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Campbell Prospect, Mount Jumbo, Prince of Wales Island, Ketchikan District, Prince of Wales-Outer Ketchikan Borough, Alaska, USA

Latitude: 55°15'47"N
Longitude: 132°38'38"W

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The Campbell prospect is on or surrounded by lands that have been conveyed to the Sealaska Corporation, who hold the surface and subsurface rights, or the land is under application for transfer to them.
Location: The Campbell prospect is about 1.4 mile northwest of Mount Jumbo and about 0.3 mile east-southeast of the center of section 21, T. 76 S., R. 84 E.
Geology: The Campbell prospect is in skarn near the contact of a small Cretaceous granodiorite stock that intrudes marble of the Wales Group of Late Proterozoic and Cambrian age (Herreid and others, 1978). The deposit consists of small, pyrrhotite-rich pods with chalcopyrite in the skarn. One sample contained 1,380 parts per million (ppm) copper, 20 ppm lead, 175 ppm zinc, 1.5 ppm silver, and a trace of gold. The prospect was explored by a 50-foot adit.
Workings: The only working consists of a 50-foot adit.
Age: Probably related to a nearby Cretaceous granodiorite intrusion.
Alteration: Deposit probably is genetically related to the skarn host rock.

Commodities (Major) - Ag, Cu, Zn; (Minor) - Au, Pb
Development Status: None
Deposit Model: Copper skarn (Cox and Singer, 1986; model 18b).

Mineral List

Chalcopyrite

Pyrrhotite

2 entries listed. 2 valid minerals.

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References

Herreid, Gordon, Bundtzen, T.K., and Turner, D.L., 1978, Geology and geochemistry of the Craig A-2 quadrangle, Prince of Wales Island, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 48, 49 p. Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. 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.
Current server date and time: 23rd May 2012 21:36:51