Gold Stamp Mining Co.

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Cu; Pb; Zn
Ore minerals arsenopyrite; galena; gold; pyrite; sphalerite; unknown copper mineral
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-7
Latitude 60.881
Longitude -149.5287
Nearby scientific data Find additional scientific data near this location
Location and accuracy This mine is located in the SW1/4 section 7, T. 9 N., R. 1 W., of the Seward Meridian. It is situated on Bear Creek at an elevation of 2,200 feet. This is location 5 of Cobb and Richter (1972), location 5 of MacKevett and Holloway (1977), location 10 of Cobb and Tysdal (1980), and location S-301 of Jansons and others (1984). The location is accurate to within 300 feet.

Geologic setting

Geologic description

The deposit at this mine consists of an auriferous, sulfide-bearing, quartz-calcite vein as much as about 16 inches thick. The vein is hosted in sandstone of the Valdez Group of Late Cretaceous age and Eocene(?) felsic dikes (Cobb and Tysdal, 1980). The vein contains arsenopyrite, pyrite, galena, sphalerite, an unknown copper mineral, and gold.
Workings consist of a 30-foot-deep flooded shaft and a 6-foot adit about 625 feet west of the shaft (Hoekzema and Sherman, 1983).
Geologic map unit (-149.530873435657, 60.8804399405856)
Mineral deposit model Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Eocene(?) or younger; the vein cuts Eocene(?) felsic dikes.
Alteration of deposit Both the dikes and sandstone show sericitic alteration (Cobb and Tysdal, 1980).

Production and reserves

Workings or exploration
The workings consist of a 30-foot shaft with a small drift that filled with water during mining and a 6-foot adit about 625 feet west of the shaft. A five-stamp mill was erected between 1912 and 1914, but not enough ore was found and the mill was removed (Tuck, 1933).
The U.S. Bureau of Mines sampled the dump of the mine in 1981 (Hoekzema and Sherman, 1983); the two grab samples they collected contained 6.2 ppm and 0.86 ppm gold and 24.7 and 1.7 ppm silver.
Indication of production Yes; small
Production notes No recorded production (Jansons and others, 1984).

References

MRDS Number A010396

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 3/9/2000