安徽霍山县东溪-南关岭金矿土壤化探的数学地质分析

文章运用数学地质方法对东溪—南关岭金矿及外围1:10000土壤化探数据进行分析,结果表明A u及相关指示元素异常主要受北西向构造破碎带控制。土壤地球化学元素R型聚类分析表明,12种微量元素可划分为:F1因子为Cu‐Pb‐Zn的中温元素组合,代表硫化物矿化因子;F2因子为Sb‐As‐W‐Mo组合,反映可能存在多期次叠加;F3因子为Bi‐Hg‐Sn组合,反映多期次叠加的特征;F4因子为Au‐Ag组合,反映成矿元素组合。对研究区1910个样品分别计算F4因子得分,F4因子得分>0的异常等值线图与A u异常等值线异常类似,与已知矿体吻合度高,认为F4因子得分异常区域及A u元素异常区域是重点找矿区域,具有较好的找矿前景。

Analysis of mathematical geology for soil geochemical exploration in the Dongxi-Nanguanling gold ore deposit,Huoshan, Anhui province

T his paper analyzed the data of soil geochemistry survey at the scale of 1∶10000 in the Dongxi‐Nanguanling gold ore deposit using the methods of mathematical geology .The results show that the Au anomalies and other related anomalies are mainly controlled by NW‐trending tectonic fracture zone . R‐cluster analysis of the soil geochemical data shows that twelve trace elements can be grouped into four categories .(1) F1 factor (including Cu ,Pb ,Zn and Au) is the combination of medium‐temperature ore -forming elements and represents the sulfide mineralization factor .(2) F2 factor (including Sb ,As ,W and Mo) may reflect character of multiple superimposed halos .(3) F3 factor including Bi ,Hg and Sn is the same as F2 factor .(4) F4 including Au and Ag reflects the combination of ore‐forming elements .The F4 factor score for 1910 samples from the study area was calculated .The contour map with the F4 factor score>0 is similar to that of the Au anomalies ,and this is highly coupled with the orebodies identified . Authors suggest that the anomalous areas and Au anomalous areas defined by F 4 factor scores are of good ore‐finding prospecting and should be the key exploration regions .