Cripple Creek (lower)

Mine, Undetermined

Commodities and mineralogy

Main commodities Au
Ore minerals gold; magnetite

Geographic location

Quadrangle map, 1:250,000-scale BH
Quadrangle map, 1:63,360-scale C-2
Latitude 60.74
Longitude -159.57
Nearby scientific data Find additional scientific data near this location
Location and accuracy Cripple Creek is a southeast headwater tributary of the Salmon River. This placer mine is one of two locations given by Cobb (1972 [MF 455]) on Cripple Creek. It is along about 1 mile of the lower creek between the mouths of Porcupine and Dome Creeks, both west tributaries to Cripple Creek. The map site is at the approximate midpoint of the placer, in the SW1/4 of section 36, T. 8 N., R. 59 W., of the Seward Meridian. This is locality 16 of Cobb (1972 [MF 455]) and of Hoare and Cobb (1977).

Geologic setting

Geologic description

Cripple Creek was prospected and staked soon after placer gold was discovered on Marvel Creek (BH010) in 1911. The headwaters of Cripple Creek have coarse outwash or morainal deposits, and a glacier occupied the headwater valley of Loco Creek, a west tributary. Most of the Cripple Creek drainage is filled with alluvial outwash deposits. These have been incised by the present drainage that cuts 10 to 30 feet into bedrock along the lower reaches of the creek. Placer mining along Cripple Creek below the mouth of Dome Creek, has taken place over at least a mile of the creek and seems restricted to the active flood plain (Cobb, 1972 [MF 455]). The flood plain gravels are about 6 feet thick and some of the pay is reported to have run about 0.003 ounce of gold per cubic yard (Hoare and Cobb, 1977, p. 9). The gold is fine and flaky and accompanied by much magnetite. Maddren (1915) reports that bench-placer gold prospects are present on lower Dome Creek near its confluence with Cripple Creek. The bench alluvium is up to 100 feet thick. Early tunneling along the bedrock base of the benches indicated that gold was concentrated on bedrock (Maddren, 1915, p. 349). Hoare and Cobb (1977, p. 9) report that bench deposits have comparable gold content to flood plain deposits in some areas. Bedrock in the headwaters of Cripple Creek and Loco Creek include a Lower Tertiary granitic stock and a rhyolite intrusive (?) in mid-Cretaceous sedimentary rocks of the Kuskokwim Group (Box and others, 1993).
Geologic map unit (-159.572273646348, 60.7392693837522)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Several tunnels up to 60 feet long were dug into bench gravels above bedrock. They are on the west side of Cripple Creek, 2.5 miles upstream from its mouth, where the stream is incised 10 to 15 feet into bedrock (Maddren, 1915). Cobb (1972 [MF 455]) shows about a mile of placer workings along this part of Cripple Creek.
Indication of production Yes; small

References

MRDS Number A013396
Reporters Travis L. Hudson
Last report date 3/24/2001