安徽月山矿成矿流体中铜,金的迁移形式和沉淀的物理化学条件

文章基于矿床地质特征和地球化学热力学理论，计算和讨论了安微月山矽卡岩－热液型铜，金矿田成矿流体中成矿物质的迁移形式和沉淀的物理化学条件，两类矿床的主要成矿阶段，成矿流体中铜主要以氯络合物ＣｕＣｌ、ＣｕＣｌ２＾－、ＣｕＣｌ＾２－３，ＣｕＣｌＯＨ，金主要以硫的络合物Ａｕ２（ＨＳ）２Ｓ＾２－，Ａｕ（ＨＳ）２＾－，ＡｕＨＳ、ＡｕＨ３ＳｉＯ４等形式进行迁移，成矿流体中铜沉淀的主要物化条件是降温及氯离子浓度的

Migrating forms and depositional physicochemical conditions of copper, gold in hydrothermal solutions of Yueshan orefield, Anhui province.

Based on geological characteristics of the copper, gold deposits in Yueshan skarn hydrothermal orefield Anhui province, complexes of transportation species of the ore forming materials and their depositional physicochemical conditions have been calculated and discussed according to thermodynamic theories. At the major copper, gold metallogenic stages of the two types of deposits in Yueshan, major copper complexes species in the fluid ore forming system were CuCl, CuCl 2 -, CuCl 3 2- and CuClOH, and major gold complexes species were Au 2(HS) 2S 2- , Au(HS) 2 -, AuHS and AuH 3SiO 4. Principal physicochemical conditions for copper deposition in the fluid were declining of temperature and concentration of chlorine ion caused by fluid cooling, boiling and mixing, and these for gold deposition were decreasing of pH values, total sulfur concentration and oxygen fugacity resulted from fluid boiling and mixing.