【摘要】 本文通过地面地质调查和地震资料的构造解释,研究了准噶尔盆地南缘构造变形特点及变形主控因素。认为准噶尔盆地南缘构造变形具有南北分带、东西分段和上下分层的变形特点,构造样式为逆冲断层相关褶皱,包括断冲褶皱、断展褶皱、滑脱褶皱、断弯褶皱和断束褶皱。构造形成时间主要是在第四纪,其中喜马拉雅运动Ⅲ幕主要影响到变形后缘山前推举带的变形,早更新世末期的新构造运动使准噶尔盆地南缘全面变形,形成现今构造格局。研究证明,在构造变形中起决定作用的是侏罗系煤层,其分布范围决定了变形范围,其厚度决定了变形强度和应力向前传递的远近程度。更多还原

【Abstract】 Based on the field work and interpretation of seismic profiles, the deformation characteristics in the southern margin of the Junggar Basin and their controlling factors are discussed. The deformation in the southern margin of the Junggar Basin is characterized by zonation from the south to the north, segmentation from the west to the east, and layering from the deep to the shallow. The tectonic styles formed are fault-associated folds, including break-thrust folds, fault-propagation folds, detachment folds, fault-bend folds, and fault-arrest folds. The structures were formed mainly in the Quaternary. The third episode of the Himalayan movement affected the trailing edge of the deformation belt, and the movement at the end of the early Pleistocene led the southern margin of the Junggar Basin to deform completely. It has been proved that the coal layer in the Jurassic system played a very important role in the deformation. Its distribution range determined the deformation range, and its thickness determined both the intensity of deformation and the transmission distance of the tectonic stress.更多还原