A copper and cobalt mine; also produced pyrite for sulphuric acid production, and minor iron, silver and gold. Massive bedded compact sulfide orebody of the "Kieslager" type. Located 12 miles SE of Niihama on the Sambagawa metamorphic belt. Opened before 1902. Produced 10,425,800 pounds Cu (1902). 1958 production: 572,561 tons of ore, averaging 1.3% Cu; 7,396 t Cu, 1,710 t Fe, 62,026 t S, 3,618 Kg Ag, 15.9 Kg Au. Copper values were already declining then, and the mine is now closed. Total production up to 1960 were about 19 million tons ore averaging 3.8% Cu.
References
- Rocks & Min.: 21:568-569; 22:223.
- Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007): Mineral Resources Map of East Asia. Geological Survey of Japan
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