Determination of recent 238U, 234U and 230Th mobility in granitic rocks: application of a natural analogue to the high-level waste repository environment
作者： Vanessa Guthrie
DOI: 10.1016/0883-2927(91)90063-U
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摘要: Abstract The isotope activity ratios 234U/238U and 230Th/234U have been investigated in drill core samples up to 1300 m depth three granitoids from Australia identify the nature of possible recent ( 1.0) which has generated excess 230Th. These enriched ground waters do not appear penetrated below 530 depth, 230Th indicates bulk loss U. observed disequilibria indicate that significant radionuclide mobilisation occurred these rocks during past
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