CAJ | 학술논문

在前人关于南堡凹陷新生代断裂系统形成机制构造物理模拟实验的基础上，针对南堡凹陷典型沉积时期断裂系统分布规律，进一步细化、分阶段开展了研究区不同沉积时期的构造在不同先存基底条件下的平面砂箱物理模拟实验，探讨了南堡凹陷新生代断裂系统形成的主控因素。研究结果表明：（1）南堡凹陷新生代构造具有分期异向伸展变形叠加的特征，是两期不同伸展方向构造变形叠加的产物；（2）NE-SW向断裂系统是在沙河街时期近NW-SE向伸展作用下形成的；近E-W向断裂系统是自东营期以来在近SN向伸展作用下形成的；东营早期是南堡凹陷应力体制发生转变的关键时期；（3）不同沉积时期的构造形态受控于特定的边界几何条件、基底非均匀性及先存断裂的展布特征。
재전인관우남보요함신생대단렬계통형성궤제구조물리모의실험적기출상，침대남보요함전형침적시기단렬계통분포규률，진일보세화、분계단개전료연구구불동침적시기적구조재불동선존기저조건하적평면사상물리모의실험，탐토료남보요함신생대단렬계통형성적주공인소。연구결과표명：（1）남보요함신생대구조구유분기이향신전변형첩가적특정，시량기불동신전방향구조변형첩가적산물；（2）NE-SW향단렬계통시재사하가시기근NW-SE향신전작용하형성적；근E-W향단렬계통시자동영기이래재근SN향신전작용하형성적；동영조기시남보요함응력체제발생전변적관건시기；（3）불동침적시기적구조형태수공우특정적변계궤하조건、기저비균균성급선존단렬적전포특정。
According to the comparison of the previous modeling results and the actual geological conditions in Nanpu sag,different series of physical models which are in different stretching directions and different pre-exist-ing basin structures have been conducted.Furthermore,the Cenozoic fault systems in Nanpu sag are discussed. The results can be concluded as follows:(1 )The Cenozoic fault systems in Nanpu sag are the result of two-phase extensions with different stretching directions. (2 )The NE-SW fault systems had undergone NW-SE extension during the Shahejie depositional period;while the EW fault systems had undergone SN extension since Dongying depositional period.The early Dongying period witnessed the changes of regional stress direction of Nanpu sag.(3 )The structural characteristics in different depositional periods were controlled by particular boundary geometry,basal heterogeneity,and distribution of pre-existing faults.