Black Gulch Mine, Kougarok Mining District, Nome Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Black Gulch Mine | Mine |
| Kougarok Mining District | Mining District |
| Nome Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 31' 19'' North , 164° 12' 7'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: Black Gulch is a small north tributary to Noxapaga River. Grouse Creek (BN017) is 4,000 feet to the west and Buzzard Creek (BN019) is 1,500 feet to the east of Black Gulch. The location of placer workings on this creek is approximate but the stream is only about 3,000 feet long. This is locality 50 of Cobb (1972; MF 417; 1975; OFR 75-429).
Geology: Gold was discovered soon after the turn of the century on tributaries to the Noxapaga River including Black Gulch (Collier and others, 1908) and mining took place here after WW II (Hopkins, 1963; Cobb, 1975, OFR 75-429). Frozen, stratified peat and silt (muck), 20 to 30 feet-thick, commonly overlies a few feet of auriferous gravel on schist bedrock in the general area (Hopkins, 1963, Figure 8, p. 94). Muck locally contains bones of extinct Pleistocene mammals. Although tundra cover of bedrock is extensive in the area (Till and others, 1986), Hopkins (1963) indicates that quartz-calcite veins are common in schist bedrock of the gold- producing tributaries to the Noxapaga River.
Workings: Surface open-cut placer mining, including dozer and sluice operations, took place on this creek.
Age: Quaternary; an early radiocarbon age on shallow parts of the frozen and stratifed peat and silt of Black Gulch was 8,800 +/- 200 years (Hopkins, 1963, Figure 8). The thin gold-bearing gravels on bedrock here were many feet stratigraphically below the radiocarbon dated deposits.
Production: Although gold was discovered here at least by 1906 (Brooks, 1907), significant mining seems to have taken place just before WW II (Smith, 1939 (B 910A); 1939 (B917A); 1941) and after (Hopkins (1963).
Commodities (Major) - Au
Development Status: Yes; small
Deposit Model: Placer Au-PGE (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: | BN018 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Brooks-Seward DomainDomain
- Nome ComplexAccretionary Complex
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