Tiger and W and L

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Ag; Au
Ore minerals chalcopyrite; copper; pyrrhotite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale A-3
Latitude 60.0197
Longitude -147.8934
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is located in the NW1/4 section 10, T. 2 S., R. 9 E., of the Seward Meridian, at an elevation of about about 1,000 feet. It is in a glacial cirque, about 0.5 mile south of Snowy Lake. This is location S-5 of Jansons and others (1984). This location is accurate to within 300 feet.

Geologic setting

Geologic description

Nelson and others (1985) mapped the bedrock in this area as Orca Group of early Tertiary age. The prospect is on the northwest limb of a shallowly dipping, northeast-plunging antiform (Stejer, 1956). The prospect consists of chalcopyrite-pyrrhotite quartz stringers with rare native copper hosted in graywacke. The workings on the prospect consist of a single open-cut (Kurtak and Jeske, 1986). The U.S. Bureau of Mines collected two grab samples from the workings; one sample contained 1.4 percent copper, 19.5 ppm silver, and 0.6 ppm gold; the other sample contained 100 ppm copper, 5.5 ppm silver, and 0.09 ppm gold (Kurtak and Jeske, 1986).
Geologic map unit (-147.895410242845, 60.0190485543511)
Mineral deposit model Besshi massive sulfide (Cox and Singer, 1986; model 24b)
Mineral deposit model number 24b
Age of mineralization Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.

Production and reserves

Workings or exploration The workings on the prospect consist of a single, open cut (Kurtak and Jeske, 1986). The U.S. Bureau of Mines collected two grab samples from the workings; one sample contained 1.4 percent copper, 19.5 ppm silver, and 0.6 ppm gold; the other sample contained 100 ppm copper, 5.5 ppm silver, and 0.09 ppm gold (Kurtak and Jeske, 1986).
Indication of production None

Additional comments

Kennecott Copper Corporation company records from 1916 to 1971 mention this prospect. These records can be inspected upon request at the Bureau of Land Management office in Anchorage, Alaska.

References