Unnamed (west face of Rainbow Ridge south of Rainbow Mountain)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale B-4
Latitude 63.2767
Longitude -145.6216
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of 4,500 feet about 2.3 miles south of the top of Rainbow Mountain. It is in the SE1/4SW1/4 section 10, T. 19 S., R. 11 E., Fairbanks Meridian. The occurrence is described by Hanson (1963, locality 9), and it corresponds to locality 24 in Cobb (1979 [OFR 79-238]) and locality S115 in table 2 of Nokelberg and others (1991).

Geologic setting

Geologic description

This occurrence consist of chalcopyrite and pyrite in quartz veins as much as a half-meter wide that strike N 34 W and dip 70S to vertical (Hanson, 1963). The veins cut dacite tuff of the Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991).
Geologic map unit (-145.62384608647, 63.2762873864096)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Age of mineralization Pennsylvanian or younger.

Production and reserves

Indication of production None