摘要
四道沟金矿床成矿物理化学参数:主要温度:90—270℃,分为110—220℃和230—270℃两个集中区:f_(S_2):10^(-14.06)—10^(-25);f_(O_2):10^(-39.4)—10^(-55.4);f_(H_2):10^(-0.54)—10^(-2.98);pH:4.5—5.2。金主要以Au(HS)_2形式搬运,它的离解是金沉淀的前题。
Sidaogou Gold Deposit consists of a system of quartz-filled altered rocks. With ore bodies developed mainly in Proterozoic clastic-sediment formation, its physicochemical mineralizing conditions have been investigated and determined as follows. Temperature range: from 90 to 270℃; the gaseous fugacites: fs2=10-14.06-10-25 , fo2 = 10-39.4-10-55.4 and fH2 = 10-0.54 -10-2.98 ; pH = 4.5-5.2. Mainly the gold is transported in the form of Au(HS)2-,with breaking dissociation as the prerequisite to its deposition.
关键词
金矿床
成矿条件
物理化学
络合物
gold deposit, mineralizing condition, physicochemical property, complex.
