TrekGEO > Mineral Trail > Koshinetsu region > Niigata pref. > Chalcopyrite

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Mikawa Mine

Araya, Aga city, Higashi-Kambara county, Niigata pref., Japan

Source for Copper


Field of view: 50 mm. Massive chalcopyrite. The massive yellow parts are chalcopyrite. The surrounding white parts are gangue quartz, and there are fine prismatic crystals in open spaces.

Recovered from a quartz vein of a moderate-temperature hydrothermal deposit associated with rhyolite. Formed in the early Miocene (21 Ma).

Chalcopyrite from this location was described in 1917.

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