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为了确定玉北三维区撕裂断层的形成机制,利用构造要素相关性分析及构造解析方法,通过三维地震资料解释,揭示了玉北三维区撕裂断层的构造变形特征,确定了研究区撕裂断层的形成演化模式.结果表明:玉北三维区发育的撕裂断层在地震剖面上表现为高陡断裂带,具有明显的花状构造特征.根据撕裂断层两侧断块运动方向和断块间的相对运动方向,可以将玉北三维区发育的撕裂断层分为单侧逆冲型和同向差异逆冲型两种类型.这些撕裂断层的形成演化明显受基底断层和区域挤压应力的控制.先存基底断层控制后期撕裂断层的发育位置和展布方向,区域挤压应力在基底断层两侧造成的位移变形量差异为撕裂断层的形成提供了动力来源.
In order to confirm the formation mechanism of the tearing fault in the 3D area of Yubei, tectonic deformation characteristics of the tearing fault in the 3D area of Yubei were revealed by the correlation analysis of structural elements and the tectonic resolution method. The results show that the tearing fault developed in the three-dimensional area of Yubei shows high-steep fault zone on the seismic section with obvious flower-like structure.According to the movement direction of the fault blocks and the fault blocks The tearing faults developed in the three-dimensional area of Yubei can be divided into two types: unilateral thrusting and the same-direction differential thrusting.The formation and evolution of these tectonic faults are obviously affected by basal faults and regional compression The control of stress The development and tending direction of the late tectonic fault controlled by the pre-existing basement fault and the difference of displacement deformation caused by regional compressive stress on both sides of the basement fault provide the power source for the formation of tearing fault.