粤东某锡多金属矿区地球化学特征及找矿前景

Geochemical characteristics and prospecting potential of a Sn-polymetallic deposit area in eastern Guangdong

矿区是粤东重要的锡多金属产区,在区内进行1:2.5万不规则网土壤地球化学测量,对Au、Ag、Cu、Pb、Zn、As、Sb、Hg、W、Sn、Mo、Bi、Co、Ni、Cr、Cd等16个元素含量进行测试分析,根据主要成矿元素、各元素异常空间套合关系以及矿区地质背景,圈定了甲类综合异常3处,分别为AP1砷钨铜异常、AP2锡铅铋砷异常、AP3钨钼砷异常。根据矿区成矿地质背景和地球化学特征,认为本区地层内部层间接触带及其与花岗岩体的接触带都是区内矿化蚀变有利部位,具有良好的锡、钨、铜多金属矿的资源前景。

The area in this study is an important Sn-polymetallic producing area in eastern Guangdong province.The geochemical soil survey of 1:25,000 irregular grid was carried out,and the contents of 16 elements(Au,Ag,Cu,Pb,Zn,As,Sb,Hg,W,Sn,Mo,Bi,Co,Ni,Cr and Cd)were tested and analyzed.According to the spatial relationship of each element anomaly and the geological background of the deposit area,three comprehensive geochemical anomalies are delineated,which are As-W-Cu anomaly(AP1),Sn-Pb-Bi-As anomaly(AP2),and W-Mo-As anomaly(AP3).According to the geological background and geochemical characteristics of the deposit area,the interlayer contact zone of the sedimentary strata and the contact zone between the strata with the granitoid intrusives are the favorable sites for mineralization and alteration.This area is considered to have a good resource prospect of tin,tungsten and copper ore deposit.