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红3井东侧断层的成因与中拐凸起的形成与演化密切相关,解析其构造几何学与运动学特征对于揭示中拐凸起自晚古生代以来的构造变形具有积极作用,并对于研究区的油气勘探具有重要意义.本文利用断层相关褶皱理论,不整合面识别及平衡剖面的方法,对红3井东侧断层进行精细的构造解析、建模与构造复原.中拐凸起发育白垩系—侏罗系、侏罗系—三叠系、三叠系—上乌尔禾组、上乌尔禾组底界及佳木河组—石炭系5个区域不整合面.研究认为,红3井东侧断层为一断层传播褶皱模型,发育生长三角,平面上分为北段、中段和南段.受海西晚期及燕山期的区域挤压作用的影响,红3井东侧断层在早二叠世末期(P1f末期)至中二叠世晚期(P2w)及早侏罗世晚期(J1s)至晚侏罗世发生两期传播活动,并在中段发生分支,分支断层的断距较小.早期的断层活动在中段最强,南段其次,北段最弱.中-下二叠统被抬升,遭受大面积剥蚀,地层缩短量约为3.8 km.晚期的断层活动微弱,且只发生在中段和北段,地层缩短量约为200 m.红3井东侧断层自北东向南西方向的传播、推覆作用控制了中拐凸起的主体构造形态,整体具有“南北分段、早晚期构造叠加”的特征.“,”The genesis of Hong-3 well eastern fault is closely related to the formation and evolution of the Zhongguai uplift.Analyzing its geometry and kinematics is of great value to reveal the deformation from Late Paleozoic in Zhongguai uplift and to future guild oil-gas prospecting.We do the accurate structure elucidation,structural modeling and reconstruction about Hong-3 well eastern fault by employing unconformity identify,fault-related-fold theory and balanced restoration.There are 5 regional unconformities of Cretaceous-Jurassic,Jurassic-Triassic,Triassic-upper Wuerhe Formation,the bottom of upper Wuerhe Formation and Jiamuhe Formation-Carboniferous.Our study shows that Hong-3 well eastern fault is a fault propagation fold model with the growth triangle.It can be divided into the northern,the middle and the southern sections.Influencing by the compaction of the Late Hercynian and the Yanshanian period,the fault actives in the late Early Permian (Late P1f) to Late Middle Permian (P2w) and the Late Early Jurassic (J1S) to Late Jurassic.The branch fault grows in the middle to the southern part with little throw.The early fault activity is strongest in the middle part,the southern section is the second,and the northern part is the weakest.The Middle and Lower Permian are mostly uplifted and denuded,and the stratigraphic shortening is 3.8 km.But the second activity only happened in the middle and the northern section is very weak with only 200 m stratigraphic shortening.Hong-3 well eastern fault propagates from NE to SW with the characteristics of “3 segments,1 structural superposition” and the napping controls the structural shape of the Zhongguai uplift.