Unnamed (northern Clearwater Mountains west of peak 5315)

Occurrences, Inactive

Commodities and mineralogy

Main commodities W
Ore minerals scheelite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-6
Latitude 63.2472
Longitude -146.8284
Nearby scientific data Find additional scientific data near this location
Location and accuracy This record describes a mineralized area that includes several related deposits that occur from about 4,650 to 4,800 feet in elevation in a west-trending gully about a half-mile west of peak 5315. Another deposit is about 1,000 feet to the south at an elevation of about 4,600 feet. The location, which is near the middle of the south boundary of section 20, T. 19 S., R. 5 E., Fairbanks Meridian, is a general one for the group of occurrences.

Geologic setting

Geologic description

Mineral deposits of this record probably occur in the same low-angle thrust fault zone as those at MH052 and MH054. Rocks at this site include metabasalt of Late Triassic age and limestone, probably of the same age, the inferred host of skarny scheelite deposits.
The location of the deposits was shown on a map prepared by G.A. Moerlein (written communication, 1980). The deposits themselves are not described, but by inference from records MH052 and MH054, they are crudely stratabound skarny bodies in the footwall of a major low-angle thrust fault zone.
Geologic map unit (-146.830669053734, 63.2467607401167)
Mineral deposit model W skarn? (Cox and Singer, 1986; model 14a?).
Mineral deposit model number 14a?
Age of mineralization Probably mid- to Late Cretaceous, formed during a period of regional deformation and metamorphism.

Production and reserves

Workings or exploration Deposits were discovered in about 1980 by either George A. Moerlein or Rodney A. Blakestad during detailed evaluation of a large mineralized area including MH052, MH054, and MH055.
Indication of production None

References

Reporters W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)
Last report date 8/3/2001