Unnamed (headwaters of Virginia Creek)

Prospect, Active

Commodities and mineralogy

Main commodities Ag; Cu; Pb; Zn
Ore minerals chalcopyrite; galena; pyrrhotite; sphalerite
Gangue minerals quartz; sericite

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale D-2
Latitude 63.828
Longitude -147.788
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 4,000 feet in the headwaters of Virginia Creek, a tributary of the Wood River. The site is in sec. 32, T.12 S., R. 1 W., of the Fairbanks Meridian. The location is accurate to within one-quarter mile.

Geologic setting

Geologic description

This deposit is a steeply-dipping stratabound massive sulfide horizon up to 13.1 feet thick in pelite and quartzite of the lower Paleozoic to possibly Upper Precambrian Birch Creek Schist (Wilson and others, 1998). The metasediments are cut by a lower Tertiary to Cretaceous intrusive stock on the southeastern boundary of the prospect area. The sulfide minerals are chalcopyrite, galena, pyrrhotite, and sphalerite. At least six drill holes have tested the deposit. Samples contain up to 0.53% copper, 1.89% lead, 6.51% zinc, 185.1 grams of silver per ton and 0.38 grams of gold per ton (www.grayd.com, 1999).
Geologic map unit (-147.790317361494, 63.8275629436388)
Mineral deposit model Kuroko massive sulfide (Cox and Singer, 1986; model 28a)
Mineral deposit model number 28a
Age of mineralization Mineralization was probably syngenetic with host rocks that are early Paleozoic to possibly Late Precambrian.

Production and reserves

Workings or exploration Geophysical and geochemical surveys have outlined the sulfide zone. At least six holes have been drilled at the prospect. Samples contain up to 0.53% copper, 1.89% lead, 6.51% zinc, 185.1 grams of silver per ton and 0.38 grams of gold per ton (www.grayd.com, 1999).
Indication of production None

References