双帚状断层的成因和生长发育

发布时间：2018-06-12 15:13

本文选题：帚状构造 + 物理模拟　；参考：《中国石油大学学报(自然科学版)》2017年06期

【摘要】：通过几何学、运动学和成因分析及物理模拟试验,对渤海湾盆地临南洼陷双帚状断层的成因及演化进行研究。结果表明:夏口断层为东端收敛、西端撒开的张剪帚状断层,早白垩世受伸展与右行走滑作用产生,新生代受伸展叠加走滑作用继续发育成为一条走滑—正断层,临邑"帚状断层"西敛东撒,为新生代正向以及斜向伸展叠加走滑的产物,其撒开端与收敛端级别相同而非次级断层;双帚状断层出现在古新世—早始新世,活动强度由收敛端向撒开端迁移,即夏口断层由西向东迁移,临邑断层由东向西变强,并在渐新世后超过了夏口断层直到上新世;早白垩世以来区域构造应力场的变化、兰聊断层的走滑作用及鲁西隆起新生代的抬升是控制双帚状断层形成和发育的根本因素。
[Abstract]:Based on geometry, kinematics and genetic analysis and physical simulation tests, the origin and evolution of double broomlike faults in Linnan sag in Bohai Bay Basin are studied. The results show that the Xiakou fault converges at the eastern end and spreads out at the western end of the fault. The early Cretaceous is caused by extension and right strike-slip, and the Cenozoic extended superimposed strike-slip continues to develop into a strike-slip normal fault. Linyi's "broom fault" distributes from the west to the east, which is the product of the Cenozoic positive and oblique extension superimposed strike-slip, and its spreading start is the same as that of the convergent end rather than the secondary fault, and the double-broom fault appears in the Paleocene to early Eocene. The activity intensity began to migrate from convergence end to dispersal, that is, Xiakou fault migrated from west to east, Linyi fault became strong from east to west, and surpassed Xiakou fault until Pliocene after Oligocene, and the change of regional tectonic stress field since early Cretaceous, The strike slip of Lanliao fault and the Cenozoic uplift of the western Shandong uplift are the basic factors controlling the formation and development of double broom faults.
【作者单位】：中国石油大学地球科学与技术学院;海洋国家实验室海洋矿产资源评价与探测技术功能实验室;中国石化胜利油田分公司勘探开发研究院西部分院;中国石油大学胜利学院;
【基金】：国家自然科学基金项目(41672193)
【分类号】：P618.13

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