RhodochrositeInakuraishi mine, Furubira, Shakotan peninsula, Shiribeshi Province, Hokkaido, Japan
Photo: A&M Latitude: 43°9'N
Longitude: 140°38'E
Largest manganese deposit in Japan. (1944 production: 72,000 tons @ 27% Mn, mainly from rhodochrosite.) Mine now closed. En echelon hydrothermal rhodochrosite veins in Tertiary volcanosedimentary rocks. The largest vein had a strike of 900 meters, x 5m thick. Has produced many beautiful rhodochrosite specimens now widely distributed in collections.
References
- 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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