TrekGEO > Mineral Trail > Tohoku region > Akita pref. > Chrysocolla

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Kisan-mori Mine

Kyowa-Funaoka, Daisen city, Akita pref., Japan


Field of view: 10 mm. Massive chrysocolla. The massive pale blue vein with a vitreous luster is chrysocolla. The blue crust at the lower right is linarite. The basement is gangue quartz encrusted with brown limonite.

Recovered from a meteoric oxidation zone of a moderate-temperature hydrothermal deposit in andesitic pyroclastics formed by dacite probably associated with a volcanic activity of a caldera.

Chrysocolla from this location was described in 1908.

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