【摘要】 在系统观察岩心的基础上并结合测井、地震等资料对济阳坳陷侏罗系岩相古地理演化特征及其控制作用进行了研究。结果表明,侏罗纪济阳坳陷为一受北西向断层控制而相互分割的山间盆地,早、中侏罗世以冲积平原和滨浅湖沉积为主,晚侏罗世以冲积平原沉积为主。对应于早-中侏罗世早期—早-中侏罗世中期—早-中侏罗世晚期—晚侏罗世早期—晚侏罗世晚期,北西向断层的活动依次表现为较强—弱—消失—极微弱—较强5个不同的阶段。相应的沉积表现为:在北西向断层的东北侧,扇三角洲-滨浅湖沉积体系逐渐演化为冲积扇-河流-三角洲沉积体系;在北西向断层的南西侧,冲积扇-河流-三角洲沉积体系不断向盆地中进积;滨浅湖发育范围逐渐变小,沉积中心逐渐向北西向断层的南西侧迁移。更多还原

【Abstract】 According to core observation,a lot of well logging and seismic data,the evolution of lithofacies-paleogeography and its controlling factors of Jurassic in Jiyang depression were comprehensively studied.The results show that being primarily controlled by north-west faults,Jiyang depression contained several isolated basins druing Jurassic period.Coastal and shallow lake subfacies and alluvial plain sub-facies were dominant in early-middle Jurassic,and alluvial plain sub-facies were dominant in late Jurassic.During the early period of early-middle Jurassic,the middle period of early-middle Jurassic,the late period of early-middle Jurassic,the early period of late Jurassic,and the late period of late Jurassic,north-west faults were correspondingly in a more intense,weak,dormant,very weak,and more intense stage,and correspondingly depositional systems evolved from fan delta-coastal and shallow lake to alluvial fan-river-delta on east-north side of north-west faults,and alluvial fan-river-delta depositional systems extended toward the basins on west-south side of north-west faults.As a result,the area of coastal and shallow lake became smaller,and sedimentary centers moved toward the west-south sides of north-west faults.更多还原