趋势面分析法圈定白溪地区化探异常及应用效果评价
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摘要
以白溪地区1∶1万土壤化探异常研究为例,采用趋势面分析,以不同次数的多项式拟合成矿元素的整体分布趋势;基于拟合度分析和F分布检验来确定最佳趋势面次数,在此基础上进行正剩余分析,识别出局部异常。在与传统方法对比分析后,认为剩余异常示矿明确,应用效果明显优于传统方法。
Exemplified by the 1∶10000 soil geochemical anomalies in Baixi area, Zhejiang, this paper used trend surface analysis, employed different degrees of polynomial to fit the overall distribution trend of metallogenic elements, based on the fitting analysis and F distribution test, determined the degree of polynomial of the best trend surface used to delineate geochemical anomalies, and then analyzed the residual, recognized local anomalies. Based on a comparison with the traditional average method, the authors holded that trend surface analysis is obviously superior to the traditional method, coincided well with the location of the deposit.
Exemplified by the 1∶10000 soil geochemical anomalies in Baixi area, Zhejiang, this paper used trend surface analysis, employed different degrees of polynomial to fit the overall distribution trend of metallogenic elements, based on the fitting analysis and F distribution test, determined the degree of polynomial of the best trend surface used to delineate geochemical anomalies, and then analyzed the residual, recognized local anomalies. Based on a comparison with the traditional average method, the authors holded that trend surface analysis is obviously superior to the traditional method, coincided well with the location of the deposit.
引文
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