|Quadrangle map, 1:250,000-scale||SK|
|Quadrangle map, 1:63,360-scale||B-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is north of the Little Salmon River at an elevation of approximately 700 feet; it is approximately 1.1 miles, S32W from VABM 1720 ('Knob'). It is approximately 6 miles west of the village of Klukwan in the NE1/4, section 1, T. 29 S., R. 55 E. of the Copper River Meridian. It is shown as locations 214 to 218 by Still and others (1984); site M by Still and others (1987); site K by Gilbert and Redman (1989); and number S016 by Wells and others (1986).|
Geologic descriptionStill and others (1991) describe this as a silver prospect that consists of silver-bearing, galena-sphalerite-quartz veins in dolomite and argillite. They collected rock samples that contained up to 610.3 ppm silver, 15.7% lead, 5.8% zinc, 0.471 ppm gold, and 1,640 ppm copper. Sample descriptions include: 'quartz vein with sphalerite, galena pyrite, and malachite(?)', 'quartz-gossan breccia with galena' and 'quartz-calcite breccia with galena and sphalerite'. The Devonian to Mississippian age of the carbonate host rocks (Gilbert and others, 1987) establishes a maximum age for the mineralization. However, the quartz-sulfide veins are probably of Tertiary age based on the 29.3 + 1 to 33.0 + 1 m.y. age of nearby intrusive bodies (Gilbert and others, 1987).
|Geologic map unit||(-136.07185475898, 59.3896690283235)|
|Mineral deposit model||Silver-bearing quartz-sulfide veins in dolomite and argillite (Cox and Singer, 1986; 22c).|
|Mineral deposit model number||22c|
|Age of mineralization||The Devonian to Mississippian age of the carbonate rocks that host the deposit (Gilbert and others, 1987) establishes a maximum age for the mineralization. However, the quartz-sulfide veins are probably of Tertiary age, based on the 29.3 + 1 to 33.0 + 1 m.y. age of nearby intrusive bodies (Gilbert and others, 1987).|
|Workings or exploration||According to Still and others (1991), this prospect is in an area penetrated by overgrown logging roads, with few outcrops. It was discovered by Merrill Palmer in 1980.|
|Indication of production||None|
Gilbert, W.G., and Redman, E.C., 1989, Lode deposits, prospects, and occurrences of the Porcupine mining area, southeast Alaska: U.S. Bureau of Mines Open-File Report 17-89, 1 sheet, scale 1:39,600.
Gilbert, W.G., Burns, L.E., Redman, E.C., and Forbes, R.B., 1987, Preliminary bedrock geology and geochemistry of the Skagway B-3 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 87-2, 2 sheets, scale 1:36,200.
MacKevett, E.M., Jr., Robertson, E.C., and Winkler, G.R., 1974, Geology of the Skagway B-3 and B-4 quadrangles, southern Alaska: U.S. Geological Survey Professional Paper 832, 33 p., 1 plate.
Still, J.C., 1991, Section A: Haines - Klukwan - Porcupine subarea, in U.S. Bureau of Mines, Mineral investigations in the Juneau Mining District, Alaska, 1984-1988: Volume 2 - Detailed mine, prospect, and mineral occurrence descriptions: U.S. Bureau of Mines Special Publication VOL. 2A, 214 p., 9 sheets.
Still, J.C., Gilbert, W.G., and Forbes, R.B., 1987, Final report of stream sediment, float, and bedrock sampling in the Porcupine mining area, southeast Alaska, 1983-1985: U.S. Bureau of Mines Open-File Report 36-87, 35 p., 8 sheets.
Still, J.C., Hoekzema, R.B., Bundtzen, T.K., Gilbert, W.G., Wier, K.R., Burns, L.E., and Fechner, S.A., 1991, Economic geology of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-4, 156 p., 5 sheets, scale 1:63,360.
Still, J.C., Weir, K.R., Gilbert, W.G., and Redman, Earl, 1984, Stream sediment, float, and bedrock sampling in the Porcupine mining area, southeast Alaska: U.S. Bureau of Mines Open-File Report 173-84, 6 p., 1 sheet, scale 1:250,000.
|Reporters||T.C. Crafford (T. Crafford & Associates, Anchorage)|
|Last report date||2/4/2001|