Unnamed (west of Mud Lake)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals bornite; chrysocolla

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-4
Latitude 63.0313
Longitude -145.554
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of 3,200 feet on the northeast flank of Paxson Mountain, 1 mile west of the south end of Mud Lake. It is on an east-flowing creek at the SE1/4SW1/4 section 1, T. 22 S., R. 11 E., Fairbanks Meridian. The occurrence corresponds to locality 2 in Rose and Saunders (1965) and to locality S94 in table 2 of Nokleberg and others (1991).

Geologic setting

Geologic description

This occurrence consists of a quartz-epidote vein, 3 inches thick, that contains bornite partly oxidized to chrysocolla (Rose and Saunders, 1965). The vein is in altered and sheared pillow metabasalt of the Nikolai Greenstone of Late Triassic age (Nokleberg and others, 1991). The metabasalt locally is altered to epidote and chlorite and is cut by a dark aphanitic dike.
Geologic map unit (-145.556220865801, 63.0308793338143)
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 altered to chlorite and epidote; copper mineral(s) are oxidized.

Production and reserves

Indication of production None

References