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鲜水河断裂带位于四川西北部高原山谷地带,断裂北起炉霍,南至泸定绵延350千米,是一条地震活动频度高、强度大的活动断裂带。是我国著名的走滑断裂之一。它晚更新世以来曾有过多次的活动,很多的资料表明,它是在区域应力场,近东西向压应力为主的条件下,作反时针扭动,并伴随有强震的发生。这里所介绍的一个古地震的剖面,必定有助于我们对这些强震的认识,及其对强震重复性的理解。
The Xianshuihe fault zone is located in the plateau valley of northwestern Sichuan. The fault ruptures northwards and stretches 350 kilometers to the east of Luding. It is an active fault zone with high frequency and intensity of seismic activity. It is one of the famous strike-slip faults in our country. There have been many activities since its late Pleistocene. A lot of information shows that it is anti-clockwise with the occurrence of strong earthquakes under the condition of regional stress field and near-to-east compressive stress. The section of an ancient earthquake described here will certainly help us to understand these strong earthquakes and their understanding of the strong earthquake’s repeatability.