RARE-EARTH ELEMENTS DISTRIBUTION IN ACETIC ACID LEACHATES FROM CARBONATE ROCKS OF THE UPPER RIPHEAN UK FORMATION IN THE SOUTHERN URALS
The rare-earth elements (REE) behavior in acetic acid leachates of various concentrations from dolomitized limestones of the Bashkir meganticlinorium Uk Formation is considered. The REE patterns in leachates are characterized by the heavy REEs depletion, which, in combination with lack or weak positive cerium anomalies, may indicate moderately anoxic conditions of sedimentary environment.