关键词: 滇东南, 楔形构造区, 几何组合, 区域形变, 断块运动模型

Abstract: The wedge tectonic region,in which there are complex features of fault geometry and strong seismicity,is a special tectonic location.This location is a interlock region of the Honghe fault zone and Xiaojiang fault zone in southeastern Yunnan Province.First,a detailed discussion is griven geometric characteristics of main active faults in wedge tectonic region:Qujiang fault and Lihaozhai fault interlock in Qujiang basin in the shape of "┤",the former is confined at the western side of the later;Jian-shui pull-apart area is formed by right-lateral range of Lihaozhai fault and Jianshui fault,in which the former interlocks with Yilonghu fault in Jianshui basin and Heinidi fault is confined at the eastern side of the later.Jianshui fault is replaced gradely by fragment breccia zone on southern segment,ending at Shanhua on the northern side of Honghe fault.These faults are confined on the northern side of Honghe fault zone which is the dividing line of first class tectonic unit.Second,after the analysis of the types of deformation combination,the block movement model has been established,and the dynamic mechanism of this model has been explained.Finally,the analysis of the relationship between fault-block movement and seis-misity has been made.

Key words: Southeastern Yunnan Province, Wedge tectonic region, Geometric combination, Reginal deformation, Mode of fault-block movement