|Quadrangle map, 1:250,000-scale||SM|
|Quadrangle map, 1:63,360-scale||B-7|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||About 1 mile of Gold Run, a tributary of the Holokuk River, has been prospected for gold. The coordinates are at about the midpoint of this work. The prospect is at an elevation of about 450 feet in the SW1/4, sec. 8, T. 15 N., R. 51 W., of the Seward Meridian. The occurrence is locality 33 of Miller and others (1989).|
Geologic descriptionCady and others (1955) cite reports of placer gold prospects on Gold Run Creek. Morris Hofseth (oral communication, 1991) found a 5 ounce gold-quartz nugget while prospecting Gold Run in 1954. T.K. Bundtzen and M.L. Miller (unpublished data, 1999) have mapped an extensive felsic dike and sill swarm that cuts the Upper Cretaceous, Kuskokwim Group in the basin of Gold Run. Miller and others (2002) report that the nearby Buckstock pluton has a U-Pb age of 59.5 Ma. Similar igneous rocks are the sources of placer gold elsewhere in the Kuskokwim mineral belt (Bundtzen and Miller, 1997). Gray, Motooka, and Theodorakos (1997) reported that panned concentrate samples from Gold Run contained visible grains of gold and stibnite, and up to 20 percent scheelite.
|Geologic map unit||(-158.482637199182, 61.4059886027302)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Unknown, but probably Quaternary.|
|Workings or exploration||There was surface sampling and prospecting here before 1951, during 1954, and from 1992 to 1994 (Miller and others, 2002). Gray, Motooka, and Theodorakos (1997) reported that panned-concentrate samples from Gold Run contained visible grains of gold and stibnite and up to 20 percent scheelite.|
|Indication of production||None|
|Production notes||Morris Hofseth (oral communication, 1991) found a 5 ounce gold-quartz nugget on Gold Run in 1954.|
Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 242-286.
Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Sleetmute quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-368, 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 Dillingham, Sleetmute, and Taylor Mountains quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p.
Gray, J.E., Motooka, Jerry, and Theodorakos, P.M., 1997, Areas favorable for metallic resources and newly discovered mineral occurrences in the Buckstock Mountains area, southwestern Alaska, in Dumoulin, J.A., and Gray, J.E., eds, Geologic Studies in Alaska by the U.S. Geological Survey in 1995: U.S. Geological Survey Professional Paper 1574, p. 111- 124.
Miller, M.L., Belkin, H.E., Blodgett, R.B., Bundtzen, T.K., Cady, J.W., Goldfarb, R.J., Gray, J.E., McGimsey, R.G., and Simpson, S.L., 1989, Pre-field study and mineral resource assessment of the Sleetmute quadrangle, southwestern Alaska: U.S. Geological Survey Open-File Report 89-363, 115 p., 3 plates, scale 1:250,000.
Miller, M.L., Bradley, D.C., Bundtzen, T.K., and McClelland, William, 2002, Late Cretaceous through Cenozoic strike-slip tectonics of southwestern Alaska: Journal of Geology, vol.110, p. 247-270.
|Reporters||T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey)|
|Last report date||5/6/2003|