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关于伊通盆地的断裂系统,前人主要研究了边界断裂和盆地内的2号断裂的性质.为了精细地解译盆地内其他断裂的基本性质,利用重力场小子域滤波及三方向小子域滤波技术圈定了14条断裂的平面位置,给出了伊通盆地平面断裂构造格架并描述了主要断裂的重力场特征.在与其他地球物理资料(4条地震剖面和4条电阻率断面)的对比分析中,除证实了已有的断裂外,还验证了利用三方向小子域滤波技术最新发现的一些断裂,证明了该方法技术的有效性.阐述了14条断裂的基本性质,重点研究了盆地内中央断裂的存在性和基本性质.指出中央断裂是与盆地东南缘和西北缘两条断裂同期形成的主要控盆构造;2号断裂向西与西拉木伦断裂相连,盆地南部(2号断裂以南)基底与华北板块有关,北部则属于东北微陆块复合基底.
As to the fault system in the Yitong Basin, the predecessors mainly studied the boundary faults and the properties of the No.2 fault in the basin.In order to finely interpret the basic properties of other faults in the basin, the small subdomain filter and the three-direction small subdomain filter The technique delineates the plane positions of 14 faults and presents the plane fracture tectonic framework of the Yitong basin and describes the gravity field characteristics of the major faults. In contrast with other geophysical data (4 seismic sections and 4 resistivity sections) In the comparative analysis, in addition to confirming the existing fractures, some recent discoveries of the three-directional small subdomain filtering technique were also verified, demonstrating the effectiveness of the proposed method. The basic properties of 14 fractures were expounded, It is pointed out that the central fault is the main controlled basin structure formed at the same time with the two faults in the southeast and the northwestern margin of the basin. The fault No. 2 is connected to the western Lamelun fault to the west and the south part of the basin (2 South of the fault) basement is related to the North China plate, while the northern part belongs to the composite basement of the northeast micro-continent.