盆地热卤水系统关键金属元素Cd-Tl共存成矿机制：以金顶Zn-Pb-Cd-Tl矿床为例

盆地热卤水系统中镉－铊矿化的赋存状态和成因耦合关系是目前矿床学的研究热点问题之一，而矿床尺度的镉－铊矿化共存研究较少，不仅影响热卤水成矿理论的完善，而且关系国际矿产勘查的方向。金顶是世界上唯一报道富含镉－铊共存一体的Zn－Pb矿床，镉－铊达超大型规模，可作为镉和铊矿化的研究典例。项目以镉－铊非传统稳定同位素研究为重点，结合单矿物微量元素和流体包裹体等研究，解析镉－铊赋存状态，查明成矿流体演化和镉－铊共存成矿环境，揭示盆地热卤水系统中镉－铊共存成矿机制，探索镉－铊共存之因。项目预期成果不但可以为其他热卤水共存镉和铊矿化提供研究范例，为完善盆地热卤水的成矿理论提供关键依据，从而提高热卤水成矿系统的研究水平，而且可指导金顶矿床找矿勘查工作，拓宽盆地热卤水系统中镉－铊矿化的找矿思路。

The occurance and genetic relationship between the coexisting Cd-Tl mineralization in the basinal brine system is a hot research issue of the mineral deposit geology. However, researches on the coexisting Cd-Tl mineralization in sediment-hosted rocks are few as deposit scale. Thus, it not only helps to improve the ore-forming theory of the basinal brine system, but also constraints the international mineral exploration direction. The Jinding wold-class Pb-Zn-Cd-Tl deposit is regarded as a research paradigm for the coexisting Cd-Tl mineralization in the Lanping Basin. We take the Cd-Tl nontraditional isotopes as key point and integrate the studies on ore-forming fluid inclusion and In-situ analysis of single mineral, and confirm the source of ore-forming fluid and metal source, with ore-forming environment. Finally, we will reveal ore-forming processes and mechanism in the basinal brine system, and discuss the reason of the coexisting Cd-Tl mineralization. The expected achievement can offer a research paradigm for the other coexisting Cd-Tl mineralization, and provides a key basis to improve and perfect the basinal brine metallogenic theory, then improves the research level of ore system of the basinal brine. Besides, this study also can guide the next exploration work in Jinding ore district, further expand the prospecting thought in ore system of the basinal brine.