Epithermal gold-silver veins with quartz-calcite gangue in Miocene andesite, owned by Mitsui Mining (1958 production: 804 Kg Au, grade 5.3g/t ; 6.8 tons Ag, grade 47g/t.)
Mine now closed. Famous among collectors for its superb calcite "butterfly twins".
References:
Ore Geology Reviews 34 (2008) 597-609
Econ Geol (1985) 80:283-293
Mineral List:29 entries listed. 25 valid minerals.
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