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Crevice Creek Mine, Kantishna Mining District, Denali Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Crevice Creek Mine | Mine |
| Kantishna Mining District | Mining District |
| Denali Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 36' 5'' North , 150° 45' 20'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Crevice Creek is in Denali National Park and Preserve.
Location: 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).
Geology: 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.
Workings: 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.
Age: Holocene.
Production: Probable production of 500 to 750 ounces of gold (Levell, 1984, v. 2; Cobb, 1980 [OFR 80-363]).
Reserves: 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).
Commodities (Major) - Au
Development Status: Yes; small
Deposit Model: Au-PGE placer deposit (Cox and Singer, 1986; model 39a).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | MM046 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- North America PlatformPassive Margin
- Yukon-Tanana lower DomainDomain
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