红河-哀牢山断裂带——喜山期陆内大型左行走滑剪切带  

THE RED RIVER-AILAOSHAN FAULT ZONE——A HIMALAYAN LARGE SINISTRAL STRIKE-SLIP INTRACONTINENTAL SHEAR ZONE

作　　者：吴海威[1] 张连生[1] 嵇少丞 

机构地区：[1]中国科学院地质研究所

出　　处：《地质科学》1989年第1期1-8,共8页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家科学基金"滇川西部特提斯带岩石圈构造演化"

摘　　要：红河-哀牢山断裂带,由两条主要的糜棱岩带及其所夹的变质岩块体组成,是一条左行走滑韧性剪切带。带内糜棱岩叶理产状多为较陡,拉伸线理近水平。大量的S-C构造、旋转眼球体、多米诺牌式构造和布丁构造,以及断裂带两侧的构造线牵引形态都指示左行剪切。剪切带应变机制复杂,剪切应变值变化较大,估算走滑位移量在200km以上。据地质和同位素年龄资料,推断走滑剪切运动发生在喜山期。The Red River-Ailaoshan fault zone: is situated in the central part of Yunnan Province, southwest China. It extends NW-SE and is a boundary between Yangtze Platform and Sunda-land. In this paper, the main result of study on this fault zone can be summarized as follows:1. The Red River-Ailaoshan fault zone is a ductile shear zone which consists of two main mylonitic belts and the metamorphic rock blocks between them.2. The foliations of the mylonites mostly dip steeply and the stretching lineations are nearly horizontal, therefore, it is strike slip fault.3. The fabrics such as S-C structures, rotated porphyroclast systems, Domino structures, displaced vein, boudinages, and dragged structural lines beside the fault zone, indicate a sinislral slip.4. The shear zones seem to be formed ir. a complicated deformation regime and to undergo an extremely heterogeneous shear strain. The strike slip displacement more than 200 km is preliminarily estimated.5. The geological data and isotopic dating suggest that the strike slip event took place during Himalayan movement.

关 键 词：断裂带 喜山期 左行走滑断裂 

分 类 号：P552[天文地球—构造地质学]