大地电磁(MT)法在深部矿产勘探中的分辨率探讨  

A Study of MT method on the Prospecting for Deep Ore Deposits

作　　者：夏时斌[1] 闵刚[1] 邱林[1] 张中[1] 

机构地区：[1]成都理工大学地球探测与信息技术教育部重点实验室,四川成都610059

出　　处：《工程地球物理学报》2012年第5期531-536,共6页Chinese Journal of Engineering Geophysics

基　　金：中国地质调查局项目(编号:1212011085169)资助

摘　　要：面对固体矿资源的日益枯竭,开展第二深度(>500m)找矿迫在眉睫,大地电磁(MT)法勘探深度大,受高阻屏蔽小,在深部找矿中具有重要的地位。本文以某矿区实际地电模型为例,利用成都理工大学开发的MTSoft2D软件对其进行正演模拟和occam反演计算,探讨大地电磁法对地电模型中异常体的分辨能力,为MT法在深部矿产勘探领域提供理论支持。olid mineral resources exhausted, the prospecting for the second deep ore deposits （〉 500m） is extremely urgent. Magnetotelluric method （MT） plays an important role in the prospecting for deep ore deposits because the depth of prospecting is big and the high resistivity shielding is low. In this paper, taking an actual geoelectric model of a mining ar- ea as an example, MTSoft2D software developed by Chengdu University is used to study the forward modeling and the Occam inversion calculation and explore whether the magne- totelluric method has the ability to distinguish the abnormal body in the geoelectric model, which has provided a theoretical support for the magnetotelluric method in the field of the prospection for deep ore deposits.

关 键 词：深部找矿 大地电磁法 地电模型 正演模拟 反演计算 

分 类 号：P631.3[天文地球—地质矿产勘探]