LITHOSPHERIC MANTLE COMPOSITION AND STRUCTURE VARIATIONS UNDER THE SIBERIAN PLATFORM KIMBERLITE FIELDS OF DIFFERENT AGES

We discuss herein the differences both in composition and structure of lithospheric mantle Siberian Platform under kimberlite fields different ages. Having analyzed pyrope garnets from kimberlites ages this study aimed to identify genesis, extent probable causes for evolution within various SP blocks. Acquired results revealed noticeable lithosphere thickness blocks Middle Paleozoic Mesozoic, as well same time. It was found, that greatest individual are typical Paleozoic. The obtained sedimentary secondary collectors used get direct evidence on existence thick (230–240 km) southern margin Olenek uplift, north south Kyutyungde trough, western eastern margins Udzhinsky uplift. Significant variations intensity silicate-type metasomatism were identified by investigating pyropes peridotites mantle, sampled Triassic fields. Direct indicates high prospects discovering new diamondiferous high-grade age some areas Platform, primarily its Arctic region.