基于数学地球科学方法的滇西保山地块金厂河铅锌铜多金属矿床研究

Application of Mathematical Geoscience Method to the Study of Jinchanghe Pb-Zn-Cu Polymetallic Deposits in Baoshan Block of Western Yunnan

金厂河铅锌铜多金属矿床是西南三江成矿域保山多金属成矿带内近年来所发现的中大型多金属矿床.通过基于数学地球科学的地质数据分析方法,本文对矿区岩石地球化学数据进行了相关性分析、R型与Q型聚类分析、因子分析并且建立多元与逐步回归方程模型,从而对解释金厂河矿区成矿元素的富集规律及成矿作用提供了证据.研究表明,Pb、Zn、Cu、TFe、Ni、Mo、Ba、W等成矿元素在成矿过程中与其他元素呈现显著的相关性.聚类分析和因子分析结果表明,金厂河铅锌铜矿床成矿过程中具有以Pb-Zn、Cu、Fe为主要成矿元素的三个主要的矿化蚀变期次,并具有相应的矿化蚀变分带特征.通过建立金厂河铅锌铜矿区主成矿元素Pb、Cu的多元线性回归方程和逐步回归方程模型,得到包含Bi、Sb、Mo、Li等元素在内的成矿元素含量估算方程.实际工作中用回归估算值代替实测值在提高了工作效率的同时也对野外勘探具有一定的参考意义.

The Jinchanghe Pb-Zn-Cu polymetallic deposit is a medium-large polymetallic deposit discovered in recent years in the Baoshan polymetallic metallogenic belt of the Sanjiang metallogenic area in Southwest China.In this paper,by the geological data analysis method based on mathematical geoscience,we made correlation analysis,r-type and q-type clustering analysis,factor analysis and multiple linear and stepwise regression equation model for the geochemical data of rocks in the mining area to provide further evidence for studying the mineralization elements enrichment and mineralization in this area.The results show that the metallogenic elements such as Pb,Zn,Cu,TFe,Ni,Mo,Ba and W are significantly correlated with other elements in the metallogenic process.The results of cluster analysis and factor analysis show that there are three main mineralization alteration periods with Pb-Zn,Cu and Fe as the main ore-forming elements in the metallogenic process of Jinchanghe Pb-Zn-Cu deposit,and corresponding mineralization alteration zones.The content estimation equation of ore-forming elements including Bi,Sb,Mo and Li was obtained by establishing the multiple linear and stepwise regression equation model of the main ore-forming elements Pb and Cu in Jinchanghe Pb-Zn-Cu mining area.In practice,the regression estimation is used to replace the measured value,which not only improves the work efficiency,but also provides reference for field exploration.