Unnamed (southwest of Mt. Wade)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals sulfides

Geographic location

Quadrangle map, 1:250,000-scale YA
Quadrangle map, 1:63,360-scale D-2
Latitude 59.798
Longitude -138.706
Nearby scientific data Find additional scientific data near this location
Location and accuracy Occurrence is 1.5 miles southwest of Mt. Wade on the Alaska border. The occurrence is at an elevation of about 5500 feet about 0.1 mile northeast of the summit of hill 5790 (section 17, T. 24 S., R. 40 E., of the Copper River meridian). The location is probably accurate within 0.25 mile.

Geologic setting

Geologic description

The occurrence consists of sulfide-bearing amphibolite in a foliated series of mica schist, metavolcanics, and marble of Paleozoic age (MacKevett and Plafker, 1970). The amphibolite contained 0.15 percent zinc, 500 ppm copper, and weakly anomalous amounts of cobalt, nickel, titanium, and vanadium.
Geologic map unit (-138.707716475311, 59.7976931553913)
Mineral deposit model Mineralized mafic extrusive?, Volcanogenic?

Production and reserves

Workings or exploration Surface exposures only. MacKevett and Plafker (1970, table 1) reported 500 ppm copper and 1500 ppm zinc in sulfide-bearing amphibolite.
Indication of production None

Additional comments

The site is in Tongass National Forest and appears to be open for mineral location. The occurrence is low-grade, but of possible interest as a possible volcanogenic occurrence in layered metavolcanic rocks.

References