Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-2
Latitude 63.11
Longitude -147.702
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 3,600 feet on the west bank of an unnamed, southeast-flowing tributary of Wickersham Creek. It is about 6 miles west of the Denali Highway bridge over the Susitna River. The site is in the NW1/4 of sec. 11, T. 21 S., R. 1 W., of the Fairbanks Meridian. The location is accurate to within 1,000 feet. This is locality 13 of Smith and others (1975: OFR 69).

Geologic setting

Geologic description

This occurrence consists of chalcopyrite disseminations in an altered intrusive rock that cuts metamorphosed Lower Cretaceous and Upper Jurassic flysch (Wilson and others, 1998). The intrusive rock probably is an apophysis of the quartz monzonite stock at the Gold Hill prospect (HE172). The stock is correlated with the Tertiary (63 and 55 Ma) Butte Lake pluton (Smith and others, 1988).
Geologic map unit (-147.704259622332, 63.1095480597731)
Mineral deposit model Porphyry Cu-Au (Cox and Singer, 1986; model 20c)
Mineral deposit model number 20c
Age of mineralization Tertiary, assuming that the deposit is indigenous to the intrusive host rock.

Production and reserves

Workings or exploration Surface exploration only.
Indication of production None