【摘要】 2008年5月12日汶川8.0级地震发生后,笔者在总结前人研究成果的基础上,结合野外实地考察,对龙门山演化历史和构造样式等方面进行了综述。研究表明,龙门山构造带经历了基底形成期、扬子地台裂解期、构造反转-褶皱隆升期和推覆滑覆叠加期四个演化阶段,同时具有东西分带、南北分段、上下分层的构造变形特点,发育大量的构造样式,如叠瓦冲断带、花状构造、背冲断层、断滑褶皱等,并且具有推覆滑覆多期叠加的特征。该研究有利于推动对造山带构造演化规律的研究,同时对汶川地震发震构造环境和青藏高原边缘动力学环境研究有着重要的意义。更多还原

【Abstract】 To understand the seismogenic environment of MS8.0 Wenchuan earthquake,the authors review the achievements in the research of Longmenshan Tectonic Belt,especially the evolutionary history and tectonic style based on field investigations. This study indicates that the Longmenshan Tectonic Belt experienced four evolutionary stages,i.e.,floor formation stage,continental breaking-up stage,tectonic inversion-folding stage,and thrusting-gliding stage. Typically the tectonic deformation style displays zonation from west to east,segmentation from north to south,and layering from top down,and including lots of tectonic styles,such as imbricate thrust belt,flower structure,backthrust,fault related fold belt. This study is beneficial to promote the research of orogenic belt and is of great significance to the seismogenic structure of Wenchuan earthquake and dynamic mechanism of the margin of the Tibetan Plateau.更多还原