滇西怒江断裂带新构造特征

怒江断裂带从走向上可以分为南北走向段和北东走向段，其喜马拉雅期的构造变形以右行剪切为主导。右行剪切的变形历史可以分为早期压剪变形和晚期张剪变形两个大的阶段。这两期变形各自在南北走向段和北东走向段表现出不同的特点。总之，怒江断裂带喜马拉雅期构造变形具有时空不均一性的特点

NEOTECTONIC FEATURE OF THE NUJIANG FAULT ZONE IN WESTERN YUNNAN

The Nujiang fault zone can be divided into two sections of SN and NE strike and is arc in plane. Its deformation is mainly dextral shear of Himalayan age which could be divided into transpression deformation in early stage and transtension deformation in late stage and has different characteristics in two sections. The transpression structure in early stage has developed mylonite zone and its plunge angle of lineation was different in two sections. In the section of NE strike, both doxtral shear and thrusting are quite clear. The transtension structure in late stage developed mainly in southern end of two sections and shaved progressive trend from south to north since Miocene epoch according to distribution characteristic of the oldest stratum in basin. The complexity of Nujiang fault zone in Himalayan age was caused by the inhomogeneity of deformation in time and space. These deformation features are described and analysed in detail in the paper.