塔里木盆地顺北地区下古生界走滑断裂带断距分段差异与断层宽度关系

学者们对塔里木盆地顺北地区的下古生界走滑断裂带活动期次、发育时间、分段性和内部结构差异展开过一些研究,但尚未达成共识.厘清断距和断层宽度的分段差异.有助于对该地区走滑断裂展开更详细的研究.以200 m水平间距统计下古生界走滑断裂断距和断层宽度,采用线性拟合的方式落实断距与断层宽度之间的定量关系.结果表明:(1)顺北1号...

The Relationship between Fault Displacement and Damage Zone Width of the Paleozoic Strike-Slip Faults in Shunbei Area,Tarim Basin

The Lower Paleozoic No.1 and No.5 strike-slip faults in Shunbei area of Tarim Basin are hot spots for oil and gas exploration at present. It is of great significance to characterize the structure of strike-slip fault zone for exploration and development. The vertical fault spacing and fault width of the Lower Paleozoic were calculated with 200 m vertical interval, and the quantitative relationship between the vertical fault spacing and fault width was established. The results showed that: (1) T74 is the main interface and top-down development in middle Caledonian Ⅲ episode of SB1 strike-slip faults; The en-echelon normal faults are mainly developed in T70 with bottom to top development. T74 is the main interface pressure ridge segment development activities during the middle Caledonian Ⅲ episode in SB5 faults, bottom-up inheritance deformation to T63 interface; In the late Caledonian period, the whole pull-apart activity occurred, and from the T70 interface, the main fault surface was connected with the pressure ridge structure in the form of graben structure and inherited. (2)There is a positive correlation between the vertical fault distance (x) and the fault damage zone width (y) of the strike-slip faults in Shunbei area. Shunbei No.1 fault: y=42.206x+137.74, R2=0.740 4;Shunbei No.5 fault: y=0.072 6x2+15.85x+196.95, R2=0.774 9.