Unnamed (east-northeast of 'Miller Mine')

Occurrence, Active

Commodities and mineralogy

Main commodities Cu; Zn
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 63.3395
Longitude -145.7028
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of 3,200 feet at the north end of Rainbow Ridge about 4,500 feet east-northeast of the 'Miller Mine' on the Richardson Highway. It is in the NE1/4SE1/4 section 19, T. 18 S., R. 11 E., Fairbanks Meridian. The occurrence corresponds to locality 2 in Hanson (1963), to locality 17 of Cobb (1979 [OFR 79-238]), and to locality S102 in table 2 of Nokleberg and others (1991).

Geologic setting

Geologic description

At this occurrence a 1.5-foot-thick replacement zone borders a quartz vein that strikes east-west and dips 65S (Hanson, 1963). The zone contains chalcopyrite and pyrite and is near a mineralized dike (Nokleberg and others, 1991). A U.S. Geological Survey grab sample of a 6.5-foot-thick pyritic metadacite dike intruding metagraywacke contained 1,000 ppm zinc. The vein cuts sedimentary and volcanic rocks of the Slana Spur Formation of Pennsylvanian age, which are locally intruded by granodiorite and dacite (Nokleberg and others, 1991).
Geologic map unit (-145.705054863467, 63.3390876987264)
Mineral deposit model Polymetallic vein (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Age of mineralization Permian (?) or younger.

Production and reserves

Workings or exploration The occurrence is on active claims of Northeast Exploration.
Indication of production None

References