广西贵港银山岭铅锌矿土壤地球化学找矿研究

通过在广西贵港银山岭开展1∶10 000地质简测工作和1∶10 000土壤剖面地球化学测量工作,总结了银山岭出露的地层、岩性、构造、围岩蚀变等地质特征,在此基础上,进行土壤地球化学找矿研究,得到以下认识:(1)微量元素参数统计表明,Pb、Zn、Ag元素含量相对较高,变化系数较大,易次生富集形成实质性的地球化学异常;(2)元素组合分析、元素分布型式、元素分形特征显示,Pb、Zn、Ag元素代表了主要成矿元素的次生富集组合,其分布范围广,离散度大,可作为找矿的主要指示元素;(3)综合地质和地球化学数据资料分析,在工作区发现了3个土壤地球化学异常块段,并对各个土壤地球化学异常进行解释评价,从而圈定找矿靶区,进一步提出了新的工作建议。

Study on Soil Geochemical Prospection of Lead-zinc Deposit in Yinshanling, Guigang, Guangxi

By promoting simple geological survey and geochemical measurement of soil profile in a scale of 1∶10,000 in Yinshanling,Guigang,Guangxi,we summarized the stratum,lithology,structure and wall-rock alteration exposed in Yinshanling.On above basis,we proceeded a research for soil geochemistry,and got the following understanding:(1) The statistical analysis of trace element parameters shows that the content of Pb,Zn,Ag element is relatively higher,the coefficient of variation is much bigger,and easily downward enrich to form substantial geochemical anomaly;(2) Combinatorial analysis of elements,element distribution patterns and element fractal characteristics show that the Pb,Zn,Ag represent secondary enrichment combination of the main ore-forming elements.And their distribution range is wide,dispersion is large so that they can be used as the main prospecting indicator elements;(3)Analysing integrating geological and geochemical data information,we discovered three geochemical anomaly segments in the work area,then interpreted and evaluated each soil geochemical anomaly,finally delimitated the prospecting target areas and put forward some new suggestions for work.