Crevice Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale MM
Quadrangle map, 1:63,360-scale C-2
Latitude 63.6014
Longitude -150.7559
Nearby scientific data Find additional scientific data near this location
Location and accuracy Crevice Creek (Cobb, 1980 [OFR 80-363]) is a two-mile-long, northwest-flowing tributary to Caribou Creek. It rises below Spuce Peak. For this record, the location of the Crevice Creek placer is near the center of section 24, T. 15 S., R. 16 W., Fairbanks Meridian. Crevice Creek is location 54 of Cobb (1972 [MF 366]). It is Alaska Kardex location 66-58 (Heiner and Porter, 1972; Hawley and Associates, 1978), and is resource block CR-1 of Thornsberry, McKee, and Salisbury (1984, fig. K-3).

Geologic setting

Geologic description

Crevice Creek is steep, having a gradient of more than 500 feet per mile. It flows in a bedrock valley on Birch Creek Schist. Its steep upper valley is cut into rocks of the Spruce Creek sequence, and a regional fault that strikes northwest controls its upper course (Thornsberry, McKee, and Salisbury, 1984, fig. K-2; Bundtzen, 1981). Several lode mineral occurrences, including MM053 and MM057, are in the headwaters of Crevice Creek (Hawley and Associates, 1978, fig. 4.1-A(1)).
The creek was mined by hand in the early 1900s. Rough, coarse gold was recovered, including a 4 or 5 ounce nugget (Prindle, 1907). About one-third of the creek appears to have been hand mined, and there appears to have been some mining as recently as 1946-47 (Levell, 1984, v. 2, table A-6). Test samples 0.1 cubic yard in size collected in 1983 contained 0.0018 to 0.1249 ounce of gold per cubic yard (Levell, 1984, v. 2). There is a resource of about 100,000 cubic yards of alluvial gravel in the valley that could contain placer gold.
Geologic map unit (-150.758187679229, 63.6008980751765)
Mineral deposit model Au-PGE placer deposit (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Holocene.

Production and reserves

Workings or exploration Placer gold was discovered in Crevice Creek early in the history of the Kantishna district. It was mined fairly extensively by hand in 1906, and some mining could have occurred as recently as 1946 and 1947.
Indication of production Yes; small
Reserve estimates About 100,000 cubic yards of alluvium that could grade about 0.03 to 0.1 ounce of gold per cubic yard (Levell, 1984, v. 2).
Production notes Probable production of 500 to 750 ounces of gold (Levell, 1984, v. 2; Cobb, 1980 [OFR 80-363]).

Additional comments

Crevice Creek is in Denali National Park and Preserve.

References

MRDS Number A011266

References

Bundtzen, T.K., 1981, Geology and mineral deposits of the Kantishna Hills, Mt. McKinley quadrangle, Alaska: M. S. Thesis, University of Alaska, College, Alaska, 238 p.
Heiner, L.E., and Porter, Eve, 1972, Alaska Mineral Properties, volume 2: University of Alaska, Mineral Industry Research Laboratory Report 24, 669 p.
Reporters C.C. Hawley
Last report date 4/19/2001