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地质学报  2007 

准噶尔盆地南缘构造变形特征及其主控因素

, PP. 151-157

Keywords: 准噶尔盆地南缘,构造,构造样式,构造形成时间,变形主控因素

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Abstract:

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。

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