Most mineralization is in trends where Top Rim sandstones are thick, usually 40 feet or greater. The location and shape of mineralized deposits are largely controlled by the permeability of the host sandstone. ![]() The Uravan Mineral Belt was defined by Fisher and Hilpert (1952) as a curved, elongated area in southwestern Colorado where the uraniumvanadium deposits in the Salt Wash Member of the Morrison Formation generally have closer spacing, larger size, and higher grade than those in adjacent areas and the region as a whole. The La Sal district uranium-vanadium deposits are a similar type to those elsewhere in the Uravan Mineral Belt. These classes are very similar to those of Dahlkamp (1993) Type 4-sandstone Subtype 4.1- tabular/peneconcordant Class 4.1.2 (a) Vanadium-Uranium (Salt Wash type) and Class 4.1.3-basal-channel (Chinle type). Any future deep drilling to explore for deposits in the Triassic basal Chinle Formation (Moss Back Member) would fit the DOE classification as Class 240- sandstone Subclass 243- channel controlled peneconcordant. Department of Energy’s (“DOE”) classification as defined by Austin and D’Andrea (Mickle and Mathews, 1978) Class 240 sandstone Subclass 244-nonchannel-controlled peneconcordant. The La Sal Project uranium-vanadium deposits in the Jurassic Salt Wash Member of the Morrison Formation are sandstone-type deposits that fit into the U.S.
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