AlunogenKonomai mines, Monbetsu, Hidaka Province, Hokkaido, Japan
Photo: Van King Latitude: 44°7'0"N
Longitude: 143°20'30"E
A prolific gold and silver mine, started in 1917. Production reached a peak in 1954 (3 tons Au per year), then declined and the mine was closed in 1973. (1958 production: 2.7 t Au, grade 6.4g/t; 39.1 t Ag, grade 94g/t.) Currently best known to collectors for its well-crystallized post-mining iron sulfates.
References
- Metal Mining Mining Geology, A.I.M.E. (1937): 305
- Geological Survey of Japan (1960): Geology and Mineral Resources of Japan, p.174-175.
- Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007): Mineral Resources Map of East Asia. Geological Survey of Japan.
Mineral List
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