ABSTRACT

It is known that REE began to be used as geochemical indicators for the diagnosis and classification of magmatic, metamorphic and metasomatic rocks and their minerals, as well as for reconstructions of the processes of their formation as developed the analytical methods for determining its quite low concentrations in the analyzed samples. At present, the analysis of REE in geological objects became a rather routine procedure even while studying the ultramafic and mafic rocks and minerals depleted by them. Due to this reason, the rare contemporary publications on the problems of Geochemistry, Mineralogy, Petrology of magmatic rocks and geodynamics do not use the results of REE analysis by one of the existing analytical methods. The same trend is approximately observed with respect to platinum group elements (PGE), the determination of relatively low concentrations of which became possible with the introduction of several new analytical techniques including ICP-MS method.