|Quadrangle map, 1:250,000-scale||KL|
|Quadrangle map, 1:63,360-scale||A-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is about 6.0 miles northwest of the small lake at the divide between a tributary to Kakivilak Creek and head of Itilyiargiok Creek. It is about 0.5 mile north-northeast of the center of section 26, T. 32 N., R. 16 E. The location is accurate to within about a half mile.|
Geologic descriptionThe rocks in the area are Upper Devonian, Hunt Fork Shale and Noatak Sandstone. In a follow-up investigation of geochemical samples collected by the U.S. Geological Survey (Sutley and others, 1984), the Bureau of Mines discovered quartz-cemented breccia and quartz veins with galena and pyrite (Kurtak and others, 1995). A select sample of quartz-cemented breccia in shale contained 25 percent lead and 352 grams of silver per tonne. Another select sample of rubblecrop contained 7.3 percent lead, 9.3 percent zinc, more than 50 parts per million (ppm) silver, and 785 ppm copper. The extent of the mineralization was not determined.
|Geologic map unit||(-155.236069483142, 68.1482142880225)|
|Mineral deposit model||Silver-lead-zinc-quartz veins.|
|Age of mineralization||Late Devonian or younger based on the age of the host rock. Possibly Late Jurassic to Cretaceous based on analogy with other deposits in the western Brooks Range.|
|Alteration of deposit||Not noted.|
|Workings or exploration||Only limited sampling by the U.S. Geological Survey and U.S. Bureau of Mines.|
|Indication of production||None|
The occurrence is in the Gates of the Arctic National Park which is closed to prospecting and mining.MAS No. 002010009
|MRDS Number||A106135; A106138|
Kurtak, J.M., Meyer, M.P., Hicks, R.W., Werdon, M.B., and Mull, C.G., 1995, Mineral investigations in the Colville Mining District and southern National Petroleum Reserve in Alaska: U.S. Bureau of Mines Open-File Report 8-95, 217 p., 1 sheet, scale 1:250,000.
|Reporters||J.M. Schmidt (U.S. Geological Survey); D.J. Grybeck (Contractor, U.S. Geological Survey)|
|Last report date||4/18/2010|