Measurements of238U,234U and230Th in impure carbonates for age determination |
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| Authors: | T. L. Ku L. U. Joshi |
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| Affiliation: | (1) Department of Geological Sciences, University of Southern California, 90007 Los Angeles, California, (USA);(2) Present address: Air Monitoring Section, Bhabha Atomic Research Centre, 400 085 Bombay, India |
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| Abstract: | The carbonate cements of conglomeritic deposits of late Pleistocene age have been leached with 0.2N hydrochloric acid and analyzed radiochemically. The leachate and the residue fractions were separately measured for238U,234U and230Th, using isotope-dilution and alpha-spectrometric techniques. The data are used to estimate the isotopic activities of uranium and thorium in the carbonate phase. These activities give age information for the carbonate cementation. Ages in the range of 185–320·103 years were obtained for the samples studied. |
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