Galena

Field of view: 30 mm. Galena associated with chalcopyrite. The dark gray parts are galena exhibiting (100) cleavage. The yellow vein are chalcopyrite filling interstices of galena. The translucent white parts associated with galena and chalcopyrite are gangue quartz. The brown host at the lower left is andesitic tuff encrusted with limonite. There is a thin galena-chalcopyrite vein at the left.

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

Galena from this location was described in 1961.