Campbell Prospect, Mount Jumbo, Prince of Wales Island, Ketchikan District, Prince of Wales-Outer Ketchikan Borough, Alaska, USA
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).
| Chalcopyrite|| Pyrrhotite|
2 entries listed. 2 valid minerals.
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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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Locality Updated: Ciapa Liscia, Piacenza Province, Emilia-Romagna, ItalyFrom Bruno Marello, 10th Dec 2013 10:45:58