摘要
论述了本区各金矿床的成矿物理化学条件，并以此为基础，结合矿区的地质特征、流体成分和实验数据讨论了金在热液作用过程中的运移和沉淀条件。指出本区金主要以Ａｕ（ＨＳ）￣－＿２和ＡｕＣｌ￣－＿２的形式迁移，溶液的沸腾是引起流体Ｅｈ和ｐＨ变化，促使金沉淀的主要因素，但不排除早期的流─岩反应和晚期的吸附作用的影响存在。
Discussion on the metallogenic physicochemical conditions of Zhangjiakou-Chifeng goldmetallogenic province and on the migration and precipitation conditions of gold during hy-drothermal process based on the geological characteristics,fluid inclusion composition andexperiment data indicated that gold migrated mainly in the forms of Au(HS)and AuCl,and the precipitation of gold resulted from the changing of Eh and pH valuse,which princi-pally derived from fluid boiling under the influnce of the reaction between fluid and rocks inthe early stage and of the absorption in the late stage.
关键词
金矿床
矿化
物理化学
成矿过程
Physicochetnical condition Precipitation and migration of goldZhangjiakou-Chifeng gold deposit
