克里金法和动态搜索椭球体在某斑岩型铜矿估值中的应用  

Application of dynamic search ellipsoid and kriging in porphyry copper deposit modeling

作　　者：李慎斌[1] 樊勇[1] LI Shenbin;FAN Yong(China ENFI Engineering Corporation,Beijing 100038,China)

机构地区：[1]中国恩菲工程技术有限公司,北京100038

出　　处：《中国矿业》2018年第B10期36-39,共4页China Mining Magazine

摘　　要：普通克里金法估值是将传统方法和统计学方法高度结合的品位估值方法,是目前国际上进行品位估值工作的通用方法。搜索椭球体的设置直接影响参与品位估值样品的空间分布和数量,是影响估值结果准确性的最重要因素。本文以某斑岩型铜矿为例,重点论述动态搜索椭球体和普通克里金法在品位估值中的应用,并概述整个品位估值过程中相关参数的选择原则。矿化体的产状一般随矿化方向的变化而变化,在品位估值过程中,矿化体产状和矿化方向不同的部位应单独计算变异函数,搜索椭球体也要与矿化方向一致,才能保证估值结果真实反映矿化情况。Kriging method is a method of grade estimation that combines traditional methods with statistical methods.It is a common method for grade estimation at the international level.The setting of the search ellipsoid directly affects the spatial distribution and quantity of the sample that participate grade estimation,which is the most important factor affecting the accuracy of the estimation results.Taking a porphyry copper deposit as an example,this paper focuses on the application of dynamic search ellipsoid and Kriging method in grade estimation,and outlines the selection principle of relevant parameters in the whole grade estimation process.The occurrence of deposit generally varies with the direction of mineralization.In the process of grade estimation,the variograms should be calculated separately for different parts of mineralization.The search ellipsoid should also be consistent with the mineralization direction to ensure the estimation results can truly reflect the mineralization character.

关 键 词：斑岩型铜矿 变异函数 搜索椭球体 建模 克里金法 

分 类 号：P618.41[天文地球—矿床学]