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地球学报  2007 

柴达木盆地北缘北西(西)向断裂及其油气地质意义

DOI: 10.3975/cagsb.2007.03.07

Keywords: 柴达木盆地北缘,北西(西)向断裂,构造样式,油气地质意义

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Abstract:

柴达木盆地的重力、地震等资料显示,柴达木盆地北缘发育众多的北西(西)向断裂构造带.平面上,这些断裂带自北向南成排成带展布,与重力异常反映的构造格局具有很好的对应关系,控制着褶皱带的走向和发育;剖面上,这些断裂表现为上、下"两层楼"式结构,分别控制着上、下第三系的沉积与演化.研究表明,北西(西)向断裂带对区内油气的聚集与成藏具有重要的控制作用:①烃源岩的展布明显受北西(西)向断裂的控制;②形成多种与断层有关的构造样式,圈闭类型以与逆断层有关的断背斜和断块型构造圈闭为主;③既可作为油气运移的通道,也可作为油气

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