Paul; Jessie; James Prospects, Paul Lake, Prince of Wales Island, Ketchikan District, Prince of Wales-Outer Ketchikan Borough, Alaska, USA
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Geology: The vein at the Paul and Jessie prospects is generally considered to be the eastern extension of the vein at the Valpariso Mine (CR197) (Brooks, 1902; Wright and Wright, 1908; Herreid, 1967). Maas and others, 1991,1995) describe three short adits that expose a 1.8- to 4.0-foot-thick quartz vein in marble. The vein contains sparse pyrite, chalcopyrite, galena, sphalerite, and secondary copper minerals. It strikes about N70W, dips 10-25N, and can traced for about 220 feet in the workings. Eight samples across the vein contained 1.207 parts per million (ppm) to 1.105 ounces of gold per ton, 1.0 ppm to 1.84 ounces of silver per ton, and up to 310 ppm copper, 342 ppm lead, and 935 ppm zinc. The vein is conformable to the layering in a thick marble unit that is part of the Wales Group of Late Proterozoic and Cambrian age (Herreid, 1967). Wales Group rocks in the Dolomi area are folded into a large dome centered over the eastern third of Paul Lake, and consist of several marble layers 200 to 1300 feet thick, interbedded with calcareous chlorite schist and marble.
Workings: The only workings are three short adits that expose the vein.
Age: Vein is younger than the Late Proterozoic or Cambrian marble host rock.
Commodities (Major) - Au; (Minor) - Ag, Cu, Pb, Zn
Development Status: None
Deposit Model: Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a).
Mineral List
5 entries listed. 5 valid minerals.
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References
Brooks, A.H., 1902, Preliminary report on the Ketchikan mining district, Alaska, with an introductory sketch of the geology of southeastern Alaska: U.S. Geological Survey Professional Paper 1, 120 p. Herreid, Gordon, 1967, Geology and mineral deposits of the Dolomi area, Prince of Wales Island, Alaska: Alaska Division of Mines and Minerals Geologic Report 27, 17 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. Maas, K.M., Still, J. C., and Bittenbender, P. E., 1992, Mineral investigations in the Ketchikan mining district, Alaska, 1991 - Prince of Wales Island and vicinity: U.S. Bureau of Mines Open-File Report 81-92, 69 p. Maas, K.M., Still, J. C., Clough, A. H., and Oliver, L. K., 1991, Mineral investigations in the Ketchikan mining district, Alaska, 1990: Southern Prince of Wales Island and vicinity--Preliminary sample location maps and descriptions: U.S. Bureau of Mines Open-File Report 33-91, 139 p. Wright, F.E., and Wright, C.W., 1908, The Ketchikan and Wrangell mining districts, Alaska: U.S. Geological Survey Bulletin 347, 210 p.