Unnamed (near the head of Willow Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Ag; Au
Ore minerals malachite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-2
Latitude 63.1058
Longitude -144.7357
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the ridge at the headwaters of Willow Creek, a southwest-flowing tributary of the Chisna River. The occurrence is at an elevation of about 5,500 feet near peak 5770. The occurrence is near the center of the W1/2SW1/4 section 8, T. 21 S., R. 16 E., Fairbanks Meridian. It corresponds to locality 142 in table 2 of Nokleberg and others (1991); the location is probably accurate within 0.2 mile.

Geologic setting

Geologic description

The rocks in the vicinity consist of meta-andesite porphyry of the Tetelna Volcanics of Pennsylvanian age (Nokleberg and others, 1991). The meta-andesite is locally stained with malachite; a grab sample assayed 0.64 percent copper, 15 parts per million (ppm) silver, and 0.20 ppm gold (Nokleberg and others, 1991).
Geologic map unit (-144.737926509944, 63.105403088661)
Mineral deposit model Polymetallic vein(s)? (Cox and Singer, 1986 model 22c?).
Mineral deposit model number 22c?
Age of mineralization Pennsylvanian or younger, on the basis of the age of host rocks.

Production and reserves

Workings or exploration Only limited surface sampling.
Indication of production None

References