大比例尺化探工作中异常评序的指标选择

The applications of anomaly ranking in Large scale geochemical exploration

本文分析了异常评序的常用指标、方法,应用实例对不同指标组合的评序结果进行了对比分析。对于1∶1万大比例尺化探异常评序提出:分区块采用纯地球化学指标对主成矿元素异常进行评续即可;地球化学指标的选用不是越多越好,采用四指标(面积、最大值、平均值、变异系数)方法简便、评序结果客观准确,可以有效甄别矿致异常。

This paper analyzes the index and method of the anomaly ranking , analysis the ranking results oI using dltterent indexs, this paper draw the following conclusions about anomaly ranking inl ： 10000 geochemical exploration ： It＇s only necessary to use pure geochemical index of main ore-forming elements in different blocks; index is not the more the better , using four indexs （area, maximum value, average value, variation coefficients）to make anomaly ranking is simple and efficient to operate. And its result is objective and true.And it can identify the mineral anomaly effectivelyo