Structural Traces of Secondary Faults(Fractures) along the Main Faults and Their Reliability as Kinematic Indicators

作     者：Jin ZHANG Jinyi LI Zongjin MA Wenjun REN 

作者机构：Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Institute of Geology China Earthquake Administration Beijing 100029 China Department of Chang Qing Geophysical Survey Geophysical Company Limited China National Petroleum Corporation Xi'an 710000 China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报(英文版))

年 卷 期：2011年第85卷第5期

页      面：1137-1149页

核心收录：

学科分类：070904[理学-构造地质学] 0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0816[工学-测绘科学与技术] 

基　　金：funded by the National Basic Research Progam of China(Nos. 2007CB411306 and 2001CB409810) China Geological Survey(No.1212010611806) the National Natural Science Foundation of China(No.40702032) 

主　　题：secondary fracture/fault kinematic indicator fault surface fluctuation 

摘      要：Secondary/minor structures occurring along the main fault surfaces are important indicators for judging the kinematic characteristics of faults.However,many factors can lead to the formation of these structures,which results in the difficulty for rapid judgment and application in the fields.A series of secondary faults/fractures developed due to the movement of main faults are the most important and widespread phenomena in the scope of brittle deformation.The morphology of the main fault surfaces is various,and former researchers mainly discussed the structures on the main even fault surfaces. However,the fluctuation of fault surfaces is the intrinsic character of the faults,and the intersection between the main fault and secondary faults/fractures can produce a series of kinematic indicators on the main fault surfaces.Based on previous studies and our observations,i.***.the structural traces of the P,R,R ,T and X shears/faults along the main faults,some indicators which are rarely reported previously,are described in the paper.Furthermore,their reliabilities are also discussed,and more practical and reliable criteria are brought forward.We suggest that the simple application of congruous and incongruous steps without knowing their exact origins should be abandoned in the fields,and several types of indicators along one fault surface should be checked with each other as much as possible.Meanwhile,the origins of some other arcuate indicators on the fault surfaces are also discussed,and new models are brought forward.