西藏象背山铜多金属矿地质特征及找矿潜力分析

    Geological characteristics and prospecting potential analysis of Xiangbeishan copper polymetallic deposit in Tibet

    • 摘要: 西藏象背山铜多金属矿位于冈底斯斑岩-矽卡岩铜多金属成矿带东段,夹持于甲玛和驱龙两个超大型斑岩-矽卡岩矿床之间。象背山铜多金属矿为斑岩-矽卡岩矿床,是甲玛多中心复合斑岩成矿系统的一部分,其矿化类型主要为矽卡岩矿化和斑岩矿化,主成矿元素为铜、钼,伴生金、银;热液蚀变主要矽卡岩化、硅化、绢英岩化。其中,矽卡岩矿体主要赋存于斑岩和大理岩接触带以及角岩和大理岩接触带。成矿地质条件研究、地球化学勘查和高光谱蚀变提取成果指示,象背山铜多金属矿具有形成大型斑岩-矽卡岩铜钼(金、银)的潜力。

       

      Abstract: The Xiangbeishan copper polymetallic deposit in Tibet is located in the eastern section of Gangdese porphyry-skarn copper polymetallic mineralization, sandwiched between Jiama and Qulong super-large porphyry-skarn deposits. Xiangbeishan copper polymetallic deposit is a porphyry-skarn deposit, which is a part of Jiama polycentric complex porphyry metallogenic system. The hydrothermal alteration of Xiangbeishan copper polymetallic deposit is mainly skarnization, silicification and sericitization, and the mineralization types are mainly skarn mineralization and porphyry mineralization, and copper and molybdenum are the main ore-forming elements, associated with gold and silver. The skarn ore bodies mainly occur in the contact zone between porphyry and marble as well as between hornfels and marble. The results of metallogenic geological conditions, geochemical exploration and hyperspectral alteration extraction indicate that Xiangbeishan has the potential to form large porphyry-skarn Cu-Mo (Au, Ag).

       

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