|Quadrangle map, 1:250,000-scale||TN|
|Quadrangle map, 1:63,360-scale||B-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Chapman Creek placer mine is at the west edge of section 30, T. 6 N., R. 12 W., of the Fairbanks Meridian. The site corresponds to location 43 of Cobb (1972), and is approximately 1 mile downstream from the U.S. Bureau of Land Management location of Chapman Creek (MAS number 0020480081).|
Chapman Creek drains an area underlain by Triassic to Cretaceous sandstone, shale, and argillite (Chapman and others, 1982; Reifenstuhl and others, 1997 [RI 97-15a]). Granite of unknown age crops out in the headwaters of Chapman Creek (Burand and Saunders, 1966). The main channel follows a high-angle fault.
Very little has been published about placer mining on Chapman Creek. Ellsworth (1910) reported prospecting on the creek in 1909. In 1912, four men mined on Chapman Creek (Ellsworth and Davenport, 1913). No other information about mining or production has been made public.Burand and Saunders (1966) reported a stibnite occurrence (TN070) in the headwaters of Chapman Creek near the granite, and confirmed that placer mining had taken place on the creek.
|Geologic map unit||(-150.116970717937, 65.3174268986807)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Very little work has been reported on Chapman Creek. According to Ellsworth (1910), values from earlier placer prospecting were sufficient to attract other prospectors, and he reported some development work. In 1912, Ellsworth and Davenport (1913) reported that 4 men mined there.|
|Indication of production||Yes; small|
Burand, W.M., and Saunders, R.H., 1966, A geochemical investigation of Minook Creek, Rampart district, Alaska: Alaska Division of Mines and Minerals Geochemical Report 12, 15 p.
Chapman, R.M., Yeend, W.E., Brosge, W.P., and Reiser, H.N., 1982, Reconnaissance geologic map of the Tanana quadrangle: U.S. Geological Survey Open-File Report 82-734, 20 p., scale 1:250,000.
Cobb, E.H., 1972, Metallic mineral resources map of the Tanana quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-371, 1 sheet, scale 1:250,000.
Cobb, E.H., 1977, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Tanana quadrangle, Alaska: U.S. Geological Survey Open-File Report 77-432, 98 p.
Ellsworth, C.E., 1910, Placer mining in the Yukon-Tanana region: U.S. Geological Survey Bulletin 442-F, p. 230-245.
Ellsworth, C.E., and Davenport, R.W., 1913, Placer mining in the Yukon-Tanana region: U.S. Geological Survey Bulletin 542-F, p. 203-222.
Reifenstuhl, R.R., Dover, J.H., Pinney, D.S., Newberry, R.J., Clautice, K.H., Liss, S.A., Blodgett, R.B., Bundtzen, T.K., and Weber, F.R., 1997, Geologic map of the Tanana B-1 Quadrangle, central Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 97-15A, 17 p., 1 sheet, scale 1:63,360.
|Reporters||G.E. Graham (ADGGS)|
|Last report date||12/10/2000|