张家口盆地及邻区重力场特征

Research on Characteristics of Gravity Field in Zhangjiakou Basin and Its Adjacent Area

以重力资料为基础,对张家口盆地及邻区的重力场及断裂构造特征进行系统分析研究.研究认为,区内重力异常特征与区域构造特征一致,局部凹陷区以低值异常为主,隆起区为高值异常,研究区内基底起伏较大;张家口盆地断裂构造方向性明显,北西-北西西向的断裂占主导地位.盆地内断裂构造的发育受北西西向张家口-渤海构造带和北北东向山西断陷带的复合作用控制.

Based on gravity data, the characteristics of gravity field and fault structure in Zhangjiakou basin and its adjacent area are systematically analyzed and studied. The research shows that the gravity anomaly is consistent with the regional structural characteristics, local de- pression area is a low value anomaly and the uplift area is a high value anomaly, and the basal fluctuation is large in the region. The direction of the fault structure in Zhangjiakou basin is ob- vious, and the fault with the direction of NW-NWW is in the dominant position. Development of fracture structure in the basin is under the compound action control of the Zhangjiakou-Bohai tectonic belt with the direction of NWW and Shanxi fault depression belt with the direction of NNE.