TrekGEO > Mineral Trail > Koshinetsu region > Yamanashi pref. > Malachite

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Kusama Mine

Shimobe, Minobu city, Minami-Koma county, Yamanashi pref., Japan

Source for copper


Field of view: 5 mm. A crust of malachite. The reniform green group is malachite. The black basement is a crust of manganese dioxide. The origin of Cu in malachite is copper and/or chalcopyrite in the ore.

Recovered from a meteoric oxidation zone of a mudstone-hosted Cu-Mn deposit subjected to Zeolite facies metamorphism. Formed in less than 50 years after the mine was closed,

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