Unnamed Occurrence (ARDF - MD022), McGrath District, Yukon-Koyukuk Borough, Alaska, USA
See Won - North (MD021), Win (MD060), Gemini (MD023) and Won - South (MD024) prospects.
Location: Occurrence is situated on a northeast-facing spur of an isolated range of hills at an elevation of 2,000 feet (609 m) in Section 8, T. 23 S., R. 17 E., of the Kateel River Meridian. Location is estimated to be within about 500 feet (152 m).
Geology: Quartz -galena vein cuts sheared argillite and hornfels (Patton and Moll, 1983). Surface samples contain values of 100 ppm Ag, more than 2 percent Pb, 700 ppm Sb, and 300 ppm Zn (Patton and Moll, 1983).
Workings: The occurrence was first reported by U.S. Geological Survey personnel during an AMRAP investigation of the Medfra quadrangle (Patton and others, 1980). Surface samples contain 100 ppm Ag, more than 2 percent Pb, 700 ppm Sb, and 300 ppm Zn (Patton and Moll, 1983).
Commodities (Major) - Ag, Pb; (Minor) - Sb, Zn
Development Status: No
Deposit Model: Polymetallic Vein (Cox and Singer, 1986; model no. 22c)
ReferencesKing, H.D., Risoli, D.A., Cooley, E.F., O'Leary, R.M., Speckman, W.A., Speisman, D.L., and Galland, D.W., 1980, Final results and statistical summary of analyses of geochemical samples from the Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811F, 134 pages. Patton, W.W. Jr., and Moll, E.J., 1983, Mineral resources assessment map of the Medfra quadrangle: U.S. Geological Survey Open-File Report 80-811G, one sheet at 1:250,000. Patton, W.W. Jr., Moll, E.J., Dutro, J.T., Jr., Silberman, M.L., and Chapman, R.M., 1980, Preliminary geologic map of the Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811, one sheet at 1:250,000 scale.
| Galena|| Quartz|
2 entries listed. 2 valid minerals.
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