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跑马铅锌矿是我国川滇黔地区碳酸盐岩容矿的后生铅锌矿床(MVT),矿区萤石与铅锌矿紧密伴生,是主要的脉石矿物。通过对矿区两类不同类型萤石和矿石与围岩的稀土元素地球化学系统研究表明:跑马铅锌矿区成矿流体来源于封存在地层中的海水,属富卤素的氧化型盆地流体。单一的原始成矿流体持续演化在跑马铅锌矿区先后形成紫色萤石、无色萤石与金属硫化物,对应成矿流体从氧化环境向还原环境演变。原始的氧化型成矿流体通过加热富炭质地层(水/岩反应),诱发TSR作用,可能是促使金属硫化物沉淀和流体氧化还原态转变的一个重要因素。
Lead-Zinc Mine of Happy Horse is a post-secondary lead-zinc deposit (MVT) hosted by carbonate rocks in Sichuan, Yunnan and Guizhou provinces. Fluorite is closely associated with lead-zinc mine and is the main gangue mineral. The study of REE geochemistry of two different types of fluorite, ore and surrounding rock in the mining area shows that the ore-forming fluid in the lead-zinc ore bearing area of Happyma originates from the seawater sealed in the formation and is a halogen-rich oxidized basin fluid. A single original ore-forming fluid has evolved continuously. Purple fluorite, colorless fluorite and metal sulphide have been formed in the lead-zinc mine area at Happy Valley. Correspondingly, the evolution of ore-forming fluid from the oxidizing environment to the reducing environment. The original oxidized ore-forming fluid induced the TSR by heating the carbonaceous formation (water / rock reaction), which may be an important factor to promote the precipitation of metal sulfides and the redox state of the fluid.