Chalcopyrite

Naganobori, Mito village, Mine city, Yamaguchi pref., Japan

Source for Copper

Field of view: 40 mm. Chalcopyrite associated with hedenbergite. The massive yellow parts are chalcopyrite. The dark green host is hedenbergite composed of parallel prisms elongated vertically.

Recovered from a pneumatolytic deposit combined with skarn formed by contact metamorphism of S-type (ilmenite-series) granite. Formed in the Late Cretaceous (85 Ma).

Chalcopyrite from this location was described in 1902.

Other localities

List of Japanese chalcopyrite localities

Kisan-mori Mine (Hydrothermal, with Galena)
Mikawa Mine (Hydrothermal, Massive)
Sayama Mine (Hydrothermal, Tetrahedral)
Naganobori Mine (Pneumatolytic Skarn, Massive)
Kusama Mine (Bedded Mn, Massive)