Chemical and stable isotopic geochemical characteristics of ore-forming fluid of the Shizishan copper and gold ore-field, Tongling, China
- 出版年：2007
- 作者：LU SanMing；XU XiaoChun；XIE QiaoQin；LOU JinWei；CHU Guoheng；XIONG YaPing
- 单位1：School of Resources and Environmental Engineering,Hefei University of Technology
- 语种：英文
- 作者关键词：Copper-gold deposit；Ore-forming fluid；Gas and liquid composition；Stable isotope；Shizishan ore-field；Tongling of Anhui
- 起始页：177
- 总页数：8
- 刊名：岩石学报
- 是否内版：否
- 刊频：月刊
- 创刊时间：1985
- 主办单位：中国矿物岩石地球化学学会；中国科学院地质与地球物理研究所
- 电子信箱：Ihzd@ public.tpt.tj.cn
- 卷：23
- 期：1
- 期刊索取号：P350.66357
摘要
Shizishan ore-field is a nonferrous and noble metal ore-field which is most rich in copper and gold. There are many typesoffluid inclusions in minerals of the deposits. The homogeneous temperatures and the salinities of the fluid inclusions m mammineralization stages have wide ranges, while the different types of the fluid inclusions existed together and their homogeneoustemperatures are almost identical in the same mineralization stage, which indicates that the ore-forming process has great relation withthe fluid boiling. The gas and liquid chemical compositions and the carbon, hydrogen and oxygen isotopic compositions of the fluidinclusions show that the ore-forming fluids of copper-gold deposits have the same characteristics and evolution tendency, which reflectsthat the ore-forming material mainly came from the magmatism. The stratigraphic component and the meteoric water may mix m ore-forming fluids in the later mineralization stages. Furthermore, with the fall of the ore-forming temperature the ratios of water and rockdecreased. The characteristics of chemical composition and carbon isotopic composition of fluid inclusions indicate that CH4 may playan important role for separating copper and gold in the ore-forming process.