Upper mantle differentiation and homogenization processes: new model on Sm-Nd isotopic data basis

The hypothesis is proposed making it possible through isotope-geochemical methods (Sm-Na) to identify the periodicity of differentiation and homogenization processes in the upper mantel; correlate the degree of crust transformation in geological time and adjust them to modern geological-tectonic notions on the Earth development, reveal the genetic sense of the most important stages in the formation and development of its upper mantels