|Quadrangle map, 1:250,000-scale||WI|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 4,350 feet, about 0.2 mile southeast of peak 4816, near the southeast corner of section 13, T. 32 N., R. 20 W., of the Fairbanks Meridian. The location is accurate within about one-half mile.|
Geologic descriptionThis occurrence is one of several that define a northeast trending zone of minor copper occurrences that extends northeast for about 5 miles from VABM Allen on the Wiseman C-5 topographic map (also see WI005, 006, 013, 014, and 016). This occurrence was first described by Brosge and Reiser (1960) as copper sulfides, galena and malachite in a quartz vein in Devonian phyllite and siltstone below a thrust plate of Devonian Skajit Limestone. Nearby, Dillon and others (1981, localities 244 and 245 [AOF 133B]) sampled mineralized pebble conglomerate and cross-bedded metasandstone near a facies change from metaclastic to metacarbonate rocks. The pebble conglomerate was malachite-stained and contained disseminated chalcopyrite, sphalerite, and galena. The metasandstone contained sphalerite and abundant hematite. Samples from these two units contain up to 7,000 ppm copper, 10 ppm silver, more than 1% titanium, 70 ppm scandium, 700 ppm vanadium, 500 ppm zinc, and 100 ppm molybdenum. Kurtak and others (1999) collected two selected bedrock samples of micaceous schist and limestone and a sample of quartz-chlorite schist float that contains bornite, malachite, and possibly galena; one sample has 11% copper, 17 ppb gold, and 68.9 ppm silver.
|Geologic map unit||(-151.904857374327, 67.5923458437862)|
|Mineral deposit model||Polymetallic vein? (Cox and Singer, 1986; model 22c?).|
|Mineral deposit model number||22c?|
|Workings or exploration||Only surface sampling.|
|Indication of production||None|
Additional commentsSee also WI014. This occurrence is located within Gates of the Arctic National Park.
Cobb, E.H., 1972, Metallic mineral resources map of the Wiseman quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-469, 1 sheet, scale 1:250,000
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 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.
Dillon, J.T., Cathrall, J.B., and Moorman, M.A., 1981, Geochemical reconnaissance of the southwest Wiseman quadrangle-summary of data on rock samples: Alaska Division of Geological and Geophysical Surveys Open-File Report 133B, 164 p.
|Reporters||J.M. Britton (Anchorage)|
|Last report date||8/9/2002|