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地质通报  2002 

中蒙边界地区晚中生代伸展盆地的结构、演化和成因

, PP. 224-231

Keywords: 晚中生代伸展盆地重力塌陷中蒙边界地区成因机制伸展作用

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Abstract:

中蒙边界地区在侏罗世晚期-早白垩世发育一个广阔的伸展盆地体系,内部由许多不同规模的次级盆地所组成。盆地体系大致经历了两个发展阶段,早期阶段普遍发育相互独立的次级盆地,而晚期阶段则发生以次级盆地侧向相互连接为特征。相互连通的次级盆地进一步演化为大型次级盆地,形成盆地体系内的沉积和沉降中心,并在平面上呈条带状。与此同时,由于应力逐渐集中在大型次级盆地边界断层之上,处于应力影中的次级盆地停止发育。中蒙边界地区晚中生代的伸展盆地体系的形成与地壳浅部的伸展作用有关,动力学成因机制很可能与增厚岩石圈的重力垮塌有关。

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