汶川大地震较大地改造了西部的地质形态,了解震前区域内的地质情况,对研究本次地震所产生的影响有着重要的指示意义。龙门山北段竹园坝——马鹿坝一带位于青川县南部,是受强震影响的地区之一。此区域在震前主要受天井山大背斜的影响,构造情况较为简单,以节理为主,为较好地保留地震时期的构造现象提供了条件。 The Wenchuan Earthquake greatly transformed the geological pattern of the western region. Understanding the geological conditions in the pre-earthquake area is of great significance in studying the impact of this earthquake. Longmen Shanbei Chuk Yuen Dam - Red deer dam area is located in southern Qingchuan County, is affected by strong earthquakes in one of the areas. Before the earthquake, this area was mainly affected by the Aishan Mountain anticline. The tectonic situation was relatively simple and mainly composed of joints, which provided the conditions for retaining the tectonic phenomena during the earthquake.