The nature of the evolution of magmatism in the history of the Earth

Numerous evidences of hot heterogeneous accretion the Earth have been obtained. According to these data, Early Precambrian crystalline complexes and acidic crust were resulted from emerging residual melts formed by low-pressure compression fractionation bottom parts early magmatic ocean. The rise various layers ocean, crystallized top bottom, caused evolution magmatism ancient platforms basic, then alkaline-ultrabasic kimberlite. warming mantle initially core led appearance a direct geothermal gradient in it at end Neoproterozoic beginning plumes. Under their influence, oceanic subduction environments formed. Magmas them are as result frictional decompression melting differentiates