胶东金翅岭金矿成矿流体特征及地质意义

来源期刊:中国有色金属学报2012年第3期

论文作者:杨柳 邹海洋 杨牧 柯朝晖

文章页码:726 - 732

关键词:成矿流体;包裹体;金矿床;金翅岭

Key words:ore-forming fluid; fluid inclusion; gold deposit; Jinchiling

摘    要:为了解胶东金翅岭金矿成矿流体特征,开展流体包裹体研究。结果表明:矿石石英中主要发育H2O-CO2包裹体、富CO2包裹体和H2O溶液包裹体3种类型,成矿流体均一温度、盐度及密度分别为120~362 ℃,3.2%~9.0%,0.34~0.94 g/m3,为中低温、低盐度及低密度流体;包裹体液相成分阳离子以K+、Na+、Ca2+和Mg2+为主,阴离子以SO42-、Cl-和F-为主;气相成分以H2O、CO2和CH4为主。结合矿区前人研究,认为该成矿流体是多源流体混合并经历水岩反应演变而成。

Abstract:

To clarify the characteristics of ore-forming fluid of the Jinchiling gold deposit, fluid inclusion study was carried out. The results show that the inclusions consist of three types: H2O-CO2, CO2 and H2O inclusions. The compositions of cation and anion ions in liquid and gas of the inclusions are mainly respectively Na+, K+, Ca2+, Mg2+; SO42-, Cl-, F-; H2O, CO2 and CH4. The homogenization temperature, salinity and density of the fluid inclusions for the mineralization change from 120 ℃ to 362 ℃, 3.2% to 9.0% and 0.34 g/m3 to 0.94 g/m3, respectively, which show that these inclusions belong to middle-low temperature, low salinity and low density fluid. Combined with analyses of other researches, it is found that the ore-forming fluid following water-rock reaction is the mixture of multi-source fluid during its evolution.

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