Cubanite occurs as small veinlets in chalcopyrite and as anhedral aggregates of small grains. Individual grains or aggregates are not common. Pyrargyrite occurs as unoriented grains in chalcopyrite. Cubanite was reported from liq. magmatic, pegmatitic, pneumatolytic, and hydrothermal veins. The presence of Cubanite in the S ores shows that the complex ore deposition is formed by hydrothermal process at temps. >250°. Pyrargyrite is an earlier mineral formed through the hydrothermal process
