|Quadrangle map, 1:250,000-scale||LG|
|Quadrangle map, 1:63,360-scale||A-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Cobb (1972, MF-413), loc. 41; SW1/4NE1/4 sec. 30, T. 3 N., R. 2 E., of the Fairbanks Meridian. This prospect is west of the junction of Tamarack and Chatham Creeks, at an elevation of 1,650 feet. Accuracy is within 1,500 feet.|
Geologic descriptionA 60-foot adit was driven on a northwest striking, southwest dipping shear zone which varied from 12 to 14 inches thick and contained abundant galena. The ore contained $79.58 per ton in gold and silver (equivalent to about 3.8 ounces of gold per ton) and significant values in lead (Times Publishing Company, 1912). Smith (1913, B 525) reported that the Bobbie shear zone trends nearly north-south with a west dip and consists of banded galena with stibnite as the main components. Galena crystals near the wall rock grade into the center of the sulfide vein where coarse euhedral galena occurs. Brooks (1916, B 649) noted that stibnite occurred as kidney-shaped masses with euhedral quartz crystals; minor pyrite was embedded in the stibnite. The Bobbie prospect was examined as a possible source of antimony in 1942 but no additional exploration was conducted due to insufficient tonnage potential (Killeen and Mertie, 1951).
|Geologic map unit||(-147.419447480082, 65.0605770108465)|
|Mineral deposit model||Polymetallic vein (Cox and Singer, 1986; model 22c).|
|Mineral deposit model number||22c|
|Workings or exploration||A 60-foot adit was been driven on a northwest striking, southwest dipping shear zone. The ore contained $79.58 per ton in gold and silver (equivalent to about 3.8 ounces of gold per ton) and significant values in lead (Times Publishing Company, 1912).|
|Indication of production||None|
Brooks, A.H., 1916, Mineral resources of Alaska, report on progress of investigations in 1915: U.S. Geological Survey Bulletin 642, 279 p.
Chapman, R.M., and Foster, R.L., 1969, Lode mines and prospects in the Fairbanks district, Alaska: U.S. Geological Survey Professional Paper 625-D, 25 p., 1 plate.
Cobb, E.H., 1972, Metallic mineral resources map of the Livengood quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-413, 2 sheets, scale 1:250,000.
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Livengood quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-819, 241 p.
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.)
Killeen, P.L., and Mertie, J.B., 1951, Antimony ore in the Fairbanks District, Alaska: U.S. Geological Survey Open-File Report 51-46, 43 p.
Smith, P.S., 1913, Lode mining near Fairbanks, in Prindle, L.M., A geologic reconnaissance of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Bulletin 525, p. 153-216.
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|