core-mantle
2.On the basis of outlining the basic features of CMB, this paper presents systematical summaries of the research results and related problems on the following aspects:the material chemical reactions and forming of D" layer, mass transfer between core and mantle; heat transfer from core to mantle and their contribution to mantle convection; and core-mantle coupling and angular momentum transferring.
3.This expulsion creates a pair of flux patches where the ends of the loop cross the core-mantle boundary.
4.(1975) are compared. Fourthly, the boundary layer flow at the core-mantle boundary(CMB) and the viscous torque acting to the mantle are deduced as a supplyment of Guo(1989).
5.The elasto-gravitational deformation responses of the Earth to thesolar-luni tidal forces, surface tractions and the perturbations of the pressure and gravity on the core-mantle boundary (CMB) and the solid inner core boundary (ICB) due to the dynamical behaviors of the FOC, are systematically discussed.
6.The lateral heterogeneity is mainly found in the upper mantle, while the lower mantle and the outer core of liquid state seem to be relatively homogeneous. The core mantle boundary (CMB) transition zone (D″), however, is most likely a heterogeneous chemical boundary layer embedded in a thermal boundary layer, with a temperature drop of several hundred degrees, where its topographic undulation and lateral heterogeneity will affect the spherical symmetry of the Earth model.
7.Viewed at the surface of the model earth, the reversal of the dipole occurred when the reversed flux patches begin to dominate the original polarity on the core-mantle boundary.
8.Based on the former workers′ study results such as numerical simulation of fluid mechanics, seismic tomography of the whole earth and igneous rocks, the basic characte- ristics of mantle plumes are summarized in detail, namely the mantle plume, from the D″ layer near the core-mantle boundary (CMB) 2 900 km deep, is characterized by the shape of large head and thin narrow conduit, by the physical property of high temperature and low viscosity.
