中国石油大学学报（自然科学版）2017，Vol.41Issue(6)：41-49,9.DOI:10.3969/j.issn.1673-5005.2017.06.005
双帚状断层的成因和生长发育
Mechanism and growth of broom-like faults
摘要
Abstract
The formation and evolution of the double broom-like faults in Lin'nan sag of Bohai Bay Basin were studied by u-sing geometrical, kinematic and genetic analyses and analogue modeling. The results are as follows: Xiakou fault is a ten-sional-shear broom-like fault mainly formed by the extension and dextral strike slip faulting in the early Cretaceous, in which the fault plan converged at the eastern end and opened at the western end. The fault continued to develop in the Cenozoic by extension and dextral strike slipping to form a strike slip-normal fault. Linyi fault is a normal fault with a "broom-shaped"west end bunching and an eastern end opening, which was formed by the Cenozoic orthodox and oblique extension. The open-ing end and the converging ends of the fault are at the same fault level. The double-broom-like fault appeared in the Paleo-cene/Early Eocene, and the faulting activity intensifies from the convergent end to the opening end, resulting in a strong western end of Linyi fault and a strong eastern end of Xiakou fault. The intensity of fault activity of Linyi fault is greater than that of Xiakou fault in the Oligocene until the Pliocene. The strike-slip faulting of Langliao fault, the regional tectonic stress field since the Early Cretaceous, and the Cenozoic uplifting of Luxi uplift were the fundamental controlling factors of the for-mation and development of the double-broom fault.关键词
帚状构造/物理模拟/中—新生代/渤海湾盆地Key words
broom-like structure/analogue modeling/Meso-Cenozoic/Bohai Bay Basin分类
能源科技引用本文复制引用
李理,时秀朋,胡秋媛,陈衍..双帚状断层的成因和生长发育[J].中国石油大学学报（自然科学版）,2017,41(6):41-49,9.基金项目
国家自然科学基金项目(41672193) （41672193）
