|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Gold Run is a small west tributary of Slate Creek. The location of placer gold mining is not reported; the coordinates are near an old cabin about 2.5 miles upstream of the mouth of the creek, in section 6, T. 4 S., R. 25 E., of the Fairbanks Meridian. Gold Run is locality 25 of Burleigh and Lear (1994), locality 32 of Eberlein and others (1977), and locality 42 of Cobb (1972 [MF-393]).|
Geologic descriptionThe rocks along Gold Run are Paleozoic quartzite and micaceous, schistose quartzite (Prindle, 1913). At the head of Gold Run, there is a northeast-trending fault that separates metamorphic rocks to the southeast from Tertiary to Cretaceous conglomerate to the northwest (Foster, 1976). Just southeast of the fault, there is a small area of Tertiary to Mesozoic basalt or gabbro; northwest of the fault the sedimentary rocks have been intruded by Tertiary felsic volcanic rocks (Foster, 1976). Foster and Clark (1970) suggested the Tertiary(?) bedrock is the source for placer gold in Gold Run. The depth of the gravels is about 12 feet, and quartz is abundant (Brooks, 1905). Mining occurred on Gold Run in 1904 (Brooks, 1905). Foster and Clark (1970) reported Gold Run produced a considerable amount of placer gold.
|Geologic map unit||(-142.791811586862, 64.5923558797264)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Brooks (1905) reported mining on Gold Run in 1904.|
|Indication of production||Yes; small|
|Production notes||Foster and Clark (1970) reported Gold Run produced a considerable amount of placer gold.|
Burleigh, R.E., and Lear, K.G., 1994, Compilation of data for Phase I of the mineral resource evaluation of the Bureau of Land Management Black River and Fortymile subunits: U.S. Bureau of Mines Open-File Report 48-94, 116 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Eagle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-393, 1:250,000 scale, 1 sheet.
Cobb, E.H., 1977, Summary of references to mineral occurrences in the Eagle quadrangle, Alaska: U.S. Geological Survey Open-File Report 77-845, 122 p.
Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000.
Foster, H.L., 1976, Geologic map of the Eagle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series, Map 922, 1 sheet, scale 1:250,000.
Foster, H.L., and Clark, S.H.B., 1970, Geochemical and geologic reconnaissance of a part of the Fortymile area, Alaska: U.S. Geological Survey Bulletin 1312-M, p. M1-M29.
Powers, J.B., 1935, Synopsis and history of early day mining and prospecting on the Fortymile River and its bars and low benches: Alaska Territorial Department of Mines Miscellaneous Report 60-2, 19 p.
Prindle, L.M., 1906, The Yukon-Tanana region, Alaska; Description of Circle quadrangle: U.S. Geological Survey Bulletin 295, 27 p.
Prindle, L.M., 1913, A geologic reconnaissance of the Circle quadrangle, Alaska: U.S. Geological Survey Bulletin 538, 82 p.
|Reporters||M.B. Werdon; R.L. Flynn|
|Last report date||5/1/2002|