关键词: 断裂带, 变形, 喜马拉雅期, 云南

Abstract: 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.

Key words: Fractur zone, Deformation, Himalayan age, Yunnan