Unnamed (southwest of Mud Lake)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals bornite; chalcopyrite; pyrite
Gangue minerals epidote; quartz

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-4
Latitude 63.0167
Longitude -145.5507
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of 3,700 feet approximately 1 mile east of the top of Paxson Mountain and about 1.3 miles south-southwest of Mud Lake. It is in the SE1/4SW1/4 section 12, T. 22 S., R. 11 E., Fairbanks Meridian. The occurrence corresponds to locality 5 in Rose and Saunders (1965) and locality S96 in table 2 of Nokleberg and others (1991).

Geologic setting

Geologic description

This occurrence consists of a zone about 30 feet wide of quartz-epidote veinlets and vuggy pods as much as 1 foot long and 6 inches wide that contain pyrite, chalcopyrite, and bornite (Rose and Saunders, 1965). The mineralized zone is limonite stained and extends along the wall of a gorge for 250 feet. The zone appears to dip north 20 degrees and is copper stained on its southern end. The host rock is metabasalt of Nikolai Greenstone of Late Triassic age that locally is highly fractured and altered to chlorite and epidote (Rose and Saunders, 1965).
Geologic map unit (-145.552919431983, 63.0162788401053)
Mineral deposit model Basaltic Cu (Cox and Singer, 1986; model 23).
Mineral deposit model number 23
Age of mineralization Probably Cretaceous.
Alteration of deposit The metabasalt host rock is highly fractured and altered to chlorite and some epidote.

Production and reserves

Indication of production None

References