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Helpmejack Creek Occurrence, Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Helpmejack Creek Occurrence | Occurrence |
| Koyukuk Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
66° 59' 54'' North , 153° 31' 58'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: This placer occurrence is located on Helpmejack Creek but its exact location is not known. The site is arbitrarily plotted 2.2 miles north of the northernmost of the Helpmejack Lakes in the SE1/4 section 35, T. 19 N., R 24 E. of the Kateel River Meridian.
Geology: Mendenhall (1902) reports that colors of gold had been found on Helpmejack Creek, but that none of the prospects were rich enough to justify much time or money. In this area, the creek cuts across mafic volcanic rocks and phyllite that range in age from Devonian(?) to Cretaceous or Jurassic(?) (Patton and Miller, 1966). A recent, panned-concentrate sample from the creek contains 54 ppb Au, but no visible gold (Kurtak and others, 1999). No other information is available.
Workings: Prospecting, including sinking of shafts.
Age: Quaternary.
Commodities (Major) - Au
Development Status: None
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.
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: | HU004 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Angayucham TerraneAccretionary Complex
- Brooks Range DomainVolcanic Arc
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