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Uranium migration and geochemistry of uranium deposits in sandstone above, at, and below the water table; Part 1, Calculation of apparent dates of uranium migration in deposits above and at the water table

Rosholt, Jr

Economic geology and the bulletin of the Society of Economic Geologists, 1961-12, Vol.56 (8), p.1392-1403 [Periódico revisado por pares]

Economic Geology Publishing Company

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Título:
Uranium migration and geochemistry of uranium deposits in sandstone above, at, and below the water table; Part 1, Calculation of apparent dates of uranium migration in deposits above and at the water table
Autor: Rosholt, Jr
Assuntos: absolute age ; actinides ; AGE ESTIMATION ; calculation ; Dating ; DECAY ; DEPOSITS ; DIFFUSION ; DISTRIBUTION ; GEOCHEMISTRY ; GEOSCIENCES ; GROUND WATER ; isotopes ; LEVELS ; metals ; methods ; migration ; Migration dates ; mineral deposits, genesis ; PROTACTINIUM 231 ; QUALITATIVE ANALYSIS ; QUANTITATIVE ANALYSIS ; RADIOCHEMISTRY ; Radioisotopes ; ROCKS ; SAMPLING ; SAND ; THORIUM 230 ; URANIUM ; URANIUM ISOTOPES ; Uranium migration ; URANIUM MINERALS ; URANIUM ORES
É parte de: Economic geology and the bulletin of the Society of Economic Geologists, 1961-12, Vol.56 (8), p.1392-1403
Notas: USDOE
Descrição: The migration of U may be studied by the distribution of the radioactive daughter products, which serve as natural tracers in the migration of U. The distribution of the daughter products is determined by radiochemical analyses of samples from ore deposits in sandstone, and the apparent minimum and maximum dates of U introduction or redistribution may be calculated from the Pa231/Th230 ratio. The primary assumption required is that the Pa and Th do not migrate in measurable quantities from the place where they were produced by the decay of the parent U isotopes. The upper limit of age determination is about 250,000 years, based on the half-lives of Pa231 and Th230. The difference in the half-lives of these isotopes is reflected in their differential rates of growth and decay corresponding to migrations of the parent U during the time range considered. The growth and decay patterns, analyzed mathematically, are used to determine the apparent date of U migration. Calculations based on analyses of samples from the Hulett Creek area, Wyoming, illustrate the results for typical sandstone ore deposits that are above and at the water table.
Editor: Economic Geology Publishing Company
Idioma: Inglês

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Uranium migration and geochemistry of uranium deposits in sandstone above, at, and below the water table; Part 1, Calculation of apparent dates of uranium migration in deposits above and at the water table

Rosholt, Jr

Economic Geology Publishing Company

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