| 安徽铜陵冬瓜山铜矿床成矿流体特征及演化 |
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| 引用本文：.2007.Characteristics and evolution of ore_forming fluids associated with Yanshanian magmatic activity in Dongguashan copper deposit, Anhui Province, China[J].Mineral Deposits,26(2):204~212 |
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| 基金项目:国家自然科学基金项目（编号：40573035）和国家自然科学基金重点项目（编号：40234051） |
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| 中文摘要:对安徽铜陵冬瓜山矿床内矽卡岩矿物、石英、方解石中的流体包裹体进行了岩相学和显微测温分析、群体包裹体气液相成分分析、单个包裹体气液相成分激光拉曼探针分析，探讨了成矿流体的特征及演化。研究表明，该矿床与燕山期岩浆热液有关的成矿流体，从早期矽卡岩阶段，经中期石英硫化物阶段，至晚期石英方解石阶段，是从高温、高盐度、富钾流体演化至中高温、中高盐度、富CO2（CH4）流体再至中低温、低盐度流体。成矿流体中的主要挥发分为H2O、CO2、CH4，并含少量C2H6、H2S、N2等，液相成分中的阳离子以Na+、K+为主，有少量Ca2+、Mg2+等，阴离子除Cl-外，SO2-4的含量也较高。 |
| 中文关键词:地球化学 流体包裹体 富钾流体 富CO2（CH4）流体 冬瓜山铜矿床 安徽 |
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| Characteristics and evolution of ore_forming fluids associated with Yanshanian magmatic activity in Dongguashan copper deposit, Anhui Province, China |
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| Abstract:Based on petrography, microthermometry and LRM analysis of fluid inclusions in garnet, diopside, quartz and calcite, this paper has discussed characteristics and evolution of ore_forming fluids in the Dongguashan copper deposit. The ore_forming fluids of Yanshanian magmatism evolved from high temperature, high salinity and K_rich fluids via moderate_high temperature and CO2(CH4) rich fluids to moderate_low temperature and low salinity fluids. The analytical results suggest that the dominant volatiles in the ore_forming fluids are H2O, CO2 and CH4, with minor C2H6，H2S, N2 etc. Na+, K+ as well as Ca2+, Mg2+ are dominant cations whereas Cl- and SO42- are major anions. High K and CO2(CH4) constitute the main feature of the ore_forming fluids related to Yanshanian magmatism. |
| keywords:geochemistry, fluid inclusion, potassic_rich fluid, CO2(CH4)-rich fluid, Dongguashan copper deposit Auhui Province |
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