【摘要】 通过对青峰断裂房县段的构造地貌、地质特征、断错水系等第四纪活动地质地貌表现的分析认为,青峰断裂房县段在早第四纪有明显活动,晚第四纪有弱活动,活动时代为(5～7)×104年。断裂第四纪经历了至少两期不同性质的活动,第四纪早期为逆掩特征,晚第四纪表现为正倾滑兼左旋走滑性质。断裂第四纪左旋错动马栏河支流水系,错动位移量平均约1.7 km,断裂的左旋运动控制着房县盆地的发展及演化。更多还原

【Abstract】 On the basis of analysis of the tectonic landform and geologic features and TL dating,as well as drainage offset,we can draw some conclusions as follows.The Fangxian segment of Qingfeng fault was predominantly active in the Early Quaternary and weakly active in the Late one,and TL dating results range from 5×104 a to 7×104 a.The segment sufferred from two regime different tectonic movement,which is characterized by thrusting movement in the Early Quaternary and normal faulting and left-lateral slip movement in the Late Quaternary.Furthermore,the moving segment dislocated the branch drainage of the Malan river,with an average displacement of 1.7 km.The left-lateral movement dominates the development and evolution of Fangxian basin.更多还原