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

摘要： 滇东南楔形构造区的区域断裂几何结构突出地表现为半棋盘格式。具有区域应力场分界意义的红河断裂,把其它几条断裂限制在其北部,并与小江断裂带构成第一级的半断块。构造区内,曲江断裂被李浩寨断裂限制在其西侧;后者与异龙湖断裂交汇于建水盆地中;建水断裂把黑泥地断裂限制于其东,并与李浩寨断裂构成建水盆地右阶拉分岩桥区,向南终止于山花。 深部构造、区域形变及断裂活动表明该构造区是一个断块挤压隆起构造区。最后,对楔形构造区的地震活动与挤压隆起断块运动的关系作了简要的分析。

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