|Quadrangle map, 1:250,000-scale||LG|
|Quadrangle map, 1:63,360-scale||B-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Cobb (1972, MF-413), loc. 93. Mining occurred in the lower section of Ophir Creek, a tributary of Nome Creek. Accuracy is within 1,500 feet.|
Geologic descriptionCoarse gold was discovered along Ophir Creek in 1910 (Ellsworth and Parker, 1911, p. 165). Pay gravel was discovered in shallow bench deposits in 1918 (Martin, 1920, p. 38). The largest nugget was valued at $4.30 and the gravel ran $1.25 to $1.75 per bedrock foot (Ellsworth and Parker, 1911, p. 165).
|Geologic map unit||(-147.083478532588, 65.3635898710376)|
|Mineral deposit model||Placer gold deposit (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Workings or exploration||Small scale mining and prospecting 1910 - 1918 (Cobb, 1976; OFR 76-633, p. 148).|
|Indication of production||Yes; small|
Cobb, E.H., 1972, Metallic mineral resources map of the Livengood quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-413, 2 sheets, scale 1:250,000.
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Livengood quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-819, 241 p.
Ellsworth, C.E., 1912, Placer mining in the Fairbanks and Circle Disctricts: U.S. Geological Survey Bulletin 520-H, p. 240-245.
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.
Martin, G.C., 1920, The Alaska mining industry in 1918: U.S. Geological Survey Bulletin 712-A, p. 1-52.
|Reporters||C.J. Freeman, J.R. Guidetti Schaefer (Avalon Development Corporation)|
|Last report date||5/4/1999|