|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 7.4 miles northwest of the small lake at the divide between a tributary to Kakivilak Creek and the head of Itilyiargiok Creek; it is about 0.4 mile south of the center of section 17, T. 32 N., R. 16 E. The location is accurate to within about a half mile.|
Geologic descriptionThe rocks in the area consist of quartz and sandstone of the Upper Devonian, Hunt Fork Shale in thrust contact with the Upper Devonian or Lower Mississippian, Kanayut Conglomerate (Kurtak and others, 1995). The rocks are cut by silicified fault zones and quartz veins with sphalerite, galena, and pyrite, mostly found only as rubblecrop. A random chip sample from an outcrop of a quartz vein of unknown extent contained 7.1 percent zinc, 1.95 percent lead, and 0.2 percent copper. A series of selected samples of quartz veins contained up to 24 percent zinc, 1.6 percent lead, and 171 grams of silver per tonne. The extent of the mineralization was not determined.
|Geologic map unit||(-155.265272617785, 68.1683143711227)|
|Mineral deposit model||Silver-lead-zinc-quartz veins and quartz breccia.|
|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 mentioned.|
|Workings or exploration||Only limited sampling by government agencies.|
|Indication of production||None|
Additional commentsMAS No. 0020210008
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.
Meyer, M.P., and Kurtak, J.M., 1992, Results of the 1991 U.S. Bureau of Mines Colville mining district study: U.S. Bureau of Mines Open-File Report 75-92, 101 p.
|Reporters||J.M. Schmidt (U.S. Geological Survey); K.D. Kelley (U.S. Geological Survey); D.J. Grybeck (Contractor, U.S. Geological Survey)|
|Last report date||4/18/2010|