摘要
从不同标高、不同矿化带的流体包裹体研究入手,系统地论述了七宝山铜多金属矿床成矿流体的性质、演化过程及其与成矿的关系。黄铁矿爆裂测温表明:成矿流体温度变化在平面上以岩体为中心向四周依次为291℃~287℃~279℃,在剖面上由下往上依次为312℃~286℃~228℃。成矿流体成分主要为H2O,其次为CO2,H+浓度由早期到后期呈递减趋势,表明成矿热液由酸性—弱碱性演化,同时反映了矿床由高温到中低温的形成过程。
Based on measures of fluid inclusion in different levels and mineralized belt, the characteristics and evolution process of ore-forming fluids in the Qibaoshan Cu-polymetal deposit are discussed systematically. Decrepitation thermomer of pyrite shows temperature of the ore-forming fluids dropped slowly from 291 ℃ to 279 ℃ around the rock body in horizontal, and varied from 312 ℃ to 228 ℃ from the lower level upward in profile. The main composition of the fluids was H2O and CO2, the concentrations of H^+ decrease during evolution of the ore-forming fluids, showing tendency of the fluids from acidity to alkalescence and process of ore-forming.
出处
《地球科学与环境学报》
CAS
2004年第2期11-15,共5页
Journal of Earth Sciences and Environment
基金
国家自然科学基金项目(49772152)
关键词
铜多金属矿床
流体包裹体
盐度
矿化度
湖南
ore-forming fluid
fluid inclusion
salinity
degree of mineralization
Qibaoshan
Hunan Liuyang