安徽省休宁-歙县地区水系沉积物地球化学特征及找矿远景

Geochemical Characteristics of Stream Sediments and Prospectivity of the Xiuning-Shexian Area, Anhui Province

在1:5万水系沉积物测量的基础上,对安徽省休宁-歙县地区的地球化学特征进行了初步研究。通过元素地球化学特征、R型聚类分析和因子分析,认为Au、Ag、Pb、W、Bi等为研究区主要成矿元素。通过总结元素组合特征和异常空间分布规律,认识到异常围绕燕山期岩浆岩分布,具有明显的高中低温分带特征,推断解译认为本地区多金属矿化与燕山期岩浆热液成矿作用有关。在此基础上,结合地质、矿产分布特征,圈定了5处成矿远景区。结果表明通过应用水系沉积物地球化学勘查方法,可以有效的优选找矿目标,明确找矿方向。

Geochemical characteristics of the Xiuning-Shexian area,Anhui Province is conducted in terms of 1:50000 stream sediments survey.Geochemical characteristics,R cluster and factor analyses suggest that Au,Ag,Pb,W and Bi are dominant metallogenic elements in the Xiuning-Shexian area.Zoning from high-temperature to low-temperature are distributed around Yanshanian magmatic rocks,which display typical elemental association and spatial anomalies.Such zoning suggest that the ploymetal mineralization is closely related to magmatic hydrothermal derived from Yanshanian plutons.According to geological features and mineral resources distribution,five polymetal prospective areas could be ad- dressed.The results indicate stream sediment geochemical survey can be highly efficient for ore prospecting.