Alder Creek

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale LG
Quadrangle map, 1:63,360-scale A-1
Latitude 65.098
Longitude -147.223
Nearby scientific data Find additional scientific data near this location
Location and accuracy Cobb (1972, MF-413), loc. 52; SW1/4SW1/4 sec. 7, T. 3 N., R. 3 E., of the Fairbanks Meridian. This prospect is between the headwater forks of Alder Creek at an elevation of 2,100 feet. Accuracy is within 1,500 feet.

Geologic setting

Geologic description

Gold was found in a 12- to 13-foot-wide vertical shear zone striking N 40 E; it contained highly fractured quartz. Mineralization is along the margin of the vein and along fragments of schist in the vein (Prindle, 1910, p. 227).
The original prospect consisted of three claims: the Lemon, Lime and North Star claims (Prindle, 1910). By 1909, a 120-foot-long adit had been driven parallel to the shear and a cross-cut had intersected the shear zone approximately 50 feet below surface. Samples collected from the site panned $40 gold per ton in free gold (1.9 ounces of gold per ton); they were from the six-inch-wide, high grade portion of the shear. The remainder panned approximately $2 gold per ton in free gold (0.09 ounces of gold per ton) (Times Publishing Company, 1912). Two other parallel quartz-bearing shear zones were known to exist but had not been explored in 1909. Smith (1913, B 525) reported the prospect was inactive in 1912 by which time the adit was 150 feet long (Times Publishing Company, 1912). By 1913 the adit had been extended to 160 feet in length and several cross-cuts driven to explore the shear zone (Brook, 1914).
Geologic map unit (-147.225450155886, 65.0975815662587)
Mineral deposit model Auriferous quartz shear zone in schist.

Production and reserves

Workings or exploration Smith (1913, B 525) reported the prospect was inactive in 1912 when an adit was 150 feet long (Times Publishing Company, 1912). By 1913, the adit had been extended to 160 feet in length and several cross-cuts were driven to explore the shear zone (Brook, 1914).
Indication of production None

References

MRDS Number A015464

References

Freeman, C.J., 1992, 1991 Golden Summit project final report, volume 2: Historical summary of lode mines and prospects in the Golden Summit project area, Alaska: Avalon Development Corp., 159 p. (Report held by Freegold Recovery Inc. USA, Vancouver, British Columbia.)
Times Publishing Company, 1912, Tanana Magazine, Quartz Edition: Fairbanks, Alaska, Times Publishing Company, 76 p.
Reporters C.J. Freeman, J.R. Guidetti Schaefer (Avalon Development Corporation)
Last report date 5/4/1999