单个硫化物矿物中铅硫同位素和微量元素原位微区分析及其在金属矿床研究中的应用

铅、硫同位素和微量元素是研究金属矿床重要手段之一，在成矿物质来源、物理化学条件、矿床成因、找矿勘探、环境地球化学等研究中得到了广泛的应用。本研究拟在国内首次开展利用飞秒激光剥蚀多接收及四极杆等离子体质谱实现薄片中单个硫化物矿物（如辉钼矿、黄铁矿、黄铜矿等）中铅、硫同位素和微量元素原位微区分析的方法，以获得同一薄片同一单矿物中相互配套的同位素和微量元素信息，提高分析效率，缩短研究周期。并以东秦岭金堆城斑岩钼矿床和北秦岭西部陕西铜峪VHMS型铜矿中的硫化物矿物为例评估该方法所获得的原位微区地球化学信息的优势，探索在成矿物质来源、物理化学条件和矿床成因研究中的应用。本研究将大大促进利用铅硫同位素和微量元素进行成矿研究的准确性和可靠性，在矿床成矿理论研究中具有重要的理论意义。

Lead and sulfur isotopes and trace element contents are widely applied in researches of metallic ore deposit in terms of sources of ore-forming materials, metallogenic physical chemical condition, genesis of the deposit, environmental geochemistry. This work intends to setup an new micro-in situ analytical method to obtain Pb, S isotopes and trace element concentrations of single sulfur mineral, such as molybdenite, pyrite, chalcopyrite etc.. Two target ore deposits are adopted in this work to investigate the validity of the method proposed in this work: Large Jinduicheng Porphyry Mo Deposit in the East Qinling and Tongyu VHMS copper deposit in the west part of the North Qinling. This proposal will enhance the accuracy and reliability of mineralization researches using Pb and S isotopes and promote metallogenic theory study.