【摘要】 内蒙古临河—集宁断裂带是华北地台北缘的一条重要断裂带,对其中段沙湾子—大老虎店段进行了重点解剖。依据区域地质资料和地球物理场特征,结合构造形迹特征,对该断裂带的构造演化进行研究并探讨了其大地构造意义。该断裂带在航磁、重力及深震剖面上都有明显的反映。对断裂带上韧性剪切带、碎裂岩带、推覆构造、断层、褶皱等构造形迹的研究表明,该断裂带是一条自新太古代至今长期活动的构造活动带,控制着该区地质构造的形成与演化。更多还原

【Abstract】 The Linhe-Jining fault belt is an important fault belt on the northern margin of the North China platform. In this paper the authors mainly analyze the Shawanzi-Dalaohudian segment in its central part. On the basis of the regional geological data and geophysical characteristics, combined with the characteristics of tectonic features, the authors have studied the tectonic evolution of this fault belt and discuss its tectonic significance. This fault belt is well displayed on the aeromagnetic, gravity and deep seismic profiles. Studies of such tectonic features as the ductile shear zone, cataclastic rock zone, nappe structure, faults and folds suggest that this fault belt is a long active mobile belt that have been active from the Neo archean to the present and has long controlled the formation and evolution of the geological structures in the study area.更多还原