摘要
由于较大的质量和较高的重心，大陆的离心力矩大于大洋。这使大陆向赤道漂移。在此漂移过程中，岩石圈的转动惯量越来越大，转速随之越来越慢。这就是大陆车阀假说。当岩石圈的转速变慢，软流圈和地核的转速相对变快，使它们在赤道处升起，在两极处下降。由此产生的软流圈和液核中的向极流使大陆离开赤道向两极集中。同时，岩石圈的转动惯量变得越来越小，转速也随之越来越大。这两种效应交替，使大陆在赤道和两极间不断地往返运移。
Because of more mass and higher center of gravity, the centrifugal torque of the continent is bigger than the ocean's.It makes the continent drift to equator.When the continent drifting, the lithosphere's moment of inertia grows bigger and bigger, and it will rotate slower and slower, this is the continental stopping hypothesis. When the lithosphere rotates more slowly,the core and mantle rotate faster than the listhosphere.It makes the outcore rise up in the equator zone and fall down in te pole areas. We call it action of centrifugal pumps. There is the same action in the thenosphere.This pole-wards convection of mantle and outcore make the continent drift to the poles. At the same time, the lithosphere's moment of inertia gets smaller and smaller, and it will rotate faster and faster. So the continents drift between the pole and equator again and again.
出处
《地壳形变与地震》
CSCD
1996年第2期78-84,共7页
Crustal Deformation and Earthquake
