Rare earth minerals of the Antonova Gora deposit (Eastern Transbaikalia)

For the time, the contents of rare- 13.27 ppm for poor associations. The rare-earth elements in the tungsten deposits of Antonova Gora in Transbaikalia are associated with xenotime and monazite, which are closely associated with wolframite, sulfides and muscovite. Monazite is characterized by a clear predominance of cerium over lanthanum and high neodymium contents, variable thorium content, the presence of calcium and the absence of uranium. Feature of xenotime is the wide isomorphism of heavy lanthanides (Dy, Er, Yb, Lu), a high content of ytterbium (up to 19.61%), lutetium (up to 3.28%), the complete absence of thorium and, in only one case, uranium. The predominance of heavy lanthanides over the lungs was revealed in association with a high content of wolframite and sulfides. The conclusion is confirmed that the concentration coefficient of heavy lanthanides increases, depending on a decrease in their ionic radius and independent of their Clarke. This is due, as we identified earlier for the distribution of lanthanides in the wolframite of Sherlova Gora, to the accumulation of heavy REEs in residual melts producing wolframite and the associated monazite and xenotime. This is a consequence of lanthanide compression, the fundamental crystal-chemical property of REE.

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