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发表于 2009-1-16 19:11
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本帖最后由 lhkcc58 于 2009-1-16 19:13 编辑
A type of fault formed when the hanging wall fault block moves up along a fault surface relative to the footwall. Such movement can occur in areas where the Earth's crust is compressed. A thrust fault, sometimes called an overthrust if the displacement is particularly great, is a reverse fault in which the fault plane has a shallow dip, typically much less than 45o.
第一图为正冲,第二图为逆冲,第三图为横向错动。
原来,顺坡下滑为正冲,逆坡上爬为逆冲。正冲为张应力的释放,而逆冲是应力释放的结果。
如果汶川地震主要是逆冲的结果,那它的应力聚集必定是向西偏南一点点累积起来的。 |
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