Unnamed (along Kougarok River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold
Gangue minerals pyrite; quartz

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale C-6
Latitude 65.68
Longitude -164.798
Nearby scientific data Find additional scientific data near this location
Location and accuracy This location is for bedrock exposures in old placer workings on the west side of the former cummunity of Taylor. Taylor is located at the end of the Nome-Taylor road, on the west bank of Kougarok River, about 1,000 feet south of the mouth of Taylor Creek. This is locality 6 of Gamble (1988)

Geologic setting

Geologic description

Graphitic metasedimentary rocks, exposed in old placer workings, contain numerous hydrothermally altered zones with fractured quartz veinlets and abundant pyrite (Sainsbury and others, 1969, p. 30). A sample of ribbon quartz contained 200 ppm As and a pyrite-rich pan concentrate from the altered zones contained 1.3 ppm Au, 2 ppm Ag, greater than 10,000 ppm As, 750 ppb Hg, 200 ppm Co, and weakly elevated base metals (Sainsbury and others, 1969, p. 39).
Geologic map unit (-164.800696014991, 65.6792753076603)
Mineral deposit model Gold-bearing quartz veins and schist?
Age of mineralization Unknown but possibly Cretaceous; if gold-bearing lode structures are present here they may be similar in age to some lode gold deposits of southern Seward Peninsula. The southern Seward Peninsula lode gold deposits formed as a result of mid-Cretaceous metamorphism (Apodoca, 1994; Ford, 1993, Ford and Snee, 1996; Goldfarb and others, 1997) that accompanied regional extension (Miller and Hudson, 1991) and crustal melting (Hudson, 1994). This higher temperature metamorphism was superimposed on high pressure/low temperature metamorphic rocks of the region.
Alteration of deposit Quartz veining and possibly clay alteration appear to be present.

Production and reserves

Workings or exploration The only workings here are from placer mining, including those from dragline operations.
Indication of production None

References

MRDS Number 10307265

References

Apodoca, L.E., 1994, Genesis of lode gold deposits of the Rock Creek area, Nome mining district, Seward Peninsula, Alaska: Boulder, Colorado, University of Colorado, Ph.D. dissertation, 208 p.
Ford, R.C., 1993, Geology, geochemistry, and age of gold lodes at Bluff and Mt. Distin, Seward Peninsula, Alaska: Golden, Colorado School of Mines, Ph.D. dissertation, 302 p.
Ford, R.C., and Snee, L.W., 1996, 40Ar/39Ar thermochronology of white mica from the Nome district, Alaska--The first ages of lode sources to placer gold deposits in the Seward Peninsula: Economic Geology, v. 91, p. 213-220.
Goldfarb, R.J., Miller, L.D., Leach, D.L., and Snee, L.W, 1997, Gold deposits in metamorphic rocks in Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 151-190.
Hudson, T.L., 1994, Crustal melting events in Alaska, in Plafker, G., and Berg, H. C., eds., The Geology of Alaska: Geological Society of America, DNAG, The Geology of North America, Vol. G-1, p. 657-670.
Reporters Travis L. Hudson (Applied Geology)
Last report date 3/15/1999