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

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Agenosawa Mine

Nanokaichi, Kita-Akita city, Akita pref., Japan

Source for bismuth


Field of view: 30 cm. Bismuthinite associated with pyrite. The silver-white prisms are bismuthinite exhibiting perfect cleavage parallel to the prism. The yellow matrix around bismuthinite is aggregate of fine pyrite.

Recovered from a sulfide vein of a moderate-temperature hydrothermal deposit associated with dacite of a caldera complex. Formed in the late Miocene (10 Ma).

Bismuthinite from this location was described in 1972.

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