|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||B-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Nugget Gulch is a small tributary of the Fortymile River located about 6 miles west of the Canadian border and about 2.5 miles east of Steele Creek. Most of the gold found in Nugget Gulch was in the portion of the creek valley that cuts the benches along the Fortymile River, in about the center of section 33, T. 7 S., R. 33 E., of the Fairbanks Meridian. The location is accurate. Nugget Gulch is locality 45 of Burleigh and Lear (1994), locality 47 of Eberlein and others (1977), and locality 63 of Cobb (1972 [MF-393]).|
The rocks in the vicinity of Nugget Gulch are Paleozoic biotite gneiss and amphibolite (Foster, 1976). In the headwaters of Nugget Gulch, Paleozoic or Mesozoic metagabbro is present. Extensive terrace gravel deposits as high as several hundred feet above the Fortymile River occur on both sides of the lower portion of the river, including near the mouth of Nugget Gulch (Foster and Keith, 1968). Most of the gold found in Nugget Gulch was in the portion that cuts the terraces and was perhaps reconcentrated from them (Prindle, 1909). Nugget Gulch was considered a rich stream for its length (Powers, 1935). There has been placer gold production on the lower Fortymile River (EA071) near the mouth of Nugget Gulch.Gold was produced from Nugget Gulch in commercial quantities in the 1890s (Brooks, 1900). Several hundred ounces of gold were produced from Nugget Gulch in the late 1800s and early 1900s (Eberlein and others, 1977).
|Geologic map unit||(-141.209580151726, 64.2626963901493)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Gold was produced from Nugget Gulch in commercial quantities in the 1890s (Brooks, 1900).|
|Indication of production||Yes; small|
|Production notes||Several hundred ounces of gold were produced from Nugget Gulch in the late 1800's and early 1900s (Eberlein and others, 1977).|
Brooks, A.H., 1900, A reconnaissance from Pyramid Harbor to Eagle City, Alaska, including a description of the copper deposits of the upper White and Tanana Rivers: U.S. Geological Survey Twenty-first Annual Report, p. 331-391, plate 2.
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.
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., 1905, The gold placers of the Fortymile, Birch Creek, and Fairbanks regions, Alaska: U.S. Geological Survey Bulletin 251, 89 p.
|Reporters||M.B. Werdon; R.L. Flynn|
|Last report date||5/1/2002|