A Lognormal Distribution of Metal Resources
Donald A.Singer
摘要：For national or global resource estimation of frequencies of metals,a lognormal distribution has commonly been recornmended but not adequately tested.Tests of frequencies of Cu,Zn,Pb,Ag,and Au contents of 1984 well-explored mineral deposits display a poor fit to the lognormal distribution.When the same metals plus Mo,Co,Nb2O3,and REE2O3 are grouped into 19 geologically defined deposit types,only eight of the 73 tests fail to be fit by lognormal distribution,and most of those failures are in two deposit types suggesting a problem with those types.Estimates of the mean and standard deviation of each of the metals in each of the deposit types are pmvided for modeling.
机标关键词：lognormal distributionstandard deviationmineral depositsfailuresdisplaydefinedplustwo
分类号：P5(地质学)
论文发表日期：2011-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
英文信息