Home Creek

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Pb; Zn
Other commodities Cu; Mo
Ore minerals chalcopyrite; galena; molybdenite; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale CG
Quadrangle map, 1:63,360-scale A-3
Latitude 56.242
Longitude -158.701
Nearby scientific data Find additional scientific data near this location
Location and accuracy 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.

Geologic setting

Geologic description

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).
Geologic map unit (-158.703029247646, 56.2412152671464)
Mineral deposit model Polymetallic vein (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Age of mineralization Tertiary.
Alteration of deposit Sedimentary units of the Tolstoi Formation exhibit propylitization.

Production and reserves

Workings or exploration 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.
Indication of production None

Additional comments

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.

References

MRDS Number A012448
Reporters S.H. Pilcher (Anchorage)
Last report date 2/8/2000