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太行东断裂的性状与分布
于慎谔, 赵俊香, 杨承先
中国地震局地壳应力研究所,北京市德外西三旗100085
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。
关键词:  太行东  新生代断裂  倾滑兼右旋走滑  隆起  断裂活动性
DOI:
分类号:
基金项目:地震行业科研专项(200908001)、中央级公益性科研院所基本科研专项(ZDJ2010-24,ZDJ2007-14)共同资助
Traits and distribution of the east of Taihang mountains
Yu Shen'e, Zhao Junxiang, Yang Chengxian
Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China
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.
Key words:  The east of Taihang mountains  Genozoic faults  Dip-slip and dextral displacement  Uplift Fault activity