|Quadrangle map, 1:250,000-scale||SM|
|Quadrangle map, 1:63,360-scale||D-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Harvison prospect is on a north-trending ridge near hill 1,050, about 2.2 miles south of the mouth of the East Fork of the George River. The prospect is in the SE1/4 sec. 25, T. 22N., R. 46 W., of the Seward Meridian. The prospect is locality 3 of Miller and others (1989). The location is accurate.|
Geologic descriptionThe Harvison prospect consists of lenses and pods of quartz and cinnabar in silicified, argillaceous sandstone of the Upper Cretaceous, Kuskokwim Group (Cady and others, 1955; Jasper, 1963). The sandstone layers near the prospect are cut by a weathered dike or sill of unknown composition. The mineralized zones are 2 to 4 inches thick and are commonly associated with silicified fault breccia. No other information is available.
|Geologic map unit||(-157.618308047201, 61.9637087521415)|
|Mineral deposit model||Silica-carbonate mercury? (Cox and Singer, 1986; model 27c).|
|Mineral deposit model number||27c?|
|Alteration of deposit||Silicification of sandstone in the area.|
|Workings or exploration||John Harvison discovered the prospect prior to 1963 by panning soils on the hill slopes nearby as well as stream gravels of nearby tributaries to the George River. By 1963, his development work consisted of a trench about 30 feet long and a 3-foot pit (Jasper, 1963).|
|Indication of production||None|
Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.
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., Gent, C.A., Snee, L.W., and Wilson, F.H., 1997, Epithermal mercury-antimony and gold-bearing vein lodes of southwest Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 287-305.
Jasper, Martin, 1961, Cinnabar province, Kuskokwim region, in Williams, J.A., Report of the Alaska Division of Mines and Minerals Report for the Year 1961: Alaska Division of Mines and Minerals Annual Report, p. 65-79.
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.
Wells, J.T., and Ghiorso, M.S., 1988, Rock alteration, mercury transport, and metal deposition at Sulphur Bank, California: Economic Geology, vol. 83, p. 606-618.
White, D. E., and Robinson, C. E., 1962, Sulphur Bank, California, a major hot spring quicksilver deposit, in Engel, A.E.J., James, H.L., and Leonard, B.F., eds., Petrologic studies: A volume in honor of A.F. Buddington: Boulder, Colorado, Geological Society of America p. 397-428.
|Reporters||T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey)|
|Last report date||5/3/2003|