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Lyon Creek

Prospect, Probably inactive

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Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-6
Latitude 60.7752
Longitude -149.2103
Nearby scientific data Find additional scientific data near this location
Location and accuracy Lyon Creek is located in T. 8 N., R. 1 E., of the Seward Meridian. It flows northwest into Tincan Creek, a tributary of Granite Creek. Evidence of prospecting can be seen near the mouth of the canyon. This is location P-66 of Jansons and others (1984). This location is accurate to within 300 feet.

Geologic setting

Geologic description

Bedrock in the area is slate and graywacke of the Valdez Group of Late Cretaceous age (Nelson and others, 1985). Lyon Creek occupies a narrow, steep, bedrock gorge and flows onto an alluvial fan that coalesces with that formed by Tincan Creek. Alluvial gravels thinly mantle bedrock in the lowermost part of the canyon. Fairly coarse gold, as much as three-sixteenths of an inch in diameter, was recovered on bedrock (Jansons and others, 1984). Channel gravels are very limited in quantity.
Geologic map unit (-149.212448903608, 60.7746310414063)
Mineral deposit model Placer Au (alluvial) (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Jansons and others (1984) reported evidence of prospecting near the mouth of Lyons Creek canyon, but they did not describe the nature of the prospecting. The U.S. Bureau of Mines sampled Lyon Creek in 1982 or 1983 with a small suction dredge. The sample yielded 0.0132 ounce of gold per hour. Fairly coarse gold, as much as three-sixteenths of an inch, was recovered on bedrock.
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.
Reporters Jeff A. Huber (Anchorage)
Last report date 6/25/2000