【摘要】 据重力场特征分析,将地质划分的金城关—砂金坪断裂,推断分解为金城关断裂与雁滩南—柳沟店隐伏断裂,这是两条平行斜列展布的断裂。其中以密集重力梯级带反映金城关断裂特征最明显,进而利用重力水平一阶导数、二阶导数和垂直一阶导数求解断层接触带总体产状。结合区域应力场特征及盆山耦合动力学模式,推断断裂在深部是北倾的逆断裂,与地震波速场反映断裂产状吻合。更多还原

【Abstract】 By studying the characteristics of gravity field, Jinchengguan-Shajinping fault which was named from geology is inferred into Jinchengguan fault and South Yantan Liudiangou hidden fault,two faults which parallel and spread diagonally.The intensive gravity stepped zone shows that the characteristics of Jinchengguan fault are obvious.The calculations of the first order and the second order derivations of gravity,and the first order derivation of vertical conclude that the overall strike of fault contact zone is steep,and it inferred that the fault is a north-dipped reverse fault in deep by combination of regional stress field and basin and mountain coupling dynamics model.This inference result meets the strike-dip of fault concluded by velocity field of seismic waves.更多还原