【作者】 林璐；

【导师】 何光玉；

【作者基本信息】 浙江大学 ， 构造地质学， 2010， 硕士

【摘要】 本文依据二维地震剖面的精细地质解释,并结合平衡剖面技术,对准噶尔盆地东北缘青格里底斜坡的中生代构造变形及演化特征进行了研究。准噶尔盆地东北缘青格里底斜坡的构造变形,大致以近东西向的喀拉萨依断层为界分成两大变形区：北部变形区与南部变形区。北部变形区断层数量较多,走向主要为NW向、NNW向与近EW向；而南部变形区断层数量较少,走向主要为NNE向与NE向。剖面上,准噶尔盆地东北缘青格里底斜坡的构造变形,主要表现为“y”字型与反“y”字型断层和断层传播褶皱的构造样式。其中,“y”字型与反“y”字型断层表明该区的构造变形以挤压为主,扭动为辅的特征。上述构造变形主要发生在侏罗纪-白垩纪时期,其中又以中-上侏罗统石树沟群(J2-3sh)沉积末最为强烈,中侏罗统西山窑组(J2x)沉积末次之,下白垩统吐谷鲁群(K1tg)沉积末最弱。更多还原

【Abstract】 Based on the detailed interpretation on 2D seismic profiles anbalanced section technique, the Mesozoic structural deformation and evolution of Qinggelidi Slop in Northeastern Junggar Basin which is are discussed in this paper.On the fault map, there are two deformation areas in Qinggelidi Slop named northern and southern deformation areas, which are divided by the Karasay fault extending EW. The faults in the northern deformation area are dominant and extend NW, NNW and EW. However, the faults in the southern deformation area extend NNE and NE.On the seismic profiles, the structural styles of Qinggelidi Slop are the mainly faults of "y" and reverse "y" shape, as well as fault-propagation folds. This indicates that the compression deformation is more violent than the strike-slip deformation.These structural deformation happened during three main geological periods：the end of sedimentary period of Middle-Upper Jurassic Shishugou Group(J2-3sh), the end of sedimentary period of Middle Jurassic Xishanyao Formation(J2x), and the end of sedimentary period of Lower Cretaceous Tugulu Group(K1tg). The end of sedimentary period of Middle-Upper Jurassic Shishugou Group(J2-3sh) deformation is more violent than those of the latter two stage.更多还原