COMPOSITIONAL VARIATIONS IN KIMBERLITES OF THE EAST EUROPEAN PLATFORM AS A MANIFESTATION OF SUBLITHOSPHERIC GEODYNAMIC PROCESSES

Abstract

New high-precision (ICP-MS, Sr, Nd, and Pb isotopic) data together with previously obtained data were used to examine compositional variations in kimberlites, including diamondiferous varieties, of the East European platform (EEP). One of the reasons for these variations is a supposed relation to an ancient megalith, which bears the remains of subducted oceanic lithosphere and has been retained beneath the EEP since ~2 Ga ago.