|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||B-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of 4,200 feet about 0.4 mile southwest of VABM Canwell, near the northwest end of Rainbow Ridge. It is in the SW1/4NW1/4 section 29, T. 18 S., R. 11 E., Fairbanks Meridian. The occurrence is locality 4 of Hanson (1963), locality 19 of Cobb (1979 [OFR 79-238]), and locality S106 in table 2 of Nokelberg and others (1991).|
Geologic descriptionAt this locality, small quartz veins containing pyrite, chalcopyrite, and galena are stained with malachite and azurite (Hanson, 1963). The veins vary in attitude and cut sedimentary, volcanic, and dacite intrusive rocks of the Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991). Sulfide minerals are also disseminated in metatuff near a dacite intrusion (Nokleberg and others, 1991). Selected samples assayed 9.9 to 10.0 percent copper, 0.4 to 0.5 percent lead, and traces of gold and silver (Hanson, 1963). Grab samples collected by the U.S. Geological Survey assayed 10 percent copper, 0.5 percent lead, and a trace of gold (Nokleberg and others, 1991).
|Geologic map unit||(-145.693153420052, 63.3279876035858)|
|Mineral deposit model||Polymetallic veins; Porphyry Cu (Cox and Singer, 1986; model 22c, model 17).|
|Mineral deposit model number||22c, 17|
|Age of mineralization||Permian (?) or younger.|
|Alteration of deposit||Oxidation of copper minerals.|
|Workings or exploration||
Selected samples assayed 9.9 to 10.0 percent copper, 0.4 to 0.5 percent lead, and traces of gold and silver (Hanson, 1963). Grab samples collected by the U.S. Geological Survey assayed 10 percent copper, 0.5 percent lead, and a trace of gold (Nokleberg and others, 1991).The occurrence is on active claims of Northeast Exploration.
|Indication of production||None|
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.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
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||6/21/2002|