Sulfur Isotopes as a Clue to the Genetic Geochemistry of a Roll-Type Uranium Deposit

Sulfur Isotopes

“…The reported values date from the pioneer period of 8 isotope work, and they contributed a great deal to the interest of ore geologists in the "sulfur isotope method". The genetical conclusions drawn from 8 isotope measurements on the so-called roll-type ores are discussed by Warren (1972).…”

Variations of Stable Isotope Ratios in Nature

“…Two types of deposits, where the internal S-isotope variations fit the expected scheme of bacterial reduction, but where the biogenic nature was already known from other geological observations, are the "sandstone-type" uranium mineralization in the Colorado Plateau (Warren 1972) and the Kupferschiefer in Central Europe (Marowsky 1969), although thermal sulfate reduction may have occurred at the base of the Kupferschiefer (Bechtel et al 2001). …”

Principal uranium deposits of the world

“…Curry (1976) Release, 1973, v. 4, no. 13, p. 2;Curry, 1976;Davis, 1969;Hagmaier, 1975, 1976;Fischer, 1974b;Granger, 1966;Warren, 1969, 1974;Keefer and Schmidt, 1973;Law and others, 1975;Mrak, 1968;Rosholt and others, 1965;Seeland, 1976;Sharp and Gibbons, 1964;Sharp and White, 1957;Sharp and others, 1954;Tatsch, 1976;Warren, C. G., 1972 (Dahl and Hagmaier, 1975). The sandstones were deposited as point bars by a meandering stream, and to a lesser extent as channel bars by sand-laden streams (Dahl and Hagmaier, 1975, p. 1).…”