华熊地块马超营断裂走滑特征及演化

对华熊地块南部的马超营断裂带的几何样式、组成特征及其变形特点等研究结果表明，马超营断裂带经历了韧性变形和脆性变形期。韧性变形分布于该断裂带的南侧，并发生了绿片岩相的动力变质作用，其中的S-C组构特征所指示的运动方向在其南北两侧，分别为向南和向北逆冲，呈现正花状特点，反映了该断裂带具有走滑逆冲性质的断裂。韧性变形主要发生于前印支期。燕山期，全面陆-陆碰撞期间其主要表现为脆性变形特征。脆性变形主要发育于其北侧，北东向的康山-七里坪断裂、红庄-陶村断裂是其次一级的派生断裂。通过对北东向断裂运动方向和前人的成果分析，以及这些构造的平面分布样式对比认为该断裂为一条左行走滑特征的断裂带。在此基础上，结合区域动力学背景，进而讨论了它的演化特征。

Strik-Slip Features of the Machaoying Fault Zone and Its Evolution in the Huaxiong Terrane, Southern North China Craton

The authors describe the geometry and deformation features of the Machaoying fault zone in the Huaxiong terrane,southern margin of North China Craton.The Machaoying fault underwent ductile and brittle deformation stages.Ductile deformation mainly occurs in the southern area of the fault zone with greenschist facies metamorphism.Movement sense of the overthrust indicated by S-C fabrics in the fault zone is toward south in the southern part and toward north in the northern part,respectively.This positive flower pattern indicates that the fault is a typical strike-slip fault with thrusting feature.The ductile deformation happened likely in the pre-Yanshanian epoch.The brittle deformation mainly occurred in the nouthern part during continent-continent collision in the Yanshanian epoch.NE trending Kangshan-Qiliping and Hongzhuang-Taocun faults are subsidiary shear fractures of the Machaoying strike-slip fault.Combining with the previous studies the movement sense of the NE trending faults and their distribution patterns suggest that the Machaoying fault is a sinistral strike-slip fault.Based on the dynamics of geological setting the evolution of the fault zone in the area has been discussed.