Unnamed Occurrences (ARDF - TK081; northeast of Middle Fork Iron Creek), Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi
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Latitude & Longitude (WGS84):
62° 20' 48'' North , 149° 1' 58'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This site is a cluster of occurrences extending from an elevation of 3,400 to 4,000 feet on the northeast side of the Middle Fork, Iron Creek. The cluster is centered in the N1/2 of sec. 14, T. 26 N., R. 2 E., Seward Meridian and is accurate to within 1/4 mile.
Geology: These occurrences are near a greenstone-marble contact (Fechner, 1986). Grab samples of marble taken by the U.S. Bureau of Mines contain up to 150 parts per million silver, 0.39 part per million gold, 13,500 parts per million copper, and 12,000 parts per million lead. Grab samples of sulfide-bearing mafic volcanic rock contain up to 190 parts per million silver, 0.44 part per million gold, and 10 percent zinc. A 4-foot chip sample of sulfide-bearing mafic volcanic rock contains 9% zinc (Fechner, 1986).
Workings: Surface sampling by the U.S. Bureau of Mines (Fechner, 1986).
Commodities (Major) - Ag, Au, Cu, Pb, Zn
Development Status: None
Deposit Model: Cyprus massive sulfide? (Cox and Singer, 1986; model 24a?)
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: | TK081 |
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