老矿山深部、边部找矿中磁法工作的体会  

Understanding from magnetic method in old mine's depth and edge prospection

作　　者：吴晓峰[1] 杨悸熒[1] 

机构地区：[1]江苏省有色金属华东地质勘查局,江苏南京210007

出　　处：《矿产与地质》2013年第3期251-255,共5页Mineral Resources and Geology

摘　　要：老矿山深部、边部找矿潜力巨大。在老矿区深边部进行与磁性矿物有关的铁铅锌铜等有色金属、贵金属矿勘查时,高精度磁测、航磁、磁测井、三维定量反演、井地联合反演是常规、经济和有效的磁法工作方法。找矿时,利用磁测资料对已有矿体进行正演,求取剩余磁异常,再精细反演深边部矿体的产状、埋深。同时,要特别关注老矿山次级、低缓的磁异常。为了提高磁异常解释的准确度,要与地质相结合进行推断解释。Resources potential in old mine’s depth and edge prospection is enormous.During the prospecting of nonferrous and precious metal minerals,such as Fe,Pb,Zn,Cu which are related to magnetic mineral in old mine’s depth and edge,the normal,economical and effective methods are high-precision magnetic survey,aeromagnetic survey,magnetic logging,3D quantitative inversion and joint inversion of surface and borehole.During the prospecting,forward is used on existed ore bodies according to magnetic data to find out residual magnetic abnormality,and then inversion is applied to determine occurrence and depth of ore bodies in old mine’s depth and edge.Meanwhile,secondary,low and subdued magnetic abnormality of old mine shall be paid attention to.In order to raise the accuracy of magnetic abnormality interpretation,magnetic interpretation shall be deduced and explained in light of geology.

关 键 词：剩余磁异常 磁法 老矿山 井地联合反演 

分 类 号：P631.2[天文地球—地质矿产勘探]