title: Carbon-13/carbon-12 isotope fractionation of organic matter associated with uranium ores induced by alpha irradiation.
abstract: Analyses of stable carbon isotopes from two sample suites from sandstone uranium (tabular) ores show interesting variations. Organic carbon associated with high-grade uranium ore is heavy (delta(13)C = -16.9 to -19.6 per mil, where delta(13)C = (13)C/(12)C relative to the Pee Dee belemnite standard) relative to the adjacent lower-grade samples (-22.7 to -26.4 per mil). It is suggested that the heavy isotopic values for the are samples are related to a radiation and chemical isotope effect that has occurred mainly because of an alpha-radiation dose of 10(11) rads.
authors.forename: J S
authors.initials: JS
authors.lastname: Leventhal
authors.forename: C N
authors.initials: CN
authors.lastname: Threlkeld