因子分析在冀东峪耳崖金矿地球化学找矿中的应用

峪耳崖金矿位于华北板块北缘，矿区基底地层为太古界迁西群麻粒岩相和角闪岩相，矿体受NNE—NE向断裂构造控制，赋矿围岩为花岗岩。在矿床地质特征基础上，利用矿区土壤地球化学数据，采取传统统计法和累计频率法圈定了金矿12个元素的异常范围；运用因子分析方法划分出了Sb Hg Pb As元素组合、Au Ag Bi元素组合、Zn Cu Sn元素组合和W Mo元素组合；再对因子得分进行趋势面分析，较为有效地突出了深层次的找矿信息，更准确地圈出成矿靶区。结合研究区地质特征认为Au Ag Bi元素组合和Sb Hg Pb As元素组合为研究区最佳地球化学标志元素组合，下一步地质工作重点应放在矿区中矿带矿体深部及其南部异常高值区，同时布置少量工程在北矿带，以追索与唐杖子金矿之间的联系。

Application of Factor Analysis in Geochemical Prospecting of the Yu'erya Gold Mine in Eastern Hebei

The Yu'erya gold deposit is located at the northern margin of the North China Plate.The basement of the mining area is the granulite facies and amphibolite facies of the Qianxi Group in the Archean strata.The ore body is controlled by the NNE NE fault structure and the ore bearing surrounding rock is granite.Based on the geological characteristics of the deposit,using the soil geochemical data of the mining area,the traditional statistical method and cumulative frequency method were used to delineate the anomalous range of 12 elements in the gold deposit.The factor analysis method was used to distinguish the Sb Hg Pb As element combination and Au Ag Bi.Element combination,Zn Cu Sn element combination and W Mo element combination; further trend analysis of factor scores,which effectively highlights deep prospecting information and more accurately circle the ore forming target area.Combined with the geological characteristics of the study area,the combination of Au Ag Bi element and Sb Hg Pb As element is the best geochemical marker element combination in the study area.The next step of geological work should be placed in the deep part of the ore body in the mining area and the abnormally high value in the south.At the same time,a small number of projects were arranged in the northern ore belt to trace the relationship between the mine and the Tangzhangzi Gold Mine.