井地磁测资料联合反演及应用  

COOPERATIVE INVERSION AND APPLICATION OF SURFACE AND BOREHOLE MAGNETIC DATA

作　　者：刘双[1] 张大莲[1] 刘天佑[1] 杨坤彪[2] 范志雄[2] 

机构地区：[1]中国地质大学,武汉430074 [2]中国冶金地质总局中南地质勘查院,武汉430081

出　　处：《地质与勘探》2008年第6期69-72,共4页Geology and Exploration

基　　金：全国危机矿山接替资源找矿项目(编号:200799084);中国地质大学(武汉)“挑战杯”大学生课外学术科技作品竞赛项目资助

摘　　要：井中磁测离深部场源近,能避开浅部干扰,是一种有效的找矿手段,但其控制范围有限;地面磁测采集方便且控制范围大,但老矿区干扰因素多,深部矿体信号弱,不容易解释。文章充分利用地面和井中磁测资料的优点,以二度板状体模型为例,进行井地磁测资料联合反演。通过数值模拟说明了井地联合反演方法的优越性,同时还比较了马奎特法,广义逆法和遗传算法三种不同算法的优缺点,最后将其应用于大冶铁矿实际资料的处理解释,为危机矿山的深部找矿提供了一种有效的方法。Borehole magnetic measurement has the advantages, such as magnetometer is close to the magnetic sources and can avoid interference from shallow strata, which is an effective method for ore exploration. However, the control scope of borehole magnetic measurement is limited while the surface magnetic survey is convenient to make data acquisition and has larger recovery. Nevertheless, surface magnetic survey is confronted with problems, for instance much interference to geophysical detection in the old mining areas, weak interesting anomalies caused by ore body in depth which lead to difficulty to interpretation. In this paper, we.have made full use of surface and borehole magnetic data, creating a two dimensional sheet model, and carried out the cooperative inversion to simulate the ore body underground. The numerical calculation shows that the cooperative inversion of ground and borehole is superior. We also have compared the advantages and disadvantages of three inverse methods, such as Marquardt method, generalized inverse method and Ge- netic algorithm. Finally we applied this method in actual data processing and interpretation at Daye iron deposit and proved that it could be an effective way for ore prospecting in a deep exhausted mine.

关 键 词：井中三分量磁测 地面磁测 联合反演 马奎特法 广义逆法 遗传算法 大冶铁矿 

分 类 号：P631[天文地球—地质矿产勘探]