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[en] The hydrogeochemistry of trace components in bed-infiltration deposits was examined by highly sensitive atomic absorption and neutron activation methods (with radiochemical preparation). As a result of a decrease in pH, aqueous solutions at the front of the zone of oxidation of pyritic, low-carbonate beds are enriched in alkaline earths, rare-earth metals, and chalcophile elements, which are then redeposited in adjacent uranium ore zones across alkaline, reducing, and hydrogen sulfide barriers
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