Genesis of peculiarities of geological processes in early Pre-Cambrian

Actuality of the article is determined by necessity of elucidation of nature of ancient geological processes for determination of genesis of Pre-Cambrian deposits. Object of study was published data about ancient rocks of world and about Aldan shield. It was shown that in early Pre-Cambrian layered magma ocean existed on the Earth. The crystalline crust was resulted from crystallization of its acid layer. It covered all the Earth. Late tectonic deformations decreased its area. The magmas was resulted from ascent residual melts from magma ocean and from basic magma chambers in mantle plumes. Magmas were not formed as a result of partial melting. Due to rise of temperature during accretion, the temperature of lower mantle was less than upper mantle during early Pre-Cambrian. Therefore mantle plumes were not formed.