Golden Eagle

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag
Ore minerals gold; pyrrhotite
Gangue minerals calcite; chlorite; quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-3
Latitude 60.9596
Longitude -147.9757
Nearby scientific data Find additional scientific data near this location
Location and accuracy The mine is located in the NE1/4 section 14, T. 10 N., R. 8 E., of the Seward Meridian. This is southwest of Davis Lake about half a mile southeast of the abandoned mining camp at Golden. The mill is just above the lake, and the workings are between 500 and 600 feet elevation. This is location 109 of Condon and Cass (1958), location 74 of Cobb and Richter (1972), location 100 of MacKevett and Holloway (1977), location 160 of Cobb and Tysdal (1980), and location S-129 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The deposit at the Golden Eagle mine consists of stringers and lenses of sulfide-bearing quartz as much as 10 feet wide in a shear zone that is traceable for 400 to 500 feet (Johnson, 1914 [B 592-G, p. 224]). The principal sulfide is pyrrhotite, and the quartz is accompanied by calcite and chlorite. The host rock is slate and sandstone of the Valdez Group of Late Cretaceous age (Cobb and Tysdal, 1980). The shear strikes S20W and dips vertically.
Workings consist of a 155-foot drift at 500 feet elevation, two 50- to 60-foot stopes, and a 60-foot crosscut. There is also a 45-foot drift at 600 feet elevation (Hoekzema and Sherman, 1983). Improvements include a five-stamp Vulcan Iron Works mill (Hoekzema and Sherman, 1983).
Assay results range from nil to $175 in gold per ton; a chip sample from the mouth of the tunnel assayed $9.20 of gold per ton (gold at $20.67 per ounce) (Johnson, 1914 [B 592-G, p. 224]). The U.S. Bureau of Mines sampled this deposit in 1979, and five chip samples from the workings contained 0 to 2.1 ppm gold (Hoekzema and Sherman, 1983).
Geologic map unit (-147.977750724266, 60.9590287568697)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Late Cretaceous or younger; the veins cut rocks of the Valdez Group of Late Cretaceous age.

Production and reserves

Workings or exploration
The deposit was discovered in the early 1900s, when a one-ton, gold-bearing quartz boulder was found downslope from the lode. This boulder was broken up and shipped to Valdez; it contained $42.00 worth of gold (gold at $20.67 per ounce) (Johnson, 1914 [B 592-G, p. 224]).
The mine workings consist of a 155-foot drift at 500 feet elevation, two 50- to 60-foot stopes, and a 60-foot crosscut. There is also a 45-foot adit at 600 feet elevation (Hoekzema and Sherman, 1983). Improvements include a five-stamp Vulcan Iron Works mill (Hoekzema and Sherman, 1983).
Assay results range from nil to $175 per ton; a chip sample from the mouth of the tunnel contained $9.20 of gold per ton (Johnson, 1914 [B 592-G, p. 224]). The U.S. Bureau of Mines sampled this prospect in 1979, and five chip samples from the workings contained 0 to 2.1 ppm gold (Hoekzema and Sherman, 1983).
Indication of production Yes; small
Reserve estimates The U.S. Bureau of Mines estimated a resource of 21,000 tons of ore at a grade of 0.1 ounce of gold per ton (Hoekzema and Sherman, 1983).
Production notes Recorded production is 28 ounces of gold and 1 ounce of silver. The U.S. Bureau of Mines estimated a resource of 21,000 tons of ore at a grade of 0.1 ounce of gold per ton (Hoekzema and Sherman, 1983).

References

MRDS Number A010391

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.
Reporters Jeff A. Huber (Anchorage)
Last report date 1/3/2000