|Quadrangle map, 1:250,000-scale||FB|
|Quadrangle map, 1:63,360-scale||A-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Roosevelt mine is located somewhere in the center of T. 10 S., R. 3 W., Fairbanks Meridian. The exact location of the site that was mined is uncertain, and the coordinates are at about the mid-point of the creek. The actual location of mining may vary by a mile or more from the coordinates. This mine is locality 76 of Cobb (1972 [MF 410]).|
Geologic descriptionThe upper part of the valley of Roosevelt Creek is eroded in thick Nenana Gravel, but the lower part of the valley is eroded to a depth of 100 feet or more into interbedded clay, sand, gravel, and coal of the Tertiary Grubstake Formation (Wahrhaftig, 1970 [GQ-809]). Gold is found in the basal 2 feet of stream gravel (Maddren, 1918, p. 400). Placer gold in the creek is fine, flat, and well-worn (Prindle, 1907, p. 210-211). Mining was reported in 1910 and 1916 (Capps, 1912, p. 44; Maddren, 1918, p. 399).
|Geologic map unit||(-148.165341471242, 64.0595572530013)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary placer.|
|Workings or exploration||Small-scale placer mining was reported in 1910 and 1916 (Capps, 1912, p. 44; Maddren, 1918, p. 399-400).|
|Indication of production||Yes; small|
|Production notes||Small scale placer mining was reported in 1910 and 1916, but there is no information available of the amount of production (Capps, 1912, p. 44; Maddren, 1918, p. 399-400).|
Brooks, A.H., 1911, The Mount McKinley region, Alaska, with descriptions of the igneous rocks and of the Bonnifield and Kantishna districts by L.M. Prindle: U.S. Geological Survey Professional Paper 70, 234 p.
Capps, S.R., 1911, Mineral resources of the Bonnifield region: U.S. Geological Survey Bulletin 480-H, p. 218-235.
Capps, S.R., 1912, The Bonnifield region, Alaska: U.S. Geological Survey Bulletin 501, 64 p., 1 sheet, scale 1:250,000.
Cobb, E.H., 1972, Metallic mineral resources map of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-410, 1 sheet, scale 1:250,000.
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Fairbanks quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-662, 174 p.
Maddren, A.G., 1918, Gold placers near the Nenana coal field: U.S. Geological Survey Bulletin 662-G, p. 363-402.
Prindle, L.M., 1907, The Bonnifield and Kantishna regions, Alaska: U.S. Geological Survey Bulletin 314-L, p. 205-226.
|Reporters||J.R. Guidetti Schaefer and C.J. Freeman (Avalon Development Corporation)|
|Last report date||7/31/2001|