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Besshi mine (Bessi mine), Niihama, Ehime Prefecture, Shikoku Island, Japan

Piemontite
Besshi mine, Niihama, Ehime Prefecture, Shikoku Island, Japan

Photo: 2008, JGW

Latitude: 33°51'10"N
Longitude: 133°18'50"E

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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.

Mineral List

Mineral list contains entries from the region specified including sub-localities

34 entries listed. 26 valid minerals.

Localities in this Region

Japan

Shikoku Island
- Ehime Prefecture
  - Niihama
    - Besshi mine (Bessi mine)
      - Honzan adit

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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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Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the 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 hundreds 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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