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Grogg Creek Prospect, Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Grogg Creek Prospect | Prospect |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 12' 20'' North , 147° 6' 46'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: This gold placer prospect is along Gregg Creek, a tributary to upper Valdez Creek. The map site is near the head of Gregg Creek, in the S1/2 of sec. 2, T. 20 S., R. 3 E., of the Fairbanks Meridian. This location is accurate to with 200 feet.
Geology: Grogg Creek drains an area underlain by pelitic schists and small intrusions of intermediate composition. The creel flows over glacio-fluvial gravels, but none of the workings has exposed the deeper gravels. Gold in small concentrations occurs throughout the extent of the creek and there have been many small-scale, hand-mining operations.
Workings: There are many indications of small scale mining, both past and recent, on Grogg Creek. All operations appear to have been limited to near-surface gravels, and operations were apparently conducted without the benefit of any drilling (D.L. Stevens, personal observations).
Age: Probably the same age as the White Creek gravels (HE205); ie., younger than the paleochannels on lower Valdez Creek (HE194).
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: | HE213 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Chulitna-Broad Pass DomainDomain
- Yukon-TananaVolcanic Arc
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