Harvison

Prospect, Inactive

Commodities and mineralogy

Main commodities Hg
Ore minerals cinnabar
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SM
Quadrangle map, 1:63,360-scale D-5
Latitude 61.9644
Longitude -157.61591
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 setting

Geologic description

The 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.

Production and reserves

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

References

MRDS Number A013428

References

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.
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