【摘要】 金顶矿床是世界上形成时代最新且唯一的陆相沉积岩容矿的超大型铅锌矿床,受人关注。金顶矿石中矿物的交生关系表明内生流体成矿经历了石英-闪锌矿-方铅矿、闪锌矿-方铅矿-天青石、方铅矿-方解石-天青石-石膏三个矿化阶段,黄铁矿在各矿化阶段中均有形成,不同世代矿物从产状、结构、组合关系等得以区分;矿物流体包裹体中包括REE在内的几十种微量元素的配分曲线和含量分布不因寄主矿物种类而明显变化,不同矿化阶段矿物流体包裹体微量元素组成是大规模成矿流体过程的重要约束;大规模成矿从第1到第3矿化阶段,内生成矿流体∑REE逐步升高(1．34×10^-9～6．28×10^-9～297．03×10^-9),轻重REE分异越趋显著,系统从还原性演化为氧化性,微量元素组合趋于复杂,流体中成矿元素(Zn 13．594×10^-9～29331．810×10^-9)不断富集(Zn依次是中国陆壳的0．16×10^-3～0．20×10^-3倍、0．041～0．193倍、0．028～0．341倍);早—中阶段的流体成矿可能是快速的,中—晚阶段趋缓;深、浅部两种不同性质流体混合可能是流体大规模成矿的基本过程。更多还原

【Abstract】 The Jinding ore deposit is the youngest and the only giant deposit hosted in continental sedimentary rocks in the world,and followed with interests.The Jinding fluid mineralization experienced three stages,they are quartz-sphalerite-galena,sphalerite-galena- celestite and galena-calcite-celestite-gypsum,according to the intergrowth of minerals in the Jinding ores.Pyrite occurs in each stage, and various generations of minerals can be distinguished by their occurrence,texture and assemblage relations.Rare element compositions in fluid inclusions are an important indicator of the large-scale fluid metallogenic processes because the REE patterns and rare element distributions of the fluid inclusions in minerals of various mineralization stages do not evidently change in different hosted minerals.From the first to the third mineralization stage of the fluid mineralization processes,∑REE(1.34×10^-9～6.28×10^-9～297.03×10^-9)and LREE/HREE increased in the ore-forming fluid respectively,and the fluid system became more oxidizing,the rare element assemblage of the ore-forming fluid became more complex,the metallogenic element(zinc changing from 13.594×10^-9 to 29331.810×10^-9)was richer and richer(zinc being 0.16×10^-3～0.20×10^-3 times,0.041～0.193 times and 0.028～0.341 times of China continental crust) in the ore-forming fluid.The fluid mineralization may be quick during the early-middle stage and slower during the middle-late stage. A mixing of a deep- and a shallow- fluid may be the essentials for the large-scale mineralization in the Jinding.更多还原