软流层中的地幔物质由于热量增加,密度减小,体积膨胀,产生上升热流,上升的地幔物质遇到地壳底部向四周分流,随着温度下降,地幔物质密度增大,又沉降到地幔中,这一过程称为地幔对流。
数值实验是地幔对流研究的基本方法。
Numerical experiment is a basic method in the study of Earth's mantle convection.
最后,着重讨论了上地幔与全地幔对流的论争。
The issue of upper vs whole mantle convection is critically discussed.
至今还没有完整理论阐明板块运动的驱动力和地幔对流机制。
No comprehensive theory accounts satisfactorily for the driven force of plate motion and mechanism of mantle convection.
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