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地球学报  2006 

大巴山侏罗纪叠加褶皱与侏罗纪前陆

DOI: 10.3975/cagsb.2006.05.03

Keywords: 叠加褶皱,古应力场,侏罗纪前陆,大巴山

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Abstract:

大巴山是NWW_SEE走向的中央造山带中惟一的向南凸出大型弧型褶皱带,与秦岭—大别造山带的构造特征明显不协调。研究表明,大巴山弧型构造卷入了侏罗纪地层,因此不属于三叠纪中央造山带。秦岭、大别山和大巴山最新的证据证实侏罗纪曾经发生陆内俯冲作用,大巴山是侏罗纪陆内造山作用的产物。大巴山西侧为典型的叠加褶皱变形样式,三叠纪近东西向褶皱叠加上近南北向褶皱构成横跨型干涉变形图像。由此,确立了侏罗纪复合前陆的存在,证明中国东部甚至亚洲东部侏罗纪陆内造山的广泛性,晚侏罗世的“燕山运动”是波及亚洲中东部的重要构造事件。

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