太行山石湖金矿成矿流体成分特征与演化过程

Metallogenic fluid composition and evolution process of the Shihu gold deposit,Taihang Tectonic belt

成矿流体的研究是矿床成因研究的一个非常重要的方面。本文通过石湖金矿流体包裹体的激光拉曼分析和包裹体群体分析,气相成分中发现了大量的含CO2包裹体,可能产生碳-水反应使其在主成矿期成矿;液相成分显示了成矿流体为以岩浆热液为主同时含有大气降水的混合流体,成矿过程主体为还原环境,后期也有O2的参与使环境转换为半封闭环境甚至是开放环境,而金在成矿流体中主要以硫氢络合物的形式迁移,氯络合物次之。

The study of the ore-forming fluid is a very important aspect for deposit metallogeny.This paper has done the experiments including laser Raman spectrometer and inclusion groups analyzing.A lot of CO2-bearing inclusions have been found in the gas phase compositions,which may leading to the mineralization because of Carbon-Water reactions.Liquid phase compositions show that the metallogenic fluids are magmatic fluids mingled with meteoric water.Furthermore,gold is formed remains in a reducing environment which may change to semi-enclosed and enclosed environment with O2 participation.Gold is carried as S-H complex in the metallogenic fluid when deposit is formed,secondly as Cl complex.