【摘要】 根据冀南地区南宫凹陷构造发展演化历史特征,确定了南宫凹陷形成的动力学机制,即南宫凹陷是在裂陷动力学变形机制背景下形成的断陷盆地.特定的伸展构造背景决定了边界断裂滑脱深度的计算方法,由南宫凹陷边界断裂——明化镇断裂几何学和运动学特点,属典型的铲形正断层,结合I.Moretti关于铲形正断层控边盆地的滑脱深度和伸展量估算公式,估算出明化镇断裂的滑脱深度平均在8km以上,其数值与前人对华北地区深地震剖面所揭示的滑脱深度数据基本一致,从一个侧面反映了所取得数据的可靠性,这对该区油气勘探工作有一定的指导意义.更多还原

【Abstract】 The dynamics mechanism of Nangong depression is ensured based on its structure developing evolution. Nangong depression is formed during paleogene rifting period, it belongs to fault depression basin.Caculating method of detachment depth is different according to vary extensional structure setting. Based on the characteristics of geometry and kinematics of Minghuazhen fault —boundary fault of Nangong depression,Minghuazhen fault is a kind of listric normal fault. Using the estimation formula of spading normal fault about detachment depth and extensional value advanced by I.Moretti, the detachment depth of Minghuazhen fault, about 8km, is consistent to the value that got from the deep seismic profile on the Huabei area. The reliable depth value has certain extent conference significance to petroleum exploration.更多还原