|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 a broad vegetated ridge at an elevation of 1,850 feet (564 m) in Section 29, T. 17 S., R. 30 E., of the Kateel River Meridian. Location is to within 1,000 feet (304 m).|
Miller and others (1980) reported anomalous thorium and uranium from grab samples of porphyritic sanadine-rich rhyolite. Clautice and others (1993) report large sanadine crystals up to 2 cm in diameter, and abundant limonite staining. The occurrence is inferred to be Early Tertiary in age, based on isotopic ages of Sischu Volcanics (Moll and others, 1980).Miller and others (1980) report values of 24.1 ppm uranium and 117 ppm thorium from grab samples. Clautice and others (1993) report values of 115 ppm thorium, 29 ppm uranium, 230 ppm cerium, and elevated rare-earth-element values.
|Geologic map unit||(-153.038367000939, 63.9814376564992)|
|Mineral deposit model||Volcanogenic uranium (Cox and Singer, 1986; model 25f).|
|Mineral deposit model number||25f|
|Age of mineralization||Early Tertiary, based on isotopic ages of Sischu Volcanics (Moll and others, 1980).|
|Alteration of deposit||Limonitic.|
|Workings or exploration||Miller and others (1980) report values of 24.1 ppm uranium and 117 ppm thorium from grab samples. Clautice and others (1993) report values of 115 ppm thorium, 29 ppm uranium, 230 ppm cerium, and elevated rare-earth-element values.|
|Indication of production||None|
Additional commentsSee MD001.
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|