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经过近年来地球物理和地质相结合的研究,已经知道地球不仅可沿着垂向分成若干壳层,而且这些壳层沿着横向还可划分为若干块体.它们的厚度、化学成分和物理力学性质都不尽然一样,因此地球无论从整体或局部来看,都不能认为它是均一的.这个基本认识对于我们研究地质构造的力学成因非常重要,因为应力的集中和释放都是在材料不均一的地方.
After the recent research on the combination of geophysics and geology, it is known that the earth can not only be divided into several shells along the vertical direction, but also divided into several blocks along the horizontal direction. Their thickness, chemical composition and physical mechanics The nature is not always the same, so the earth can not be considered as homogeneous or partial, and the basic understanding of this is very important for us to study the mechanics of geological structure, because the concentration and release of stress are all in the same material local.