TrekGEO > Mineral Trail > Koshinetsu region > Fukui pref. > Sphalerite

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Nakatatsu Mine

Kami-Ono, Ono city, Fukui pref., Japan

Source for Zinc, Cadmium, and Sulfuric acid.


Field of view: 100 mm. A sphalerite ore. The ore is composed of massive black sphalerite exhibiting perfect cleavage. The yellow grain with a metallic luster at the center is pyrite.

Recovered from a moderate-temperature hydrothermal deposit combined with skarn formed by contact metamorphism of I-type (magnetite-series) quartz porphyry. Formed in the Late Cretaceous (66 Ma).

Sphalerite from this location was described in 1895.

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