HR: 0800h
AN: DI31A-0265    [Abstracts]
TI: The Earth's inner core deviation to plate movement
AU: * Huang, D
EM: hdhua@cug.edu.cn
AF: Jinping Wu, 388# Lumo Road, Wuhan, Hub 430074, China
AB: Under the premise of the Earth's spherical structure and mass distribution, the solid inner core cannot be stable in the center of the Earth. Thus, the deviation of the inner core is towards the sphere's barycenter and the liquid outer core must be brought about asymmetrical thermal convection. Based on the two suggestions, a concise and self-consistent global motion model can be built. The model consists of the following cycle: an asymmetrial thermal convection structure in the outer core led by the dislocation of the inner core¡úthe plume is in special upwell position because of differencial activation¡úthe formation and split of lithosphere¡úthe split plates drift and assemble in a new location, the mass of which causes the inner core to deviate towards the direction again¡úthe new asymmetry is formed. As this circulation continues, a definite and periodical motion emerges/forms. Its nonlinear features result in the Earth's motion with simple mechanisms but complex behavior. Ultraterrestrial events may disturb or even interrupt this movement but would not significantly affect the cycle forever.
DE: 8121 Dynamics: convection currents, and mantle plumes
SC: Study of the Earth's Deep Interior [DI]
MN: 2007 Fall Meeting