沙溪斑岩铜矿三维建模及铜品位空间变异研究  

Research on Ore body Three-dimensional Modeling and Spatial Variation of Copper Grade in Shaxi Porphyry Deposit

作　　者：袁峰[1] 陈庆[1] 李晓晖[1] 张明明[1] 贾蔡[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《皖西学院学报》2014年第2期107-110,共4页Journal of West Anhui University

基　　金：国家"深部探测技术与实验研究专项计划"专题(SinoProbe-03-02-05);中国地质调查局地质调查工作项目(1212011121115);新世纪优秀人才支持计划项目(NCET-10-0324)资助

摘　　要：本文针对沙溪斑岩铜矿床,首先构建了主矿体的三维实体模型,之后以此作为约束对主矿体内部的铜品位数值开展空间变异研究分析。运用地质统计学方法,分别对主矿体走向、倾斜和厚度方向上的实验变异函数进行了理论模型拟合。拟合结果显示,铜品位在矿体走向方向上具有最好的连续性,较高的块金常数则显示出铜品位在较小范围内有很大的随机性,进而建议矿山提高矿区的勘探密度,进一步对矿体及品位的分布进行控制。In view of Shaxi porphyry deposit,three-dimensional solid models of major ore bodies are established firstly,then using these models as a constraint to study spatial variation based on copper grade numerical of samples in major ore bodies.Using geostatistics method,experimental variograms in strike direction,tilt direction and thickness direction of major ore bodies are respectively nested by theoretical models.The results show correlation of copper grade is better in strike direction.High nugget constant indicate that the grade distribution within a smaller range is very random,it recommends encrypting exploration density to control the distribution of ore body and grade.

关 键 词：三维模型 空间变异 地质统计学 沙溪铜矿 安徽省 

分 类 号：P618.41[天文地球—矿床学]