基于三维地质建模的点元法重力正演——以某大型铁矿为例  

The application of vertical cube gravity forward modeling on three-dimensional geological modeling: A case study of an iron deposit

作　　者：周旋 金瑜 许春梅 

机构地区：[1]新疆远山矿产资源勘查有限公司,新疆乌鲁木齐830011

出　　处：《物探与化探》2015年第3期490-495,共6页Geophysical and Geochemical Exploration

摘　　要：三维地质建模是目前西方地质学和矿业界通行的一种地质研究和储量计算方法,它运用地质统计学原理,引入区域化变量概念,对矿体三维模型合理划分块段,并进行品位估值和储量计算。以吉尔吉斯斯坦某大型铁矿为研究对象,利用矿山矿石品位与密度之间的相关函数,将品位估值的矿体三维模型转换为密度三维模型(密度点元),最后通过点元法重力正演计算,并将正演结果与矿区实测重力数据进行对比分析,提出铁矿矿山重力勘探的新思路,为矿山增储及勘探工作部署提出依据。Three?dimensional geological modeling is a common method for geological research and calculation of reserves in geology and mining industry in Western Countries, which utilizes geostatistics and the concept of regionalized variable to reasonably divide the blocks of the three?dimensional orebody model and then to estimate the grade and calculate the reserves. In this paper, with a large iron deposit in Kyrgyzstan as the research object, the authors used the correlation function between the grade and density of the ore, then translated the three?dimensional model of ore's grade valuation into ore's density (density of vertical cube). At last, by the vertical cube gravity forward calculation, a comparative analysis of the forward modeling result and measured gravity data is made. On such a basis, the authors put forward a new method for iron gravity exploration and provide a basis for increasing reserves and deploying explo?ration work.

关 键 词：点元法重力正演 三维地质模型 品位估值 密度品位相关性 

分 类 号：P628.3[天文地球—地质矿产勘探] P618.31[天文地球—地质学]