【摘要】 以松辽盆地宾县—王府凹陷为对象,采用构造-地层分析方法,通过选取多条地震剖面进行二维构造-地层解译和平衡恢复研究,并计算伸展量和伸展率,揭示出宾县—王府凹陷的发育过程,并分析盆地总体结构特征和盆地形成机制。结果显示,火石岭组、沙河子组和营城子组属于初始裂陷期沉积;登娄库组沉积前的断陷盆地相受断层控制,登娄库组沉积期向塘坊镇隆起上的超覆明显,盆内一些正断层对盆地沉降具有一定控制。登娄库组之后盆地已完全进入坳陷沉降期,表现为区域性整体沉降,沉降中心与早期断陷没有明显的对应关系,凹陷沉降已经不受早期断陷控制;泉头组,特别是泉头组三段和青山口组沉积时期盆地主要表现为坳陷沉降;凹陷整体结构清楚地表现为下断上超的特点;凹陷的形成与近南北向右旋转换伸展作用有关。更多还原

【Abstract】 By means of two dimensional structure-stratigraphy interpretation of several seismic profiles,cross-section balancing,and calculation of extension amount and extension rates,the paper investigated developing process of the Binxian-Wangfu sag and analyzed the structural features and forming mechanism of the basin.The results show that Binxian-Wangfu sag was in the initial stage of rifting in the Huoshiling Formation,Shahezi Formation and Yingchengzi Formation,and the fault depression was mainly controlled by normal faults before the deposition of the Denglouku Formation.The sag onlaps to the Tangfangzhen uplift,and was also controlled to some extent by normal faulting within the basin during the deposition.The sag completely turned into depression and exhibited regional subsidence after the deposition of the Denglouku Formation,and the subsidence center was not obviously corresponding to the early fault depression,and the subsidence of the Binxian-Wangfu sag was not controlled by the early fault depression.During the Quantou Formation period,especially the third segment and the Qingshankou Formation period the sag mainly showed depressional subsidence;The general structure of the basin was clearly marked by faults in the lower section and onlap in the upper section.The basin formation was associated with the the NS-trending dextral transtension.更多还原