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本文通过蒙自五里冲水库库区构造岩动力学研究，配合年代学测定，得出区内最晚一次强烈构造活动的主压应力轴方向为北西向，断裂的活动方式以左旋剪切为主。
Based on the study of tectonic rock dynamics in the reservoir area of Mengli Wulichong Reservoir and the dating of the chronostratigraphy, it is concluded that the direction of the principal compressive stress axis of the latest intense tectonic activity in the area is northwestward and that the activity mode of the fault is left-shear the Lord.