摘要
The authors made statistic calculation of stream sediment data using such means as traditional statistics, robust estimation, cumulative percentage of 85% and multifractal statistical method in Chabaqi area and compared the thresholds obtained by the four methods. The thresholds of the same elements obtained by the four methods are obviously different from each other. The thresholds calculated by the cumulative percentage statistics are lowest except for lead, and the thresholds calculated by the other three methods fail to show obvious regularity. The results are closely related to the distribution characteristics of the geochemical data and the statistical methods used.