摘要
特高品位对钻孔数据的均值、方差等分析和矿床资源量估算均有较大影响,其识别和处理在地质勘查中是不可或缺的环节。本文介绍了常用的经验法、品位变化系数法、3σ法、估值邻域法、影响系数法和图表分析法,利用上述方法对白音查干矿床中Zn特高品位进行了识别和处理。根据上述方法的推荐值,并考虑到白音查干存在一期中温的热液成矿,后期又有浅成斑岩体的改造,特高品位的下限取26%。众多特高品位处理方法的差别对于资源量估算的影响在实际生产中均可以忽略,因此本文推荐最简单易行的方法,即在资源量估算中用下限代替特高品位。
Outliers of drill hole data can make the mean and variance inexact, and make the result of resource estimation higher, so identify and deal with outliers is an essential part of resource estimation. The paper presented several common methods, such as the empirical method, the coefficient of variation method, the 3σ method, the valuation of neighborhood method, the influence coefficient method and the chart analysis method,and these methods were used to identify and deal with zinc outliers in Baiyinchagan deposit. According to the recommended data of these methods, and considering the first phase of medium temperature hydrothermal mineralization in Baiyinchagan, and late hypabyssal porphyry body modification,the limit of outlier used 26%. There are many methods to deal with outliers, and the different results make no difference for resource estimation in actual production,so in the paper the easier method is recommended,that is having the limit displace the outliers.
出处
《中国矿山工程》
2014年第3期17-20,共4页
China Mine Engineering
关键词
资源量估算
特高品位
图表分析法
resource estimation
oullier
chart analysis method
