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

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Sayama Mine

Ani-Kayakusa, Kita-Akita city, Akita pref., Japan

Source for Zinc, Cadmium, and Sulfuric acid.


Field of view: 30 mm. Sphelerite veins. The transparent brown veins exhibiting perfect cleavage are sphalerite. The surrounding massive green host is andesitic tuff subjected to chloritization alteration.

Recovered from a moderate-temperature hydrothermal deposit in andesitic pyroclastics formed by dacite probably associated with volcanic activity of a caldera. Formed in the middle Miocene (15 Ma).

Sphalerite from this location was described in 1968.

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