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地质学报  2006 

库车前陆褶皱-冲断带基底断裂对盐构造形成的影响

, PP. 330-336

Keywords: 盐构造,古隆起,基底断裂,物理模拟,库车前陆―褶皱冲断带,塔里木盆地

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Abstract:

地震剖面解释和构造物理模拟实验表明,库车前陆褶皱―冲断带前古近系基底构造对上覆盐构造的形成演化有重要的控制作用。位于冲断带前缘的秋里塔格构造带西段前古近系基底表现为古隆起形态,并发育有丰富的基底断裂和盐构造。基底断裂大多表现为逆断裂,其走向与地表山系基本一致,倾向主要为NNW和SSE,具有较明显的分段特征。古近系库姆格列木组膏盐层塑性流动变形形成的盐构造主要有盐枕、盐推覆、盐焊接和鱼尾构造等。前古近系基底断裂通过影响古近系库姆格列木组膏盐层的塑性流动方式和平面展布特征,进而控制盐层及上覆层的构造变形过程,最终导致在盐层和上覆层形成了大量形态各异的盐相关构造。

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