【摘要】 本文讨论了五桂山地区断裂构造特征及断隆区的形成和发展.指出本区的主要断裂系统有NE、NNE 及NW 向三组,受燕山期及喜山期板块碰撞的影响,断裂力学性质发生压剪性→张剪性的重复或交替,新构造期均演变为张性正断层.受三组不同方向活动断裂围限的五桂山断隆区,新构造时期的间歇上隆,形成五级夷平面.次级断陷三乡盆地可能形成于晚更新世或稍早些.断隆区内的次级断陷带是地热异常带.查明三组不同方向断裂的交切关系,对寻找新的地热区具有重要意义.更多还原

【Abstract】 There are three sets of faults developed in Wugui Mountain area,the NE,theNNE and the NW.Effected by the plate collision during the Yanshan period andHimalayan period,natures of the faults have repeatly changed from compression—shear to tension—shear.All the faults have become normal faults during theneotectonic period.The fault-block uplifted area of Wugui Mountain bounded bythree sets of faults in different directions has uplifted intermittently during theneotectonic period,forming five erosion surfaces.The secondary fault-depressionwas formed in late Pleistocene or a little bit earlier.The secondary depressionwithin the Wugui Mountain fault-uplifted area is a thermo-anomalous belt.Re-search on how the three sets of faults cut off each other is of importance in loo-king for new thermal areas.更多还原