甲玛铜多金属矿三维变异函数计算系统研发及应用  

Development and application of three dimensional variogram computing system for Jiama copper-polymetallic deposit

作　　者：白林[1] 唐攀[2] 李楠[3] 

机构地区：[1]成都理工大学数学地质四川省重点实验室,成都610059 [2]成都理工大学地球科学学院,成都610059 [3]中国地质科学院矿产资源研究所,北京100037

出　　处：《物探化探计算技术》2016年第6期843-847,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：中国地质调查局项目(121201103000150003)

摘　　要：采用Matlab语言编写了三维变异函数计算系统,实现了西藏甲玛铜多金属矿实验变异函数计算和理论变异函数拟合等功能。设计按方位角、倾角、滞后距的不同组合计算实验变异函数,以供用户选择形态较好的实验变异函数图;实现了直接法、加权回归法和二级套合法3种不同的理论变异函数拟合方法;针对形态较差的实验变异函数图,提出模拟具有拟合经验的地质工作者的思维方式,设定理论变异函数曲线形态,反推块金、变程、基台值等参数。系统应用于西藏甲玛铜多金属矿矽卡岩矿体Cu元素变异函数模型计算,计算结果经交叉验证,具有较好的均值和标准方差。The three dimensional variogram computing system could achieve the experimental variogram computing and theoretical variogram fitting based on Matlab for Jiama copper-polymetallic deposit.System proposed computing experimental variograms by various azimuths,dips and lags for choosing the best figure of variograms.Fitting of theoretical variogram in this system included direct fitting,weighted regressing and nested-overlap.It emphasized simulating the thinking patterns of geologists who are experienced with fitting variogram to set the fitting curve for sick experimental variogram.Furthermore,it computed the theoretical variogram parameters such as nugget,range and sill.This system was applied to computing variograms of the Cu element of Jiama copper-polymetallic skarn deposit in Tibet.After cross-validation,it obtains better mean and standard deviation.

关 键 词：变异函数 地质统计学 MATLAB 

分 类 号：P628.2[天文地球—地质矿产勘探]