|Quadrangle map, 1:250,000-scale||CV|
|Quadrangle map, 1:63,360-scale||D-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Dead Creek prospect is at an elevation of about 3400 feet above the north forks of Dead Creek. It is in the S1/2 sec. 21, T. 11 S., R. 4 W., of the Copper River Meridian. The site is accurately located to within 2000 ft. This prospect is shown as site C-56 in Jansons and others (1984).|
The Dead Creek prospect is in Upper Cretaceous Valdez Group metasedimentary rocks (Nelson and others, 1985). The deposit consists of a 60-foot-wide shear zone containing a 10-foot-wide gossan that carries sulfide-bearing quartz veinlets (Jansons and others, 1984). Ore minerals include azurite, chalcopyrite, malachite, and sphalerite.Jansons and others (1984) report a 60-foot-long adit and one open pit. A chip sample contained: 91 ppm Cu, 0.8 ppm Ag, 140 ppm Zn; one grab sample contained: 8.9% Cu, 2.7 oz Ag/ton, and 0.31% Zn.
|Geologic map unit||(-145.951996009343, 60.8994771980881)|
|Mineral deposit model||Possibly polymetallic veins (Cox and Singer, 1986; model 22c)|
|Mineral deposit model number||22c ?|
|Alteration of deposit||Oxidation of iron and copper minerals.|
|Workings or exploration||Jansons and others (1984) report a 60-foot-long adit and one open pit. A chip sample contained: 91 ppm Cu, 0.8 ppm Ag, 140 ppm Zn; one grab sample contained: 8.9% Cu, 2.7 oz Ag/ton, and 0.31% Zn.|
|Indication of production||None|
Additional commentsSite examined as part of a U.S. Bureau of Mines and U.S.G.S. mineral resource evaluation of the Chugach National Forest (Jansons and others, 1984; Nelson and others, 1984).
Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, southcentral Alaska: U.S. Bureau of Mines Mineral Land Assessment 5-84, 218 p., 2 sheets, scale 1:250,000.
Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.
Nelson, S.W., Miller, M.L., Barnes, D.F., Dumoulin, J.A., Goldfarb, R.J., Koski, R.A., Mull, C.G., Pickthorn, W.J., Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral resource potential of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-A, 24 p., 1 plate, scale 1:250,000.
|Reporters||S.W. Nelson, Anchorage, AK|
|Last report date||6/10/2000|