【摘要】 龙门山冲断带发育多套滑脱带,如寒武系、志留系、下三叠统嘉陵江组、中三叠统雷口坡组等。通过野外地质调查和地震剖面精细解释,认为在具有滑脱层的构造变形中,滑脱层本身发生强烈的挤压揉皱,使得上下地层发生显著不同的构造变形,深部的构造变形在纵向上形成两个构造体系,其中上部构造变形体系具有强烈的构造变形,形成大量的逆冲断裂带、背冲断块等构造变形样式,而下部构造变形体系则经历较弱的构造变形,地层保存完好,形成分层差异构造变形,地表可以见到特征明显的坡坪式断层、节理发育的断开与连续、逆冲断层的尖灭消失、构造虚脱和弯流褶皱、强烈的褶皱或者揉皱等。更多还原

【Abstract】 Many detachment layer can be found in Longmen Mountain Thrust Belt,such as Cambrian,Silurian,Lower Triassic Jianglingjiang Formation,Middle Triassic Leikoupo Formation and so on.Through field investigationand seismic explanation,we put forward that the detachment layers have an important effect on the deformation,they can experience intense compression and make the adjacent layer have different deformation styles as well,forexample,the layers below the detachment layer may be preserved well,while the upper layers have intense deformation,such as thrust belt,pop-up.Some important styles can be identified in field investigation,such as slope-flatfault,breaking and continuing of the joints,disappearing of the thrust fault,etc.II Journal of Southwest Petroleum University(Science & Technology Edition) Oct.2011更多还原