Teddy Bear

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Other commodities Cu; Pb; Zn
Ore minerals arsenopyrite; chalcopyrite; galena; gold; sphalerite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-7
Latitude 60.7807
Longitude -149.5359
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is located in the SE1/4 section 13, T. 8 N., R. 2 W., of the Seward Meridian It is at an elevation of 3,200 feet, just north of a small lake and about a mile northeast of the Hirshey-Lucky Strike mine (SR011). This is location 11 of Cobb and Richter, (1972), location 10 of MacKevett and Holloway (1977), location 23 of Cobb and Tysdal (1980), and location S-290 of Jansons and others (1984). The location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The deposit is in a fractured Eocene(?) felsic dike that strikes N15E and dips 65SE. Fractures in the dike are filled with quartz-calcite veins containing arsenopyrite, chalcopyrite, galena, sphalerite, and minor gold. In some parts of the dike, quartz may be absent; in other parts it may constitute as much as 30 percent of the dike. The width of the dike varies from 1 to 8 feet. It averages 2.5 feet wide and is traceable for as much as 4 miles along strike (Tuck, 1933). The dike is commonly offset by right-lateral transverse faults having typical displacements of less than 20 feet. The dike is hosted by slate and graywacke of the Upper Cretaceous Valdez Group (Tysdal, 1978 [MF-880-A]).
Geologic map unit (-149.538057380938, 60.7801237041963)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Eocene or younger; the dike is probably Eocene in age.

Production and reserves

Workings or exploration
The workings on this prospect consist of a single adit that is 65 feet long and surface trenching. There are no buildings or equipment of any kind on the property (Tuck, 1933). Tuck (1933) collected five channel samples across the dike in what appeared to be the most promising parts. These samples assayed only traces of gold and silver. Nevertheless, Tuck (1933) reported that small flakes of free gold could commonly be seen in the vein material in the dike.
The U.S. Bureau of Mines collected a chip sample and a grab sample of the dike in 1982. The chip sample assayed a trace of gold and silver. The grab sample assayed 0.117 ounce of gold per ton and 0.2 ounce of silver per ton (Jansons and others, 1984). The Bureau suggested that large reserves are possible but that the grade appears to be less than 0.05 ounce of gold per ton.
Indication of production None
Reserve estimates The U.S. Bureau of Mines speculated that large reserves are possible but that the grade appears to be less than 0.05 ounce of gold per ton (Hoekzema and Sherman, 1983).

References

MRDS Number A010554

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 4/29/2000