|Quadrangle map, 1:250,000-scale||CI|
|Quadrangle map, 1:63,360-scale||B-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Coordinates are for the junction of Greenhorn Creek and Bottom Dollar Creek. The location of individual placer operations is unknown, but the entire drainage is covered by placer claims. Bottom Dollar Creek drains into Harrison Creek, which is a tributary of Birch Creek.|
Bottom Dollar Creek is about 7 to 8 km long and flows southward into Harrison Creek. The upper 3 km of Bottom Dollar Creek is underlain by Cretaceous chloritized porphyritic biotite monzogranite. Primary trace minerals include zircon, topaz, apatite and ilmenite. In the granite, anomalous gold concentrations are spatially associated with sericite-quartz occurrences (Wiltse and others, 1995). The coarse gravel along the lower part of the creek has been thoroughly mined. A pebble count of creek gravel near the mouth of the creek shows 77 percent quartzite, 13 percent quartz, and 10 percent mica schist (Yeend, 1991). Greenhorn Creek and Nugget Gulch are tributaries of Bottom Dollar Creek.Small-scale mining on Bottom Dollar Creek was reported in 1909 to 1910, 1912, 1936, and 1938 to 1939, and sluicing occurred in 1975 (Eberlein and others, 1977, p. 18). Some small operations occurred in the 1980s and 1990. Most of the gravels have been processed for gold at least once (Menzie and others, 1983). Colledge Enterprises reported drilling on Bottom Dollar Creek in 1996 (Bundtzen and others, 1996).
|Geologic map unit||(-144.813438207399, 65.4006354788528)|
|Mineral deposit model||Placer gold deposit (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Workings or exploration||Small-scale mining on Bottom Dollar Creek was reported in 1909 to 1910, 1912, 1936, and 1938 to 1939, and sluicing occurred in 1975 (Eberlein and others, 1977, p. 18). Some small operations occurred in the 1980s and 1990. Most of the gravels have been processed for gold at least once (Menzie and others, 1983). Colledge Enterprises reported drilling on Bottom Dollar Creek in 1996 (Bundtzen and others, 1996).|
|Indication of production||Yes; small|
|Production notes||Mining has been reported (see workings/exploration); however, amount of production is unknown.|
Additional commentsGreenhorn Creek is a tributary of Bottom Dollar Creek, while Greenhorn Gulch is a tributary of Boulder Creek. Greenhorn Gulch is sometimes referred to as Greenhorn Creek in the literature and may lead to some confusion. Most information reported for Greenhorn Creek probably refers to Greenhorn Gulch, since Greenhorn Gulch was mined more extensively than Greenhorn Creek.
Bundtzen, T.K., Eakins, G.R., Green, C.B., and Lueck, L.L., 1986, Alaska's mineral industry, 1985: Alaska Division of Geological and Geophysical Surveys Special Report 39, 68 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Circle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-391, 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 Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-633, 72 p.
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.
Menzie, W.D., Foster, H.L., Tripp, R.B., and Yeend, W.E., 1983, Mineral resource assessment of the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-170-B, 61 p., 1 sheet, 1:250,000.
Mertie, J.B., Jr., 1932, Mining in the Circle district: U.S. Geological Survey Bulletin 824-D, p. 155-172.
Mertie, J.B., Jr., 1938, Gold placers of the Fortymile, Eagle, and Circle districts, Alaska: U.S. Geological Survey Bulletin 897-C, p. 133-261.
Smith, P.S., 1938, Mineral industry of Alaska in 1936: U.S. Geological Survey Bulletin 897-A, p. 1-107.
Smith, P.S., 1939, Mineral industry of Alaska in 1938: U.S. Geological Survey Bulletin 917-A, p. 1-113.
Smith, P.S., 1941, Mineral industry of Alaska in 1939: U.S. Geological Survey Bulletin 926-A, p. 1-106.
Spurr, J.E., and Goodrich, H.B., 1898, Geology of the Yukon gold district, Alaska, with an introductory chapter on the history and present condition of the district by H.B. Goodrich in Walcott, C.D., editor, Eighteenth annual report of the United States Geological Survey to the Secretary of the Interior, 1896-1897: Part III - Economic geology: U.S. Geological Survey 18th Annual Report, Part 3, p. 87-392.
Wiltse, M.A., Reger, R.D., Newberry, R.J, Pessel, G.H., Pinney, D.S., Robinson, M.S., and Solie, D.N., 1995, Bedrock geologic map of the Circle mining district, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 95-2B, 1 sheet, scale 1:63,360.
|Reporters||C.J. Freeman, J.R. Guidetti Schaefer, A.S. Clements (Avalon Development Corporation)|
|Last report date||9/8/1998|