【摘要】 准噶尔盆地东北部乌伦古坳陷内的断裂主要发育在坳陷周缘和中部,平面上以北西-南东向、北北西向和近东西向逆冲-走滑断层为主,地震剖面上显示为基底卷入型断层。存在坡坪式、叠瓦式、双重式、背冲式、对冲式等多种逆冲推覆构造样式。研究区内断裂的生长指数揭示主要断裂以及断裂体系其中生代活动强度具有横向和纵向的迁移规律:横向上,东早西晚,有自东向西的拓展演化规律;纵向上,主控断裂随时间由红盆断裂依次向红盆南断裂、喀拉萨依断裂转变,断裂活动中心由北东到南西迁移。西北部变形较东南部变形弱,受力方向来自北东和南东方向。更多还原

【Abstract】 Faults of the Wulungu Depression in northeastern Junggar Basin develop mainly in the peripheral and central depression,shown as NW—SE,NNW and EW direction thrust and strike-slip faults on the plane,basement-involved faults on seismic profiles.There are many types of the thrust nappe structure such as flat-ramp,imbricated,duplex,divergent and convergent thrusts.Growth index of faults in this area reveals that the major faults and the fault system are with both horizontal and vertical migration law in their Mesozoic active intensity.Horizontally,the East is earlier than the West,its evolution is from east to west.Vertically,with time passed by,the main fault turn from the Hongpen fault to the Hongpen South fault and the Karasay fault.And the activity center migrated from NE to SW.The Northwest is weaker than the southeast on deformation,so the force comes from the Northeast and Southeast area.更多还原