TrekGEO > Mineral Trail > Tokai region > Shizuoka pref. > Bornite

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Takaneyama Mine

Naka, Shimoda city, Shizuoka pref., Japan

Source for Cu


Field of view: 5 mm. Granular bornite. The iridescent dark blue grains are bornite perched on the surface of white gangue quartz. The light blue parts are azurite crusts on the quartz surface.

Recovered from a moderate-temperature hydrothermal deposit associated with andesitic-basaltic pyroclastic rocks of an oceanic arc subjected to propylitization alteration. Formed in the Late Miocene (7.5 Ma).

Bornite from this location was described in 1982.

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