地面高精度磁测在西藏恰功铁矿勘查中的应用效果  

The Application of High-accuracy Ground Magnetic Survey in Qiagong Iron Deposits, in Tibet

作　　者：李志华[1,2] 王威 李群生 王建锋 卢显成 张国辉 

机构地区：[1]中国地质大学资源学院,武汉430074 [2]内蒙古自治区矿产实验研究所,呼和浩特010031

出　　处：《西部资源》2014年第5期85-89,共5页Western Resources

摘　　要：恰功铁矿是近几年新发现的矿山,然而矿体的形态、大小、埋深、位置、产状、边界等几何特征还没有被认识清楚。为了弄清这些问题,本文通过欧拉反褶积方法对磁异常化极数据进行了反演,反演矿体深度为0-120m;在C-6异常中心选择了两条剖面进行了2.5维拟合反演,反演矿体厚度为20~30m,欧拉反褶积反演结果和2.5维拟合反演结果与ZK32钻孔验证结果相吻合。最后,通过建立恰功矽卡岩型铁矿地质—地球物理找矿模型,为该地区寻找隐伏夕卡岩型铁矿提供了思路。Qiagong iron deposits is a new discovered iron deposits in the recent years, the geometric characterization of shape ,size,positions,buried depth,occurrence and boundary of ore body have not a systematic recognition until now. In order to resolve these problems, this paper based on the inversion result of Euler deconvolution method and 2.5 D fitting inverse of two profiles, the inversion depths 0 to 120 meters is consistent to the drilling resuhs. Last, based on the magnetic anomaly characteristic analysis, establishing a comprehensive geological--geophysical prospecting model of Qiagong iron deposits, it can play a important role in searching for deep-buried iron deposits in this area.

关 键 词：地面高精度磁法测量 欧拉反褶积方法 二度半磁性体反演 恰功铁矿 

分 类 号：P618.31[天文地球—矿床学] P631.2[天文地球—地质学]