Uhler Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale EA
Quadrangle map, 1:63,360-scale A-2
Latitude 64.2011
Longitude -141.6313
Nearby scientific data Find additional scientific data near this location
Location and accuracy Uhler Creek drains west into the South Fork of the Fortymile River. Placer tailings are shown on the U.S. Geological Survey 1:63,360-scale topographic map of the Eagle A-2 quadrangle (1956; revised in 1971); the tailings start about 3.7 miles east of the mouth and extend for approximately 1 mile. The coordinates correspond to the midpoint of the tailings, in section 20, T. 8 S., R. 31 E., of the Fairbanks Meridian; the location is accurate. This site is locality 66 of Burleigh and Lear (1994), locality 61 of Eberlein and others (1977), and locality 57 of Cobb (1972 [MF-393]).

Geologic setting

Geologic description

The rocks in Uhler Creek are Paleozoic amphibolite-facies gneiss, amphibolite, amphibolite-feldspar gneiss, and marble (Werdon and others, 2001). The metamorphic rocks have been intruded by several plutonic bodies, including the Uhler pluton, which has a hornblende 40Ar/39Ar plateau age of 188.0 +/- 1.0 Ma, and the Napoleon pluton (see EA115), which has a hornblende 40Ar/39Ar plateau age of 186.5 +/- 1.3 Ma (Layer and others, 2002). These units have been offset by several north-south-trending high-angle faults. Small-scale placer mining occurred on Uhler Creek in the early 1900s and the 1960s, 1970s, and early 1990s (Eberlein and others, 1977; Swainbank and others, 1993).
Geologic map unit (-141.633591794121, 64.2007750411486)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Small-scale placer mining occurred on Uhler Creek in the early 1900s and in the 1960s, 1970s, and early 1990s (Eberlein and others, 1977; Swainbank and others, 1993).
Indication of production Yes; small

References

References

Layer, P.W., Drake, J., and Szumigala, D.J., 2002, 40Ar/39Ar dates for mineralization and igneous and metamorphic rocks in a portion of the Fortymile mining district, Eagle quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Preliminary Interpretive Report. [In preparation in 2002]
Reporters M.B. Werdon
Last report date 5/1/2002