合肥盆地重磁场的解析延拓对深部构造分析的意义

THE ANALYTIC CONTINUATION OF GRAVITY-MAGNETIC FIELD OF HEFEI BASIN AND THEIR SIGNIFICANCE TO THE STUDY OF DEEP STRUCTURE

深部地质情况的探查已日益为人们所重视.本文应用重磁解析延拓的成果,参考其他资料,对隐伏断裂的力学性质和纵深延展的变化进行了探讨.根据主要隐伏断裂的构造格架及其所处深度,全区可依次划分为东西向构造带,南北向构造带和北北东向郯庐断裂带.全区地质体最主要的运动方式,表现为郯庐断裂带两侧地体的左行平错扭动,东西向构造地体层在南北向构造地体层之上发生挤压推复作用

It seems that studies of the deeper geological conditions are, now, attracting more attention. Based on the result obtained from the analytic continuation of gravity-magnetic and other materials, the changes of the tectonic aspects and depth extension of the deep buried faults have been discussed in this paper. Based on the general tectonic framework of the buried faults and their depths, the area taken as a whole could be divided as the east-west and north-south tectonic zones and the Tan-Lu fault zone. The most important tectonic pattern in the whole area appears as, (1)Left-lateral horizontal movement on both sides of the Tan-Lu fault zone; (2) the overthrust process caused by compression of the east-west tectonic zone on the north-south tectonic zone.