岩石圈运动激发机制的动力学分析

Dynamic Analysis of Excitation Mechanism of the lithosphere Movement

本文把地幔和岩石圈看作统一的动力学系统，分析了岩石圈运动极型场、环型场的激发机制和动力来源。结果表明，岩石圈运动极型场既可在岩石圈内部重力、热力、科里奥利力以及应力的作用下产生，又能由地幔自由热运动所激发；而岩石圈运动环型场仅与地球的转动效应和岩石圈不同块体间的旋转剪切运动有关。在岩石圈演化历史上，上述不同性质力源的相对强弱和作用方式，决定了岩石圈运动的性质及其驱动机制。

,The paper takes the mantle and the lithosphere as one uniform dynamics system, and the excitation mechanism and dynamic source of the poloidal and toroidal fields of the lithosphere movement are analyzed. The results show that the poloidal component is generated not only by gravitational force, thermal force and coriolis force as well as stress, but also by the purely mantle's free thermal movement, the toroidal field is only related to the rotation domino effect of earth and the rotation shear movement between the various blocks of lithosphere. In evolution history of he lithosphere, the relative strength and acting way of the above forces determine the characteristics and driving mechanism of the lithosphere movement.