|Quadrangle map, 1:250,000-scale||MD|
|Quadrangle map, 1:63,360-scale||D-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Occurrence is situated on an isolated knob one mile (1.6 km) south of Sischu Creek at an elevation of 2,000 feet (609 m) in Section 3, T. 18 S., R. 29 E., of the Kateel River Meridian. Location is accurate to within 100 feet (30 meters).|
Miller and others (1980) reported anomalous thorium and uranium from the Sischu Volcanics. Clautice and others (1993) noted extensive development of smoky quartz and large limonitically stained zones in outcrop. Inferred to be early Tertiary, based on isotopic ages from Sischu Volcanics (Moll and others, 1981).Miller and others (1980) report values of 25.4 ppm uranium and 68.9 ppm thorium. Clautice and others (1993) reports values from six grab samples ranging from 27.0 to 73.2 ppm thorium 7.3 to 51.5 ppm uranium, 39 to 55 ppm niobium, up to 240 ppm cerium, and elevated tungsten and REE values.
|Geologic map unit||(-153.178367692348, 63.9604347828083)|
|Mineral deposit model||Volcanogenic uranium (Cox and Singer, 1986; model 25f).|
|Mineral deposit model number||25f|
|Age of mineralization||Inferred to be early Tertiary, based on isotopic ages from Sischu Volcanics (Moll and others, 1981).|
|Alteration of deposit||Smoky quartz.|
|Workings or exploration||Miller and others (1980) report values of 25.4 ppm uranium and 68.9 ppm thorium. Clautice reports values from six grab samples ranging from 27.0 to 73.2 ppm thorium, 7.3 to 51.5 ppm uranium, 39 to 55 ppm niobium, up to 240 ppm cerium, and elevated tungsten and REE values.|
|Indication of production||None|
Additional commentsSee MD001, MD002, and MD003.
Clautice, K.H., Bowman, N.D., Clough, J.G., Gilbert, W.G., Kline, J.T., Smith, T.E., and Blodgett, R.B., 1993, Land selection unit 8 (Kantishna River, Ruby, and Medfra quadrangles): References, lead isotope, geochemical and major oxide data: Alaska Division of Geological & Geophysical Surveys Public Data File 93-8, 46 p., 1 sheet, scale 1:250,000.
|Reporters||Bundtzen, T.K. (Pacific Rim Geological Consulting)|
|Last report date||6/7/1998|