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  3. Alaska Resource Data File (ARDF)

Unnamed (north of Grant Lake)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Ag; Cu
Other commodities Co; Cr; Cu; Ni; V; Zn
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale B-6
Latitude 60.4895
Longitude -149.2199
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is located about three-quarters of a mile from the north side of Grant Lake at an elevation of about 3,000 feet. It is situated in the SE1/4 section 26, T. 5 N., R. 1 E., of the Seward Meridian. This is location 67 of Cobb and Tysdal (1980) and location S-229 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The occurrence consists of abundant thin quartz veins in a reddish-brown schist that is mapped as the Valdez Group of Late Cretaceous age (Tysdal, 1978 [MF-880A]). The veins are within a shear zone that may be associated with the Placer River fault system. A single grab sample contained 3 ppm silver, 1,000 ppm copper, 700 ppm vanadium, 500 ppm chrome, 300 ppm cobalt, 200 ppm zinc, and 100 ppm nickel (Tysdal, 1978 [MF-880-A]).
Geologic map unit (-149.222000804868, 60.4889114209861)
Age of mineralization Cretaceous or younger; the veins cut rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration A single grab sample contained 3 ppm silver, 1,000 ppm copper, 500 ppm chrome, 700 ppm vanadium, 300 ppm cobalt, and 200 ppm zinc (Tysdal, 1978 [MF-880-A]).
Indication of production None

References

References

Hoekzema, R.P., and Sherman, G.E., 1983, Mineral investigations in the Chugach National Forest, Alaska (Peninsula study area): U.S. Bureau of Mines in-house report; held at U.S. Bureau of Land Management Alaska State Office, Anchorage, 524 p.
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.
Tysdal, R.G., 1978, Mines, prospects, and occurrences map of the Seward and Blying Sound quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-880-A, 2 sheets, scale 1:250,000.
Reporters Jeff A. Huber and Carol S. Huber (Anchorage)
Last report date 1/30/2002