|Quadrangle map, 1:250,000-scale||HU|
|Quadrangle map, 1:63,360-scale||D-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is located between Killak River and Lake Selby, about 3.5 miles north-northwest of the high point of land between Lake Selby and Narvak Lake and 3.5 miles southeast of Coal Pass. It is at an elevation of about 1,950 feet, 0.2 mile southwest of the center of section 10, T. 17 N., R. 14 E. of the Kateel River Meridian. Location is accurate within one-half mile.|
Geologic descriptionThis occurrence consists of a copper-bearing quartz vein in Cretaceous conglomerate (Patton and Miller, 1966). The vein contains chalcopyrite, and is stained with malachite, azurite, and limonite. The conglomerate borders pre-Cretaceous volcanic and metamorphic rocks, and the conglomerate is cut by a small, plug-like body of andesite porphyry. A rock sample contains more than 10% copper, 0.05% zinc, traces of cobalt, chromium, and nickel, 0.01 ounce of silver per ton, and no detectable gold. No other information is available.
|Geologic map unit||(-155.77920147062, 66.8854646324832)|
|Age of mineralization||Cretaceous or younger.|
|Alteration of deposit||Oxidation of chalcopyrite to secondary copper and iron minerals.|
|Workings or exploration||Only surface sampling.|
|Indication of production||None|
Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.
Bottge, R.G., 1988, Maps summarizing land availability for mineral exploration and development in western Alaska, 1986: U.S. Bureau of Mines Open-File Report 14-88, 38 quadrangle overlays.
Cobb, E.H., 1972, Metallic mineral resources map of the Hughes quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-458, 1 sheet, scale 1:250,000.
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in five quadrangles in west central Alaska (Hughes, Kotzebue, Melozitna, Selawik, Shungnak): U.S. Geological Survey Open-File Report 75-627, 58 p.
Degenhart, C.E., Griffis, R.J., McQuat, J.F., and Bigelow, C.G., 1978, Mineral studies of the western Brooks Range performed under contract to the U.S. Bureau of Mines, Contract #JO155089: U.S. Bureau of Mines Open-File Report 103-78, 529 p., 11 sheets.
Grybeck, Donald, 1977, Map showing known mineral deposits of the Brooks Range, Alaska: U.S. Geological Survey Open-File Report 77-166-C, 45 p., 1 sheet, scale 1:1,000,000.
|Reporters||J.M. Britton (Anchorage)|
|Last report date||8/1/2002|