Boulder Creek Mine, Goodnews Bay, Bethel Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Boulder Creek Mine | Mine |
| Goodnews Bay | City |
| Bethel Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
58° 56' 23'' North , 161° 42' 36'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Goodnews Bay | 256 (2017) | 21.1km |
Location: Boulder Creek is a west tributary to Salmon River with headwaters on the east side of Red Mountain. The Platinum to Goodnews Bay Mining Camp road crosses Boulder Creek very near its confluence with Salmon River. The map site is about 1/4 mile upstream of the road crossing. This is location 8 of Cobb (1972 [MF 362]; 1980 [OF 80-909]).
Geology: Boulder Creek is one of several creeks that have headwaters on the east side of the Red Mountain ultramafic pluton. It is about 1 mile long and heads against the summit of Red Mountain. Some placer mining of PGMs has taken place on Boulder Creek, probably along its lower part near Salmon River, but little information about this placer has been made public (Mertie, 1976; Cobb, 1980 [OF 80-909]). A Defense Minerals Exploration Administration contract funded drilling of 50 exploration holes in alluvium along the east side of Red Mountain between Last Chance and Dowry Creeks in 1953. The depths of these drill holes ranged from 5 to 51 feet and the PGM content ranged from 0 to 0.0085 ounce of PGM per cubic yard. The highest values in these holes were on Boulder Creek, where the average PGM content of 8 drill holes was 0.0024 ounce per cubic yard (Fechner, 1988, p. 80). Mertie (1976) reports that PGM recovered from Boulder Creek contained (recomputed free of impurities): 77.99 percent Pt, 16.28 percent Ir, 3.41 percent Os, 0.25 percent Ru, 1.31 percent Rh, 0.21 percent Pd, and 0.55 percent Au.
Workings: Some small-scale placer workings are inferred to be present on Boulder Creek, probably along its lower part near Salmon River. A Defense Minerals Exploration Administration contract funded drilling of 50 exploration holes in alluvium along the east side of Red Mountain between Last Chance and Dowry Creeks in 1953. The depths of these drill holes ranged from 5 to 51 feet and the PGM content ranged from 0 to 0.0085 ounce of PGM per cubic yard. The highest values in these holes were on Boulder Creek, where the average PGM content of 8 drill holes was 0.0024 ounce per cubic yard (Fechner, 1988, p. 80).
Age: Quaternary.
Commodities (Major) - PGM; (Minor) - Au
Development Status: Yes; small
Deposit Model: Placer PGE-Au (Cox and Singer, 1986; model 39b)
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
2 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| ⓘ | Platinum | 1.AF.10 | Pt |
Other Databases
| Link to USGS - Alaska: | HG026 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Koyukuk ArcsVolcanic Arc
- Walrus-Goodnews DomainDomain
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