摘要
河台金矿在韧性剪切成矿阶段,围岩的组成发生了显著的变化,成矿溶液富含K^+,Na^+,ΣFe,HCO_3^-以及Au^(3+)等;在岩浆期后热液叠加成矿阶段,成矿温度为200～300℃,成矿压力为1033Pa,氧逸度为10^(-40)～10^(-37)Pa,硫逸度力10^(-20)～10^(-10)Pa,二氧化碳逸度为10^(0.41)～10^(1.99)Pa,pH值为4.53～5.60,Eh值为-0.1395～-0.1005V。含金石英脉与含金韧性剪切带县有相似的同位素组成和包裹体特征。
During the metallogenesis of the ductile shearing, the composition of the host rock is changed and the ore-forming solution is rich in K^+, Na^+,∑Fe, HCO_3^-, Au^(3+) etc.. During the metallogenesis of superimposition by thepostmagmatic hydrothermal solution, the temperature is 200℃ to 300℃,the pressure is 1033 Pa, f_(O_2)=10^(-40) to 10^(-37)Pa, f_(S_2)=10^(-20) to 10^(-10)Pa, f_(CO_2)=10^(0.41) to 10^(1.99) Pa, pH=4.53 to 5.60, Eh=-0.1395 to -0.1005V. TheAu-bearing quartz vein is similar to the Au-bearing ductile shear zone inits isotope and inclusion characteristics.
关键词
金矿
地球化学
成矿作用
广东
gold deposit
geochemistry
metallogenesis
Guangdong
Hetai
