A Comparison of Several Threshold Determination Methods in Geochemical Data Processing: A Case Study of Stream Sediments in Chabaqi Area of
详细信息
- 责任者：Dai Huimin (Shenyang Institute of Geology and Mineral Resources ; Shenyang 110034 ; China) ; Gong Chuandong
- 刊名：Geophysical and Geochemical Exploration
- 出版年：2010
- 卷期：34(6)
- 关键词：水系沉积物测量 ; stream sediment surveys ; 地球化学异常下限 ; geochemical threshold ; 内蒙古 ; Inner Mongolia
- 页码：p.782-786
- 图表：1 illus., 1 table, 4 refs.
- 分类号：1500
- issnNo：ISSN1000-8918
- isbnNo：CN11-1906/P
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.
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