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Unnamed (east-northeast of 'Miller Mine')

Occurrence, Active

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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

References

Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mount Hayes quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-238, 140 p.
Hanson, L.G., 1963, Bedrock geology of the Rainbow Mountain area, Alaska Range, Alaska: Alaska Division of Mines and Minerals Geologic Report 2, 82 p., 2 plates.
Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
Reporters W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)
Last report date 6/20/2002