|Quadrangle map, 1:250,000-scale||NM|
|Quadrangle map, 1:63,360-scale||C-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This alluvial placer gold mine is on Basin Creek, an east tributary to Nome River. About 7,000 to 8,000 feet of Basin Creek, between elevations of 150 and 350 feet, have been placer mined. The map location is 0.6 mile upstream of the mouth of Basin Creek, about where it enters the Nome River floodplain, in the NW1/4 section 28, T. 9 S., R. 33 W., Kateel River Meridian. It is locality 112 of Cobb (1972 [MF 463], 1978 [OFR 78-93]). The location is accurate to within about 500 feet.|
Geologic descriptionGold was discovered on Basin Creek by 1900 (Brooks and others, 1901). At least 1 mile of the creek has been extensively placer mined, much by a small floating dredge. The partly crystalline gold was in a 150-foot-wide pay streak consisting of coarse gravels on bedrock and in crevices in bedrock. From top to bottom, the unconsolidated section included 2 feet of soil, 3 feet of rounded gravel, 12 feet of coarse, angular gravel containing more than 30 percent clasts greater than 10 inches in diameter, clay on bedrock, and 0.5 to 1.5 feet of fractured bedrock (Collier and others, 1908). Heavy mineral concentrates contained ilmenite, hematite, and scheelite. Coats (1944) later reported that the amount of placer scheelite in Basin Creek was negligible. The gold was approximately 900 fine (Purington, 1905). This mine continued to be active, at least for the purposes of tourist visits, at least until the 1970s. Bedrock is mainly marble, probably of Paleozoic protolith age (Hummel, 1962 [MF 247]; Till and Dumoulin, 1994). Bundtzen and others (1994) determined that albite-bearing mafic schist was in thrust contact with the marble about at the head of the pay streak in Basin Creek.
|Geologic map unit||(-165.286415157011, 64.6813394865414)|
|Mineral deposit model||Alluvial placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Extensive placer mine tailings are present along about 1 mile of Basin Creek upstream from the Nome River floodplain. Road construction materials have also been mined from the patented claims in Basin Creek. Mining since about 1960 has been mainly by a bucket line dredge with about 1.5-cubic-foot buckets. This dredge was constructed, and has been operated, by the Engstrom family.|
|Indication of production||Yes; small|
|Production notes||Production until about 1906 was about 1,450 ounces of gold (Moffit, 1913). Total production until 1996 is believed to be less than 20,000 ounces.|
Additional commentsBasin Creek has been one of the most productive creeks on the east side of the Nome River in the Nome district.
|MRDS Number||A012919; D002575|
Brooks, A.H., Richardson, G.B., Collier, A.J., and W.C. Mendenhall, 1901, A reconnaissance in the Cape Nome and adjacent gold fields of Seward Peninsula, Alaska, in 1900: U.S. Geological Survey Special Publication, p. 1-185, maps.
Bundtzen, T.K., Reger, R.D., Laird, G.M., Pinney, D.S., Clautice, K.H., Liss, S.A., and Cruse, G.R., 1994, Progress report on the geology and mineral resources of the Nome mining district: Alaska Division of Geological and Geophysical Surveys, Public Data-File 94-39, 21 p., 2 sheets, scale 1:63,360.
Coats, R.R., 1944, Lode scheelite occurrences of the Nome area: U.S. Geological Survey Open-File Report 17, 6 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.
Collier, A.J., Hess, F.L., Smith, P.S., and Brooks, A.H., 1908, The gold placers of parts of Seward Peninsula, Alaska, including the Nome, Council, Kougarok, Port Clarence, and Goodhope precincts: U.S. Geological Survey Bulletin 328, 343 p.
Hummel, C.L., 1962, Preliminary geologic map of the Nome C-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-247, 1 sheet, scale 1:63,360.
Moffit, F.H., 1913, Geology of the Nome and Grand Central quadrangles, Alaska: U.S. Geological Survey Bulletin 533, 140 p.
Purington, C.W., 1905, Methods and costs of gravel and placer mining in Alaska: U.S. Geological Survey Bulletin 263, 273 p.
Till, A.B., and Dumoulin, J.A, 1994, Geology of Seward Peninsula and St. Lawrence Island, in Plafker, G., and Berg, H.C., eds., The Geology of Alaska: Geological Society of America, DNAG, The Geology of North America, v. G-1, p. 141-152.
|Reporters||C.C. Hawley and Travis L. Hudson|
|Last report date||7/10/2000|