|Quadrangle map, 1:250,000-scale||KL|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is about 9.8 miles south-south west of the center of Kurupa Lake and about 0.5 mile west of the center of section 28, T. 33 N., R. 18 E. The location is accurate to within one mile.|
Geologic descriptionThe rocks in the area are black shale, siltstone, sandstone, quartzite, and conglomerate of the Upper Devonian, Ear Peak Member of the Kanayut Conglomerate (Kurtak and others, 1995). Anastomosing, chalcopyrite-quartz veins stained with malachite and azurite cut sandstone. The veins trend north, dip east, and are exposed for about 60 meters. Select samples contain up to 0.56 percent copper; a 2-meter chip sample across a zone of mixed sandstone and quartz veins contained 0.01 percent copper.
|Geologic map unit||(-154.728577588775, 68.2299272840802)|
|Mineral deposit model||Chalcopyrite-quartz veins in sandstone.|
|Age of mineralization||Late Devonian or later based on the age of the host rock.|
|Alteration of deposit||Not noted.|
|Workings or exploration||Only limited sampling by the U.S. Bureau of Mines and the U.S. Geological Survey.|
|Indication of production||None|
Additional commentsMAS No. 0020210007
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); K.D. Kelley (U.S. Geological Survey); D.J. Grybeck (Contractor, U.S. Geological Survey)|
|Last report date||4/18/2010|