Physics
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.1697l&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 50, Issue 8, pp.1697-1702
Physics
2
Scientific paper
A selective phase extraction procedure was developed for the identification of the significant phases of a typical deep soil profile sampled in the vicinity of the Ranger No. 1 uranium ore body, Alligator Rivers region, N.T., Australia. The significant phases were identified as amorphous iron oxide, crystalline iron oxide and a clay/quartz resistate. The distribution of 238 U, 234 U, 230 Th and 226 Ra between the phases was measured. The results indicated that the amorphous iron oxide phase is in adsorption/desorption equilibrium with the ground water. The crystalline iron oxide phase contains a chemical control, the kinetics of which are commensurate with or less than the half-life of 230 Th (7.52 × 10 4 y). The clay/quartz resistate is enriched in 238 U descendants in such a way that they are not readily accessible to the ground water.
Davey Brian G.
Gray David J.
Lowson Richard T.
Short Stephen A.
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