太行东断裂的性状与分布

Traits and distribution of the east of Taihang mountains

摘要:

分布在太行山东麓的新生代断裂，主要有早第三纪NE 向保定-石家庄断裂带、太行山南端的新生代NNE 向汤东、汤西断裂带，均为倾滑兼右旋走滑断裂。前者经人工地震探查为白垩纪-渐新世早期形成的断裂，之后，在地层中未发现明显的活动记录。后者形成于始新世-第四纪，由错列的汤东、汤西断裂组成，作右阶排列。在断裂间出现反向调节性凸起带———NNE 向大赉店凸起。需特别强调的是，汤东、汤西断裂带活动性很强。而在石家庄-安阳间的山前地带不存在大尺度的新生代断裂，构造上为太行隆起的东斜坡带。

Abstract:

Genozoic faults in the east of Taihang mountains are mainly dominated by early Paleogene NE Baoding-Shijiazhuang fault，Genozoic NNE Tangdong and Tangxi faults in the South Tip of Taihang mountains． They are characterized by dip-slip and dextral displacement movement． The former is thought as Cretaceous-early Oligocene faults by artificial seismic exploration and no evident action in stratums． The latter formed in Eocene-Quaternary and it is composed by stagger Tangdong and Tangxi faults，right-stepping en echelon． Reverse regulatory uplift belt appears in faults，which is NNE Dalaidian uplift． It should be noted that fault activity is intensive in the Tangdong and Tangxi faults． Large-scale genozoic faults do not exist in Shijiazhuang-Anyang piedmont． It is the eastern slope zone of Taihang mountains uplift．