CHARACTERISTICS OF THE CENOZOIC STRUCTURAL EVOLUTION IN THE NORTH OF THE DONGYING SAG, THE BOHAIWAN BASIN
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摘要: 根据平衡剖面原理、经过去压实校正编制了渤海湾盆地东营凹陷北部地区新生代构造演化剖面图以及沙一段沉积前和馆陶组沉积前的沙三段底面古构造图,并从演化剖面和平面古构造两方面入手进行研究,较系统地总结了该区新生代构造演化特征。综合分析得出,现今的沙三段底面构造轮廓在沙一段沉积前基本形成,研究区盖层滑脱断层较为发育。该结果对分析研究类似地区的构造演化过程具有较好的参考价值。Abstract: Based on the equilibrium section principle and by decompaction correction, the profiles of the Cenozoic structural evolution in the north of the Dongying Sag, the Bohaiwan Basin and the paleostructural maps of the subface of the Sha-3 Member before the sedimentation of the Sha-1 Member and the Guantao Formation were compiled. Starting with the evolution profiles and the plane paleostructures, the characteristics of the Cenozoic structural evolution in the study area were summarized systematically. The study showed that the present subface structural configuration of the Sha-3 Member was formed before the sedimentation of the Sha-1 Member, and decollement faults were developed in the caprocks of the study area. The results were of good reference values for the studying of structural evolution process of the similar areas.
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