Unnamed (near Porcupine Dome)

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag; Sn
Ore minerals arsenopyrite; cassiterite; gold; silver

Geographic location

Quadrangle map, 1:250,000-scale CI
Quadrangle map, 1:63,360-scale C-4
Latitude 65.535
Longitude -145.496
Nearby scientific data Find additional scientific data near this location
Location and accuracy The location is the site of a sample of a small quartz vein described in U.S.G.S. OFR 84-479, Plate 1, No. 2FR2036 (Foster and others, 1984). Porcupine Dome is located approximately 3 miles east of Pinnell Mountain.

Geologic setting

Geologic description

Quartz veins that cut metamorphic rocks carry Au, Ag and cassiterite (Cobb, 1976, p. 53, [OFR 76-633]). There are no known granitic rocks in the area. A sample of iron- stained quartzite containing a small quartz vein carrying arsenopyrite(?) had 3.0 ppm Au, 1.0 ppm Ag. Nearby samples are anomalous in tin (W.D. Menzie, USGS 1982-83 field notes; Foster and others, 1984).
Geologic map unit (-145.49846634634, 65.5346247532456)

Production and reserves

Workings or exploration Surface sampling only.
Indication of production None