安徽省东至县牛头高家金矿硫铅同位素示踪性浅析

Sulfur and lead isotopic tracer of Niutougaojia gold deposit in Dongzhi of Anhui

牛头高家金矿位于安徽省东至县地区,属扬子陆块北缘,其成矿围岩为红色粘土和奥陶系地层。本次研究对该矿区矿石矿物中的硫铅同位素进行系统分析,硫铅同位素组成显示了成矿物质的复杂性和多元性。结合地质背景和矿床地质特征分析,认为该矿床成矿物质主要来自岩浆热液,而奥陶系地层也提供了部分成矿物质。牛头高家金矿原生矿为浅成低温热液型矿床,后经历较为复杂的地质过程,最终形成独特的红土型金矿。

Niutougaojia gold deposit is located in Dongzhi County of Anhui Province,and it is at the northern margin of Yangtze block.The ore-forming wall rocks include red clay and Ordovician strata.This paper con-ducted systematic analysis on sulfur and lead isotope of the ores and minerals in the mining area,and the sul-fur and lead isotope composition showed the complexity and diversity of ore-forming materials.Combined with the analysis on the geological background and geological characteristics of the ore deposit,the author believed that the ore-forming materials were mainly sourced from magmatic hydrothermal fluid,and the Or-dovician strata also provided some ore-forming materials.The primary deposit of Niutougaojia gold deposit is a low-temperature epithermal deposit,and finally forms a unique red clay type gold deposit after a relatively complex geological process.