|Quadrangle map, 1:250,000-scale||SM|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Red Mountain prospect is along the southwest flank of Red Mountain, an isolated summit on the eastern edge of the Kuskokwim Mountains. The prospect is just southwest of VABM 1461 which is about 0.5 mile east of the center of section 8, T. 18 N., R. 44 W., of the Seward Meridian.|
The Red Mountain prospect consists of quartz-tourmaline veins, axinite-tourmaline breccias, and oxidized shear zones, associated with a hypabyssal, porphyritic to aphanitic pluton that intrudes shale and sandstone of the Upper Cretaceous, Kuskokwim Group (Cady and others, 1955; M.L. Miller, J.Y. Foley, and T.K. Bundtzen, unpublished field data, 1997). The mineralization covers about half of a square mile. Goethite dominates in the veins and breccias but relict arsenopyrite grains are locally preserved. Rubble-crop indicates that the veins and vein-breccias strike northeast.In 1975, Resource Associates of Alaska, Inc. collected surface samples and reported up to 3,500 parts per billion (ppb) ppb gold and 24 parts per million (ppm) silver from samples collected on Red Mountain (Jennings, 1975). Twenty seven grab and chip samples collected in 1997 by the U.S. Geological Survey and Calista Corporation contained up to 1,140 ppb gold (3 samples contained more than 1,000 ppb gold), 18.0 ppm silver, 5,330 ppm arsenic, 134 ppm antimony, 10.8 ppm mercury, 450 ppm lead, 53 ppm tungsten, 645 ppm zinc, 167.0 ppm bismuth, 14.0 ppm cadmium, 116 ppm tin, 396 ppm copper, and 8.4 ppm molybdenum (M.L. Miller, J.Y. Foley, and T.K. Bundtzen, unpublished analytical data, 1997).
|Geologic map unit||(-157.283570168285, 61.5776552177923)|
|Mineral deposit model||Silver-polymetallic veins (Cox and Singer, 1986; model 20b).|
|Mineral deposit model number||20b|
|Alteration of deposit||Axinite-tourmaline-quartz greisen.|
|Workings or exploration||In 1975, Resource Associates of Alaska, Inc. (RAA) sampled the Red Mountain prospect on behalf of Calista Corporation. The prospect was examined by the U.S. Geological Survey, the Alaska Division of Geological Survey, and Calista Corporation in 1997.|
|Indication of production||None|
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.
Jennings, D., 1975, Mineral resource evaluation for Calista Corporation-final report of exploration activities during 1975: Fairbanks, Alaska, Resource Associates of Alaska, Inc. unpublished report, 14 p.
|Reporters||T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey)|
|Last report date||5/9/2003|