航磁Theta图在秦岭中部某铜矿岩体边界识别中的应用  

Application of Aeromagnetic Theta Map in Boundary Identification of a Copper Mine in Central Qinling

作　　者：郑伟 许石 孙海龙 范玉海 Zheng Wei;Xu Shi;Sun Hailong;Fan Yuhai(Xi'an Coal Aviation Remote Sensing Information Co.,Ltd.,Xi'an 710199,China)

机构地区：[1]西安煤航遥感信息有限公司,陕西西安710199

出　　处：《科学技术创新》2022年第15期10-13,共4页Scientific and Technological Innovation

摘　　要：Theta图法利用解析信号振幅对总水平导数进行归一化,其极大值与磁场边界相对应,该方法具有能识别不同深度的磁性地质体、分辨率高等特点,逐渐得到了学者的认可且应用广泛。本文利用Theta图法对秦岭中部某区化极延拓不同高度的磁异常做处理,对比发现延拓100m后应用效果较好;结合区域地质资料圈定了6处岩体、3条断裂;通过Theta-Depth法可估算磁性地质体的深度,为研究区找矿提供了依据。Theta map method normalizes the total horizontal derivative by using the amplitude of analytical signal,and its maximum corresponds to the magnetic field boundary.This method has the characteristics of identifying magnetic geological bodies with different depths and high resolution.It has been gradually recognized by scholars and widely used.In this paper,theta map method is used to deal with the magnetic anomalies at different heights in the extension of a geochemical pole in the middle of Qinling Mountains.It is found that the application effect is better after 100m extension;Combined with regional geological data,6 rock masses and 3 faults are delineated;The depth of magnetic geological body can be estimated by theta depth method,which provides a basis for ore prospecting in the study area.

关 键 词：Theta图 向上延拓 航磁 断裂 

分 类 号：P631.2[天文地球—地质矿产勘探]