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Nakoa Lode

Prospect, Inactive

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Commodities and mineralogy

Main commodities Ag; Au
Other commodities Pb
Ore minerals galena; gold; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale C-7
Latitude 60.5218
Longitude -149.6067
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is at an elevation of 650 feet, in the SE1/4 section 15, T. 5 N., R. 2 W., of the Seward Meridian. It is situated on the south side of Daves Creek, approximately 1.5 miles west of the junction of the Seward and Sterling Highways. This is location S-242 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

This deposit consists of a quartz-sulfide vein as much as 4 feet wide and traceable along strike for 300 feet (Jansons and others, 1984). No strike direction is given for the vein. The host is slate of the Valdez Group of Late Cretaceous age (Nelson and others, 1985). The foliation of the slate strikes N12E and dips vertically. The quartz contains slate fragments along with pyrite and minor galena (Jansons and others, 1984).
The U.S. Bureau of Mines collected three samples of the vein in 1979 but detected no gold or silver. Chip samples, provided by the claim owners, assayed only traces of gold and silver (Jansons, 1981). The claim owners (in 1979) reported assays 56 ounces of silver per ton (Jansons and others, 1984).
Geologic map unit (-149.608854159999, 60.5212300325078)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Cretaceous or younger; the veins cut rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration The workings on this prospect consist of stripping and prospect pits. Improvements include an old cabin. The U.S. Bureau of Mines collected three samples of the vein in 1979 but detected no gold or silver. Chip samples, provided by the claim owners, assayed only traces of gold and silver (Jansons, 1981). The claim owners (in 1979) reported assays of 56 ounces of silver per ton (Jansons and others, 1984).
Indication of production None

Additional comments

No reference to this prospect was found in the literature. However, local residents report that prospecting on the claims occurred prior to construction of the new Seward Highway (before 1955) (Hoekzema and Sherman, 1983).

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, 1981, 1979 Bureau of Mines sample sites and analytical results for samples collected in the Chugach National Forest, southcentral Alaska: U.S. Bureau of Mines Open File Report 83-81, 229 p. 5 sheets.
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.
Reporters Jeff A. Huber (Anchorage)
Last report date 3/5/2000