Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Ore minerals azurite; malachite; tennantite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale CH
Quadrangle map, 1:63,360-scale D-4
Latitude 67.86
Longitude -148.81
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Steph occurrence is at an elevation of about 3,800 feet, approximately 5 1/2 miles west-northwest of Reds Lake in the hills north of and overlooking the North Fork Chandalar River (NW1/4 sec. 13, T. 35 N., R. 6 W., of the Fairbanks Meridian). The reference point corresponds to loc. 69 in DeYoung (1978) and is accurate within a 1/2-mile radius.

Geologic setting

Geologic description

This occurrence is described as malachite, azurite, and tennantite in a quartz vein (Grybeck, 1977). The country rocks are Devonian Skajit Limestone near a large body of greenstone interpreted as schistose hornblende diorite, pyroxene diorite sills, and andesitic flows(?) (Brosgé and Reiser, 1964). No other information is available.
Geologic map unit (-148.812767794025, 67.8596120404988)
Mineral deposit model Polymetallic veins? (Cox and Singer, 1986; model 22c?).
Mineral deposit model number 22c?

Production and reserves

Workings or exploration Claims (15?) staked by Placid Oil Co. in 1971-1973.
Indication of production None

Additional comments

See also: Bibban (CH090), Bob (CH089), Gayle (CH091), and Mowgli (CH094).