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Inakuraishi mine, Furubira, Shakotan peninsula, Shiribeshi Province, Hokkaido, Japan
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Rhodochrosite
Inakuraishi 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.

Mineral List

Acanthite
Alabandite
Arsenopyrite
Baryte
Calcite
Chalcopyrite
'Chlorite Group'
Fizélyite ?
Galena
Ilesite
Inesite
Jôkokuite
Pyrite
Quartz
Ramdohrite
Rhodochrosite
Sphalerite
Stibnite
Tetrahedrite
Uchucchacuaite


20 entries listed. 18 valid minerals. 1 erroneous literature entry.

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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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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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