苏北盆地真武吴堡断裂带的构造样式及圈闭类型

Structural Style and Trap Type of Zhenwu-Wubao Fault Zone in Subei Basin

苏北盆地真武吴堡断裂带的构造样式主要有主控断层呈左阶式排列、末端呈发散状、左阶式交错部位褶皱隆起、主控断层两侧发育羽状断层,这些构造样式是该断裂带在反转拉张沉降的同时又具有右行扭动而形成。依据地层构造形态、断层特点及其组合关系,可将该断裂带的圈闭类型归纳为4类,分别是屋脊式断鼻圈闭、顺向断层断鼻圈闭、地垒式断块圈闭和阶梯式断块圈闭。

The structural type of Zhenwu-Wubao fault zone in Subei Basin includes sinistral step arrangement of major fault, its end is divergent, fold upward occurs in the sinistral cross location, pinnate fault is grown at both ends of the major fault. These structural styles are formed because of the inverse extension and deposition and right side torsion of the structural zone. According to the structural style of the stratum, characters of the fault and its combination correlations, the trap types of the fault zone can be classified into 4 types, such as trap of roof-like fault nose, forward fault-fault nose trap, horst block trap and stepped fault block trap.