Tv Bas

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; pyrite
Gangue minerals epidote; zeolite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-5
Latitude 63.2309
Longitude -146.1725
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Tv Bas occurrence is at an elevation of about 4,400 feet 3.3 miles north of the east tip of Sevenmile Lake. It is just inside the northwest corner of section 35, T. 19 S., R. 8 E., Fairbanks Meridian. The location is accurate within 0.2 mile.

Geologic setting

Geologic description

The TV Bas occurrence is in outcrop and rubble crop of Tertiary gray to red-brown, locally vesicular olivine basalt that unconformably overlies mafic-ultramafic rocks of the Fish Lake complex of Late Triassic age (Nokleberg and others, 1991). The basalt is porphyritic; light green olivine phenocrysts occur in a fine-grained matrix. Vesicles contain epidote, zeolite (?), pyrite, and chalcopyrite fillings (W.T. Ellis, oral communication, 2001). Grab samples of vesicular basalt contain as much as 254 parts per million copper.
Geologic map unit (-146.174756449751, 63.2304755415126)
Mineral deposit model Unclassified.
Age of mineralization Tertiary.
Alteration of deposit Epidote and zeolite (?) filling in vesicles.

Production and reserves

Workings or exploration The occurrence is on active Fort Knox Gold Resource claims.
Indication of production None