Miocene epithermal gold-silver veins. Kaolin is also exploited (from the hydrothermally altered wall rock).
1958 production: 376 Kg Au (average 6.1g per ton of ore); 3,728 Kg Ag (average 61g/t) (Geology and Mineral Resources of Japan, Geological Survey of Japan, 1960).
Mineral List:15 entries listed. 12 valid minerals.
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