|Quadrangle map, 1:250,000-scale||CA|
|Quadrangle map, 1:63,360-scale||C-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Cub Creek placer mine is along lower Cub Creek, a tributary to Bear Creek. The map site is in section 6, T. 1 N., R. 11 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 31.|
Geologic descriptionBedrock in the general area of the Cub Creek mine includes syenite of the Late Cretaceous Granite Mountain pluton, and, in the lower portion of the creek, Jurassic-Cretaceous andesite and greenstone. Creek boulders are largely syenite, monzonite, or diorite. The deposit is a gold placer; gold is distributed through 2 feet of gravel overlying bedrock. The gold is fine and flaky and assays $19.20 per ounce (gold at $20.67/ounce) (Harrington, 1919). Concentrates contain a little pyrite and abundant magnetite (Moffit, 1905). Gault and others (1953) found uranothorianite in the placer concentrates on Cub Creek and its headwaters.
|Geologic map unit||(-161.032652543399, 65.5093305395806)|
|Mineral deposit model||Placer Au-PGE (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Some prospecting cuts were made in 1964, but there was no mining at that time.|
|Indication of production||Yes; small|
Additional commentsStream gradient 50 to 75 feet per mile.
Cass, J.T., 1959, Reconnaissance geologic map of the Candle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-287, 1 sheet, scale 1:250,000.
Cobb, E.H., 1972, Metallic mineral resources map of the Candle Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-389, 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 Candle, Holy Cross, Norton Bay, Nulato, and Unalakleet quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-866, 102 p.
Gault, H.R., Killeen, P.L., West, W.S., and others, 1953, Reconnaissance for radioactive deposits in the northeastern part of the Seward Peninsula, Alaska, 1945-47 and 1951: U.S. Geological Survey Circular 250, 31 p.
Harrington, G.L., 1919, The gold and platinum placers of the Kiwalik-Koyuk region: U.S. Geological Survey Bulletin 692-G, p. 369-400.
Henshaw, F.F., 1909, Mining in the Fairhaven precinct: U.S. Geological Survey Bulletin 379-F, p. 355-369.
Herreid, G.H., 1965, Geology of the Bear Creek area, Seward Peninsula, Candle quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 12, 16 p., 1 sheet, scale 1:40,000.
Moffit, F.H., 1904, The Kotzebue placer gold field of Seward Peninsula in Emmons S.F., and Hayes, C.W., Contributions to economic geology, 1903, U.S. Geological Survey Bulletin 225, p. 74-80.
Moffit, F.H., 1905, The Fairhaven gold placers, Seward Peninsula, Alaska: U.S. Geological Survey Bulletin 247, 85 p.
Smith, P.S., and Eakin, H.M., 1910, Mineral resources of the Nulato-Council region: U.S. Geological Survey Bulletin 442-H, p. 316-352.
|Reporters||Anita Williams (Anchorage, AK)|
|Last report date||1/12/2000|