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Home Creek Occurrence, Alaska Peninsula District, Lake and Peninsula Borough, Alaska, USA

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A part of this site is on land conveyed to or patented by the Bristol Bay Native Corporation. The remainder is within Alaska Peninsula National Wildlife Refuge.
Location: This site is located in sec. 31, T. 45 S., R. 60 W., of the Seward Meridian, approximately 2.5 miles northeast of Home Creek and 1 mile south of the Chignik River (Cox and others, 1981, locality 7). Location is accurate to within 1/2 mile.
Geology: This occurrence is a large color anomaly up to 1.5 miles wide which extends approximately 4 miles northeast from Home Creek towards Chignik Lagoon (Fields, 1977). The color is coincident with an area of pyritization and propylitization which may be related to a Tertiary dacite dike (Detterman and others, 1981) having a similar trend. The altered rocks are part of the Tolstoi Formation of Eocene and Paleocene age. Several large quartz veins, up to 10 feet wide, were discovered by Bear Creek Mining Company during the period 1975-1976 (Fields, 1977). These were observed to carry galena and rare pyrite. A chip sample contained 120 ppm copper, 6270 ppm lead, 11.6 ppm molybdenum, 19.2 ppm silver, and 1600 ppm zinc. Massive quartz float containing sphalerite and disseminated pyrite was reported by Resource Associates of Alaska in 1979. It contained 490 ppm copper, 190 ppm lead, 5.5 ppm silver, and 4400 ppm zinc (Anderson and others, 1979).
Workings: This occurrence was briefly examined by Bear Creek Mining Company in 1975-1976. A vein chip sample contained 120 ppm copper, 6270 ppm lead, 11.6 ppm molybdenum, 19.2 ppm silver, and 1600 ppm zinc. Resource Associates of Alaska examined the area in 1979. They reported massive quartz float that contained 490 ppm copper, 190 ppm lead, 5.7 ppm silver, and 4400 ppm zinc.
Age: Tertiary.
Alteration: Sedimentary units of the Tolstoi Formation exhibit propylitization.

Commodities (Major) - Ag, Pb, Zn; (Minor) - Cu, Mo
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c)

Mineral List

6 entries listed. 6 valid minerals.

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Anderson, G.D., Fitch, G.M., Lappie, D.W., Lindberg, P.A., and Fankhauser, R.E., 1979, Exploration and evaluation of Bristol Bay Native Corporation Lands, Vol. II, Book 1: Prepared for Houston Oil and Minerals Company by Resource Associates of Alaska, 78 p. (Report held by Alaska Earth Sciences, Inc., Anchorage, Alaska.) Cox, D.P., Detra, D.E., and Detterman, R.L., 1981, Mineral resource maps of the Chignik and Sutwik Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF- 1053-K, 2 sheets, scale 1:250,000. Detterman, R.L., Miller, T.P., Yount, M.E., and Wilson, F.H.,1981, Geologic map the Chignik and Sutwik Island quadrangles Alaska: U.S. Geologic Survey Miscellaneous Investigations Series Map I-1229, 1 sheet, scale 1:250,000. Fields, E.D., 1977, 1976 Annual report: Alaska search, Chignik area-Bristol Bay region: Bear Creek Mining Company, 44 p., 22 map sheets. (Report held by the Aleut Corporation, Anchorage, Alaska.)

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