Corkscrew Creek Occurrence, Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Corkscrew Creek Occurrence | Occurrence |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 1' 37'' North , 146° 59' 34'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
The gold content of a placer sample in not significant, and there is low potential for commercial recovery of placer gold (Kurtak and others, 1992).
Location: This placer location is at an elevation of about 2,850 feet in Corkscrew Creek, a south-flowing tributary of Clearwater Creek. The occurrence is on Corkscrew Creek about 0.9 mile above its confluence with Clearwater Creek, in the NW1/4 section 9, T. 22 S., R. 4 E., Fairbanks Meridian The occurrence corresponds to placer locality A35 of Kurtak and others (1992).
Geology: Corkscrew Creek flows on glaciofluvial material of Pleistocene and Holocene age. The creek was sampled at one site (Kurtak and others, 1992, table 32); sample 1192 indicated a recoverable gold content of only 0.00013 ounce of gold per cubic yard. The concentrate sample also contained 0.5 part per million (ppm) silver, 48 ppm mercury, and 20 ppm tungsten. It appears likely that this deposit represents material reconcentrated from very low grade glaciofluvial material.
Workings: Two placer claims were staked on Corkscrew Creek in 1974 (Kurtak and others, 1992).
Age: Holocene.
Commodities (Major) - Au; (Minor) - Ag, Hg
Development Status: None
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a). Gold is probably reconcentrated fr
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: | MH069 |
|---|
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