A Supergene Origin for Vein-Type Uranium Ores in the Light of the Western Australian Calcrete-Carnotite Deposits

Uranium favorability of precambrian rocks in the Badger Flats - Elkhorn Thrust Area, Park and Teller Counties, Colorado

“…A supergene origin should be considered for the uranium occurrences in the project area. Moreau and others (1966) and Langford (1974) suggest that at least some uranium vein deposits are formed by the downward percolation of surface water through fracture zones.…”

“…The numerous uranium veins throughout the Front Range, which appear to pinch out at depth and show a simple vein mineralogy, could be the product of downward ground-water percolation. This process should not be considered as subeconomic because the Australian deposit (Langford, 1974) and the French deposits (Moreau and others, 1966), which have been attributed to Badger Flats airstrip.…”

National Uranium Resource Evaluation: Torrington Quadrangle, Wyoming and Nebraska

“…Uranium mineralization in both areas is related to meteoric water carrying uranium downward from Tertiary sediments into fractured Precambrian rocks where the uranium is precipitated. Langford (1974Langford ( , 1977 has argued for the supergene origin of many deposits previously thought to be of hydrothermal origin, for example, the pitchblende-vein deposits of the Canadian Shield.…”

Principal uranium deposits of the world

“…Secondary minerals and carnotite are the principal radioactive minerals. The carnotite occurs as thin films in horizontal layers lining the voids and cavities along 45 km of the channel, a filled ancient river bed, at a depth rarely more than 8 m below the surface (Langford, 1974).…”

“…References: Brooks, 1971;Dall'Aglio and others, 1974;C. S. Ferris, written commun., 1973;Gordon, 1976;King, 1976;Langford, 1974;Lloyd, 1973;Mineral Trade Notes, 1973, v. 70, no. 2, p. 10, and1972, v. 69, no.…”