Unnamed Occurrence (ARDF - HU001; northwest of Lake Selby), Shungnak District, Northwest Arctic Borough, Alaska, USA
This page is currently not sponsored. Click here to sponsor this page.
Geology: This 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.
Workings: Only surface sampling.
Age: Cretaceous or younger.
Alteration: Oxidation of chalcopyrite to secondary copper and iron minerals.
Commodities (Major) - Cu; (Minor) - Zn
Development Status: None
Mineral List
5 entries listed. 4 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
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. Patton, W.W., Jr., and Miller, T.P., 1966, Regional geologic map of the Hughes quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-459, 1 sheet, scale 1:250,000.