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松湖铁矿位于新疆阿吾拉勒成矿带中段,其成矿作用经历了2期6个阶段:硫化物-钾长石阶段、赤铁矿-方解石-绿泥石阶段、磁铁矿-绿泥石-钾长石阶段(称为早阶段铁矿化)、磁铁矿-硫化物阶段(称为晚阶段铁矿化)、方解石-黄铜矿阶段及表生期.为了分析其成分特征及其成因,使用磁铁矿电子探针分析,结果显示:早阶段磁铁矿FeOT含量高,TiO2、Al2O3、MgO、MnO等含量均较低,与接触交代矿床成分特征相似,加之SiO2含量较高,暗示其形成与酸性岩浆热液密切相关;晚阶段为主成矿阶段,广泛作用于早阶段矿石之上,磁铁矿FeOT含量相对较低,TiO2、MnO、V2O3、MgO、Al2O3等含量高于早阶段磁铁矿,显示为热液成因.综合矿床地质特征,认为晚阶段磁铁矿形成于岩浆活动晚期或间歇期,含矿热液中有海水的加入.
The Songhu Lake iron deposit is located in the middle of the Ulalale metallogenic belt in Xinjiang, and its metallogenesis has undergone two stages of six stages: sulfide-potassium feldspar, hematite-calcite-chlorite stage, magnetite-green The mudstone-potash feldspar stage (called early stage iron mineralization), the magnetite-sulfide stage (called late stage iron mineralization), the calcite-chalcopyrite stage and the epigenetic stage.In order to analyze the compositional characteristics The results show that the contents of FeOT, TiO2, Al2O3, MgO and MnO are lower in the earlier stage than those in the contact metasomatism, and the content of SiO2 is higher High, indicating that its formation is closely related to the acidic magmatic hydrothermal. The late stage is the main metallogenic stage and acts extensively on the early stage ore. The content of FeOT in the magnetite is relatively low and the contents of TiO2, MnO, V2O3, MgO and Al2O3 Which is higher than the magnetite in the early stage and shows the hydrothermal origin.According to the geological characteristics of the deposit, it is considered that the late stage magnetite is formed in the late or intermittent magmatic activity and the seawater is added into the ore-bearing hydrothermal fluid.