The results are presented of the determination of the U234/U238 ratio in sections of two exogeneous uranium deposits from an arid zone, for the purpose of establishing their genetic origin.
For a uranium anomaly, confined to the contact of granites with amphibolites, on the basis of the U234/U238 determination in the secondary uranium mineralization zone of oxidation and of the regenerating zone, in the waters of the region and of the granite massif, and aIso in extracts of soils, the source of the uranium (granites) is established and a mechanism is proposed for the accumulation of uranium in the surface friable formations and in the cementation zone. The time of formation of the sooty uranites is estimated (∼3 million years). For a uranium anomaly confined to the “gypsumized” section of the tertiary clays, on the basis of the U234/U238 determination in the extracts of clay the conclusion is drawn that the most probable mechanism of uranium accumulation is the mobilization of the syngenetieally-scattered uranium of the clays themselves and its concentration in the sections with the most rapid evaporation.
An isotopic-uranium criterion for the non-metalliferous origin of uranium anomalies is proposed.
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N. G. Syromyatnikov, Migration of the Isotopes of Uranium, Radium and Thorium and the Interpretation of Radioactive Anomalies [in Russian], Alma-Ata, Izd.-vo AN KazSSR (1961).
K. E. Ivanov and R. G. Kudryashova, Col.: Problems of Applied Radiogeology [in Russian], Edited by D. Ya. Surazhskii, Gosatomizdat, Moscow (1963), p. 244.
L. S. Evseeva and A. I. Perel'man, Geochemistry of Uranium in the Zone of Hypergenesis [in Russian], Atomizdat, Moscow (1962).
Translated from Atomnaya Énergiya, Vol. 19, No. 2, pp. 169–174, August, 1965
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Syromyatnikov, N.G. Concerning the problem of using the isotopic ratio U234/U238 for interpreting uranium anomalies in friable formations. At Energy 19, 1060–1065 (1965). https://doi.org/10.1007/BF01126425
- Arid Zone
- Uranium Mineralization