Lynx Creek

Mine, Active?

Commodities and mineralogy

Main commodities Au
Other commodities Cu
Ore minerals copper; gold

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale C-7
Latitude 60.7098
Longitude -149.2917
Nearby scientific data Find additional scientific data near this location
Location and accuracy Lynx Creek, a north-flowing tributary of East Fork Sixmile Creek, is located in sections 9, 16, 17, and 20, T. 7 N., R. 1 E., of the Seward Meridian. The placered ground extends from the mouth of Lynx Creek upstream for about 1.5 miles. This is location 147 of Cobb and Richter (1972), location 170 of MacKevett and Holloway (1977), location 20 of Cobb and Tysdal (1980), and location P-61 of Jansons and others (1984). This location is accurate to within 300 feet.

Geologic setting

Geologic description

Lynx Creek drains an area underlain by sedimentary rocks of the Valdez Group of Late Cretaceous age and by mafic dikes that intrude the strata (Nelson and others, 1985). For most of its length, Lynx Creek flows in a steep, narrow canyon filled with glacial till, glacial-fluvial gravels, and avalanche debris. Placer gold occurs in both the main channel and in benches. The deposits consist of poorly stratified and sorted, partly cemented gravels. Most of the production has come from the lower 15 feet of gravel that rests on bedrock, although gold also occurs near the mouth of the creek (Janson and others, 1984). Along with gold, native copper nuggets have been found in this creek. Production has totaled 7,692 ounces of gold (Cobb and Tysdal, 1980).
Geologic map unit (-149.293840558534, 60.7092292090831)
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 Mining methods have included pick and shovel along with both hydraulic and mechanical operations. In 1905-06, a 600-foot-long underground timbered tunnel was driven from East Fork Sixmile Creek to the upper part of Lynx Creek. From there, the gravel was dumped into a 25-foot shaft, run through sluice boxes in the tunnel, and the tails deposited into East Fork Sixmile Creek (Paige and Knopf, 1907). Hydraulic mining began in 1915 and continued sporadically until 1980 (Jansons and others, 1984). Small-scale suction dredgers are currently (2000) working this creek ( C. S. Huber, oral communication, 2000).
Indication of production Yes; medium
Reserve estimates The U.S. Bureau of Mines estimated 5,000 cubic yards of gold-bearing gravels having a grade of 0.015 to 0.02 ounce of gold per yard (Jansons and others, 1984).
Production notes Total gold production through 1980 is estimated at 7,692 ounces of gold (Cobb and Tysdal, 1980). Production from 1975 to 2000 is estimated at less than 200 ounces (C. S. Huber, oral communication, 2000).

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.
Smith, S.S., 1917, The mining industry in the Territory of Alaska during the calendar year 1915: U.S. Bureau of Mines Bulletin 142, 65 p.
Reporters Jeff A. Huber (Anchorage)
Last report date 4/10/2000