocene (60 Ma) Hirase Pluton of the Shirakawa Granite. The deposit is composed of molybdenite-bearing quartz veins. The Shirakawa Granite is I-type (Magnetite-series), and the Hirase Pluton is the center pluton of the Paleocene Shokawa Caldera. Ages of granite was determined by K-Ar radiometric dating of muscovite and K-feldspar.

Reported Minerals

Mineral Assemblages

  • Quartz(Gangue) - Molybdenite

Details of the mine

Mo is mined.


  • 1911: The deposit was found, and began to mine.
  • 1966: The mine was closed.
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