Unnamed (northeast of upper Wood River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Cu
Ore minerals malachite

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale C-2
Latitude 63.738
Longitude -147.566
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 4,700 feet, in the headwaters of northeast tributaries to upper Wood River. The site is approximately 1 mile west of peak 6,850, in the NW1/4 of sec. 4, T. 14 S., R. 1 E., of the Fairbanks Meridian. The location is accurate to within 2000 feet. This is location 5 of Sherwood and others (1976).

Geologic setting

Geologic description

The country rocks in the area of this occurrence are Upper Triassic carbonaceous, calcareous shale, argillite, sandstone, siltstone, and limestone, along with numerous dikes, sills, and small plugs of altered diabase and gabbro (Wilson and others, 1998). The occurrence consists of gossan, and of malachite in fractures in the sedimentary rocks. Samples of the gossan contained 1 ppm gold (Sherwood and others, 1976).
Geologic map unit (-147.568300721642, 63.7375659236269)
Alteration of deposit Locally conspicuous iron staining and oxidation of copper minerals.

Production and reserves

Workings or exploration Surface exploration only. Samples of the gossan contained 1 ppm gold (Sherwood and others, 1976).
Indication of production None

References