A Method for the Determination of Some Rare Earth Elements and Their Correlation with Thorium using X-Ray Fluorescence

This paper presents the results of a simultaneous determination of some rare earth elements and some accompanying elements of the rare-earth fields of Mongolia. Correlation connections of rare earth elements with thorium are established. Data from X-ray fluorescence, gamma activation, and classical chemical methods for analyzing mineral resources were used to find the correlation dependence between rare earth elements and thorium.