Grubstake Bar Mine, Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Grubstake Bar Mine | Mine |
| Koyukuk Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
67° 0' 38'' North , 150° 25' 55'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: Grubstake Bar is described by Reed (1938) as being on the right limit of the South Fork, Koyukuk River about 2 miles above Hanshaw Bar (WI155) which is about 5.8 miles by river above Gold Bench (in the Bettles quadrangle). Maddren (1913) described the occurrence on the NW bank of South Fork about 9 miles above Gold Bench. The site is here plotted on a sand bar on the north bank of the South Fork, opposite the mouth of Bear Creek, in the northwest corner of section 9, T. 25 N., R. 13 W., of the Fairbanks Meridian. The location is accurate within one mile.
Geology: Maddren (1913) described Grubstake Bar as a low-bench deposit. Reed (1938) described it as a superficial deposit in the present river channel, similar to Hanshaw Bar (WI155).
Workings: Maddren (1913) reported that the deposit had been worked with sluice boxes in 1900-1901.
Age: Quaternary.
Production: About $4,000 in gold (about 200 ounces) was produced from 1900 to 1909 (Maddren, 1913).
Commodities (Major) - Au
Development Status: Yes; small
Deposit Model: Placer Au (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.
Gallery:
Other Databases
| Link to USGS - Alaska: | WI153 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Angayucham TerraneAccretionary Complex
- Ruby DomainDomain
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