磁法θ图方法在圈定磁性体边界中的应用

近几年提出的导数处理方法θ图法利用极大值圈定磁性体边界,其算法主要步骤为计算垂向一阶导数与总水平导数的比值。通过分析二维半情况下不同磁性体模型的θ图,总结了θ图极值与直立磁性体边界、倾斜磁性体边界、岩体及矽卡岩带边界的对应性规律。该方法对重力圈定断裂构造及地质界线也有借鉴意义。

Application of Magnetic θ Map Method in the Delineation of Magnetic Body Boundary

In recent years, one derivative processing method is Thete Map method. By using maximum to delineate magnetic geological boundaries. The main steps of its algorithm are to calculate the ratio of vertical first derivative and total horizontal derivative. By analyzing the thete maps in different magnetic models, correspondence law of thete map and the boundaries of upright magnetic bodies, tilt magnetic bodies, rock and skarn have been summarized. This method have references to delineate fault structure and geological boundary by using gravity method.