Oshetna River Prospect, Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Oshetna River Prospect | Prospect |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 21' 54'' North , 147° 29' 41'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
MAS/MIL number 20760055.
Location: This placer prospect and the mining claims on it are on the Oshetna River, upstream from the mouth of the Little Oshetna R River . It is on the east side of sec. 1, T. 26N., R. 10 E., Seward Meridian. The location is accurate to within 1/2 mile.
Geology: The upper part of the Oshetna River drains an area of Tertiary volcanic rocks and remnants of Quaternary landslides and glacial deposits (Kurtak and others, 1992). Near Roaring Creek, the rocks includes Tertiary fluviatile conglomerate; below Roaring Creek, the rocks includes volcanic rocks, sandstone, and argillite of the Jurassic, Talkeetna Formation. The river contains extensive gravel deposits 100 to 1000 feet wide and 10 to 40 feet thick (Kurtak and others, 1992). The gradient of the river is 20 to 130 feet per mile. Gold occurs in the alluvial gravel deposits. Stream-sediment samples collected by the U.S. Bureau of Mines contain 2.2 parts per million gold (Balen, 1990).
Workings: Placer claims were staked in 1973. The Bureau of Mines sampled the gravel in the river (Balen, 1990).
Age: Quaternary placer.
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: | TK110 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Copper River BasinBasin
- Peninsular-Talkeetna DomainDomain
- Peninsular TerraneVolcanic Arc
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