Unnamed (northeast of Middle Fork Iron Creek)

Occurrences, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu; Pb; Zn

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale B-5
Latitude 62.3469
Longitude -149.0332
Nearby scientific data Find additional scientific data near this location
Location and accuracy 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.

Geologic setting

Geologic description

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).
Geologic map unit (-149.035421132431, 62.3464056441174)
Mineral deposit model Cyprus massive sulfide? (Cox and Singer, 1986; model 24a?)
Mineral deposit model number 24a?

Production and reserves

Workings or exploration Surface sampling by the U.S. Bureau of Mines (Fechner, 1986).
Indication of production None

References