|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 4,250 feet on the southwest flank of Rainbow Ridge about 1.2 miles west-northwest of the top of Rainbow Mountain. It is in the NE1/4NE1/4 section 32, T. 18 S., R. 11 E., Fairbanks Meridian. This site corresponds to locality 5 in Hanson (1963), locality 20 of Cobb (1979 [OFR 79-238]), and locality S108 in table 2 of Nokelberg and others (1991).|
Geologic descriptionAt this location chalcopyrite and galena occur in quartz veins 6 or more inches thick that strike N5W and dip 70 to 80W (Hanson, 1963). The veins form a subparallel set that cuts tuffaceous sedimentary rocks of the Slana Spur Formation of Pennsylvanian age near a Permian dacite hypabyssal intrusion (Nokleberg and others, 1991). Hanson (1963) collected samples that assayed 3.99 percent copper, 0.02 ounce of gold per ton, and 1.4 ounces of silver per ton.
|Geologic map unit||(-145.67525166615, 63.3157875986761)|
|Mineral deposit model||Polymetallic veins; Porphyry Cu (Cox and Singer, 1986; model 22c, model 17).|
|Mineral deposit model number||22c, 17|
|Age of mineralization||Probably Permian.|
|Workings or exploration||
Hanson (1963) collected samples that assayed 3.99 percent copper, 0.02 ounce of gold, and 1.4 ounces of silver per ton.The occurrence is on active claims of Northeast Exploration.
|Indication of production||None|
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||6/21/2002|