Unnamed Occurrence (ARDF - TL067), Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TL067) | - not defined - |
| Yentna Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 31' 19'' North , 152° 2' 34'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: Reed and others (1978, locality 22) locate this occurrence at approximately 3800 feet in a tributary to the east fork of the Yentna River in the northwest quarter of Section 15, T. 28 N., R. 15 W., of the Seward Meridian in Denali National Park and Preserve.
Geology: Reed and others (1978) describe disseminated sulfide minerals (unidentified) in felsite dikes of the East Fork Yentna stock, a medium-grained, pyroxene-bearing biotite granite, that is one of the composite plutons (Tcp) of Reed and Nelson (1980). Maximum values of 2 ppb gold, 1 ppb palladium, and 5 ppb platinum from the East Fork stock are reported by Foley and others (1997).
Workings: Reconnaissance mapping, stream silt, pan concentrate and rock sampling by the U.S. Geological Survey (Reed and others, 1978; Reed and Nelson, 1980) are all that have been described here. Maximum values of 2 ppb gold, 1 ppb palladium, and 5 ppb platinum from the East Fork stock are reported by Foley and others (1997).
Age: Late Cretaceous/early Tertiary; mineralization is interpreted to be related to the East Fork Yentna stock, one of the composite plutons mapped by Reed and Nelson (1980).
Commodities (Major) - Au, Cu, W
Development Status: None
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | TL067 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell buried DomainDomain
- Farewell ForedeepForedeep Basin
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