Hill Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale FB
Quadrangle map, 1:63,360-scale D-1
Latitude 64.973
Longitude -147.43
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Hill Creek mine is located in sec. 30, T. 2 N., R. 2 E., Fairbanks Meridian. The location given is the approximate center of placer workings that extend from about 1,000 feet to 2,500 feet upstream from the junction of Hill Creek and Gilmore Creek. The mine is locality 56 of Cobb (1972 [MF 410]).

Geologic setting

Geologic description

This placer deposit is developed on weathered, coarse-grained, porphyritic biotite granite (Brooks, 1925, p. 19; Prindle, 1908, p. 40). Gold is derived from a mineralized zone near a contact between Cretaceous granite and schist (Brooks, 1911 [B 480, p. 69]). The pay streak was said to be narrow (Prindle, 1908, p. 40). The alluvium consists of granitic sand about 8 feet deep (Prindle, 1908, p. 40). The gold varies from from 750 to 934 fine (Glover, 1950).
Geologic map unit (-147.432437512451, 64.9725757089286)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Quaternary placer.
Alteration of deposit The bedrock of biotite granite is deeply weathered and stained with iron (Prindle, 1908, p. 40).

Production and reserves

Workings or exploration Open-cut mining took place in the valley floor sometime before 1908 (Prindle, 1908, p. 40). Evidence for more recent mining is the placer tailings and a mine marked on the Fairbanks (D-1) NW topographic map on Hill Creek ,but no other information is available.
Indication of production Yes; small
Production notes There probably was some minor production before 1908, and relatively modern tailings along the creek indicate some production in recent years.

References