Unnamed Occurrence (ARDF - TK022; near Fog Creek), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TK022; near Fog Creek) | - not defined - |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 45' 34'' North , 148° 34' 55'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of about 1,500 feet on the north bank of Fog Creek, 1.4 miles south-southeast of hill 2630. The location is accurate to within 1/4 mile.
Geology: The rocks in the area of this occurrence are Triassic(?) limestone, siltstone and chert, with very fine grained, crossbedded, dark gray limestone and gray argillite interlayered with dark red weathering, gray-green chert (J. Schmidt, written commun., 2001). Locally, yellow-green-weathered material occurs below limestone horizons and red-weathering, altered material occurs in limestone- siltstone outcrops. Chert and shale are marked by yellow efflorescence, and interlayered gray argillite and chert are marked by white efflorescence. Iron-stained, silicified argillite contains 2-3 percent fine-grained pyrite. Samples of altered sedimentary rocks contain up to 1,110 parts per million zinc, 0.4 part per million gold, 1.1 parts per million silver, and 205 parts per million nickel (J. Schmidt, written commun., 2001).
Workings: Only surface sampling by U.S. Geological Survey (J. Schmidt, written commun., 2001).
Alteration: Zones of red or yellow-green weathering or alteration; yellow and white efflorescence; and iron staining (J. Schmidt, written commun., 2001).
Commodities (Major) - Au, Zn; (Minor) - Ag, Ni
Development Status: None
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
Other Databases
| Link to USGS - Alaska: | TK022 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Wrangellia DomainVolcanic Arc
- Yukon-TananaVolcanic Arc
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