The Earth's inner core deviation to plate movement  

作　　者：Dinghua Huang Jinping Wu Yichun Duan Hao Guo Heng Zhang Lingqing Yao Fan Zhang Bin Li Junhui Wang Hongfu Yin 

出　　处：《Chinese Science Bulletin》2001年第19期1585-1589,共5页

基　　金：This work wassupposed by the National Natural Science Foundation of China (Grant No. 49632070) and the Ministry of Land and Resources of China.

摘　　要：Under the premise of the Earth’s layer structure and mass distribution, the solid inner core cannot be stable in the center of the sphere. Thus, the deviation of the inner core is towards the sphere’s center and the liquid outer core must have 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 asymmetrical thermal convection structure in the outer core led by the dislocation of the inner core→the plume is in special upwell position because of differential activation→the formation and split of lithosphere→the split plates drift and assemble in a new location, the mass of which causes the inner core to deviate towards this direction again→the 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 orUnder the premise of the Earth’s layer structure and mass distribution, the solid inner core cannot be stable in the center of the sphere. Thus, the deviation of the inner core is towards the sphere’s center and the liquid outer core must have 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 asymmetrical thermal convection structure in the outer core led by the dislocation of the inner core → the plume is in special upwell position because of differential activation → the formation and split of lithosphere → the split plates drift and assemble in a new location, the mass of which causes the inner core to deviate towards this direction again → the 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.

关 键 词：inner-core’s deviation PLATE novement MANTLE CONVECTION new model of global movement. 

分 类 号：P313[天文地球—固体地球物理学]