Abstract
The article examines the probable causes of the appearance of anomalous leads and the possibility of the use of isotopic anomalies in leads for prospecting uranium deposits. It is assumed that the apperance of leads with an unusually high content of radiogenic isotopes (Pb207, Pb206) is due to the following geological processes: 1) the rapid accumulation of young sediments as a result of the intense erosion of ancient uranium deposits; 2) the assimilation by magma and deep-seated granitization of uranium-bearing rocks which appeared long before magma-tism; 3) hydrothermal metamorphism of uranium ore bodies; 4) supergenesis in the oxidation zone of uranium deposits.
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