摘要
磁化强度矢量反演方法在磁法勘探中具有现实意义,能够获取磁场强度大小和磁化方向。磁化强度矢量反演方法通常是基于笛卡尔直角坐标系进行计算,在野外和实验室测得的岩石磁性数据都是以磁化强度和磁化方向的形式给出,将其变换到笛卡尔直角坐标系中进行计算,显然增加了计算的冗余性。这里首先通过模型实验证明球坐标系下的磁化强度矢量反演方法具有两个优点:①减少了未知数的个数,因而可以减少计算时间;②反演结果更加聚焦,深度分辨率更高。然后将球坐标系下的磁化强度矢量反演方法应用于卡拉塔格红海-黄土坡勘查区,对该区的实测航磁数据进行处理,计算得到了勘查区的磁化率模型,为深部找矿提供地球物理借鉴。
Magnetization vector inversion method is an effective algorithm in magnetic prospecting,which can give the magnitude and direction of magnetic field intensity.This method is usually based on Cartesian coordinates.However,both field and laboratory magnetic data of rocks are given in the form of magnetization intensity,magnetic declination and magnetic inclination.It is obvious that the computation redundancy can be increased by transforming it into Cartesian coordinates system.Solving the norm solution in spherical coordinate system with the constraints of magnetic anomaly modulus,magnetic declination angle and magnetic inclination will obtain a more focused solution than solving the three components of magnetic anomaly in Cartesian coordinates system.In this paper,the inversion method of magnetization vector in spherical coordinate system is applied to the measured aeromagnetic data of the HongHai-HuangTuPo exploration area in Kalatage.The magnetic susceptibility model of the exploration area has been calculated to provide geophysical evidence for deep prospecting.
作者
杨力
周可法
王金林
YANG Li;ZHOU Kefa;WANG Jinlin(Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011,China;University of Chinese Academy of Sciences, Beijing 100049,China)
出处
《物探化探计算技术》
CAS
2020年第2期260-266,共7页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家自然科学基金(U1503291,41602339)
中国科学院战略性先导科技专项(A类)(XDA19030204)。
