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In accordance with the hypothesis of cold homogeneous accretion, it is usually assumed that the Earth?s core and mantle resulted from the gravitational separation of iron and silicate particles in its interior. According to this scenario, the core and mantle temperatures should not differ significantly. Therefore, the reason for mantle convection is difficult to explain. Recent data on the rapid accretion of planets, on the existence of magmatic fractionation trends in mantle xenoliths and in rocks of the crystall...

Major genetic concepts currently existing in geology are based on the hypothesis of the Earth?s cold homogeneous accretion put forth in the mid-20th century. The data obtained in the last decades are in conflict with these concepts. It has been found that compositions, isotope ages and formation temperatures of the crustal and mantle rocks are interrelated according to the laws of magmatic differentiation. This indicates that the rocks formed as a result of fractionation of the global magma ocean. Chemical disequi...