Queen Gulch

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag; As; Hg; Sn
Ore minerals arsenopyrite; cassiterite; cinnabar; gold; magnetite
Gangue minerals garnet; zircon

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale A-5
Latitude 62.0587
Longitude -158.21522
Nearby scientific data Find additional scientific data near this location
Location and accuracy This placer mine is on Queen Gulch, a northwest-flowing tributary of Crooked Creek. The coordinates are near the mouth of the gulch, about 0.5 mile northwest of the center of section 26, T. 23 N., R. 49 W., of the Seward Meridian. The location is accurate. Queen Gulch is locality 18 of Cobb (1972 [MF 363]); also described in Cobb (1976 [OFR 76-576]).

Geologic setting

Geologic description

Queen Gulch is a 2-mile-long tributary of Crooked Creek. The placer deposit is near the intersection of Queen Gulch and the ancestral 'Donlin Creek' alluvial terrace that developed on the southeast flank of modern Donlin and Crooked Creeks. According to Cady and others (1955) and Bundtzen and Miller (1997), Donlin Creek flowed northeast into the Iditarod River. After regional tilting, the drainage reversed direction and Donlin and Crooked Creeks flowed into the Kuskokwim River. In Queen Gulch, low grade auriferous gravel deposits in the ancestral channel were reworked to form locally rich placer gold deposits. This ancestral bench is probably Late Tertiary in age.
The Queen Gulch deposit is about 0.6 mile long. The gravel in it varies from 15 to 65 feet thick. The distribution of the gold in the placer is erratic; some areas were completely barren while other were rich. The source of the placer gold is probably the Donlin Creek lode gold deposit (ID167), which is at the head of Queen Gulch (Miller and Bundtzen, 1994; Bundtzen and Miller, 1997). The principal heavy minerals identified in concentrates of from the mine include cinnabar, stibnite, arsenopyrite, garnet, magnetite, and trace amounts of cassiterite (Cobb, 1967 [OFR 76-576]; Bundtzen, Cox, and Veach, 1987). Production from Queen Gulch was combined with the production from Donlin Creek.
Geologic map unit (-158.21763031371, 62.0580068075013)
Mineral deposit model Placer Au deposit (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization The alluvium in modern Queen Gulch is probably Quaternary; the ancestral terrace is probably Late Tertiary.

Production and reserves

Workings or exploration The Queen Gulch placer deposit was discovered in 1910 (Maddren, 1911; Brooks, 1912). There has been some small scale, open-cut placer mining on Queen Gulch (Cobb, 1973).
Indication of production Yes; small
Reserve estimates None.
Production notes Production from Queen Gulch was combined with the production from Donlin Creek.

References

MRDS Number A015062

References

Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 242-286.
Bundtzen, T.K., Cox, B.C., and Veach, N.C., 1987, Heavy mineral provenance studies in the Iditarod and Innoko districts, western Alaska: Process Mineralogy VII, The Metallurgical Society, p. 221-246.
Reporters T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.), M.L. Miller (U.S. Geological Survey); and C.C. Hawley (Hawley Resource Group)
Last report date 5/26/2003