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目前,对龙门山冲断带内横断层研究较为薄弱.在综合分析区域地质和地球物理资料的基础上,利用野外考察和构造物理模拟等方法,对龙门山冲断带横断层成因类型及地质意义进行了探析.研究表明:(1)龙门山断裂带中北段主要发育6条横向断层,其中虎牙横断层为中段与北段的分界,卧龙-怀远横断层为中段与南段的分界;(2)横向断层主要有3种成因类型:先存北西向断裂或薄弱带再活化、主断裂带差异逆冲产生的撕裂(调节)断层、X共轭剪切断层和横张断裂;(3)横断层调节了冲断带各段构造活动性、构造变形强度等多方面的差异,其可以独立发震、使龙门山主断裂带分段发震、与主逆冲断裂联合发震、在主震发生后控制余震分布、引发余震等.
At present, the research on the transverse faults in the Longmen Shan thrust belt is relatively weak.On the basis of the comprehensive analysis of the regional geology and geophysical data, by means of field investigation and tectonic physical simulation, The research shows that: (1) There are 6 major lateral faults in the middle and northern part of the Longmenshan fault zone, of which the Horseshoe cross section is the boundary between the middle section and the northern section, Wolong - Huaiyuan section is the boundary between the middle section and the southern section, (2) There are three main types of lateral faults: pre-existing NW-trending faults or reactivation of weak zones, tearing (adjustment) faults caused by differential thrusts in main faults, X-linked shear faults and transverse faults; 3) The transverse fault adjusts the tectonic activity and tectonic deformation intensity of various sections of the thrust belt, which can generate seismogenic waves independently so that the main fault zone of the Longmen Shan seismogenic occurs in sync with the main thrust fault, After the occurrence of the main shock control aftershocks, trigger aftershocks and so on.