新疆中天山北缘胜利达坂韧性剪切带

胜利达坂韧性剪切带沿中天山构造带北缘呈近EW向展布,为一条由一系列糜棱岩带、强片理化带及典型韧性变形显微构造所组成的强应变带。根据变形强度和原岩类型可划分出不同的构造带。显微构造的运动学和动力学分析表明,剪切带经历了早期的由南向北的斜冲推覆剪切及晚期的近水平右行走滑剪切。剪切带内发生了强烈的硅化、碳酸盐化、黄铁矿化、绢云母化和绿泥石化等蚀变,它们与金矿成矿作用关系密切。

SHENGLI DABAN DUCTILE SHEAR ZONE ON THE NORTHERN MARGIN OF THE CENTRAL TIANSHAN TECTONIC BELT,XINJIANG

The Shengli Daban ductile shear zone occurs along the northern margin of the Central Tianshan tectonic belt near EW-trending in the Shengli Daban region. It is a zone of intensive strain which is characterised by a series of mylonite zones ,intensive schistositization zones and typical microstructures of ductile deformation. According to the intensity of deformation and the pattern of protolith .the shear zone can be divided into different tectonite zones. Kinematic and dynamic analysis of the microstructures indicates an early period of northward overthrusting followed by a late regime dominated by nearly horizontal dextral strike-slip faulting. Intense alteration of silicification.carbonatization,pyritization, seriatization and chloritization occurred in the shear zone. These processes are closely associated with the gold mineralization.