MANTLE PLUME TECTONICS AND THERMAL ENERGY OF THE CORE
Yang Xuexiang and Chen Dianyou(Chngchun University of Earth Sciences,Changchun 130026)
The pressure and the temperature In the core are higher than that be imagined. In the center of the earth, both the pressure and adiabatic temperature are infinite. The core heats the parts of the lower mantle.The heated parts of the lower mantle rise through the mantle and form mantle plumes.Some of them break through the lithosphere and form hotspots at the surface of the earth,the others vanish In the upper mantle and form hotcell. It is the reason why the upper mantle is inhomogeneous in composition and temperature.