长江全流域的重金属异常是我国面临的重大环境问题。系统研究重金属异常源追踪与定量评估方法、查明污染源，任务十分紧迫。攀枝花地区具备独特的自然、人工交互环境，是对这一科学问题进行深入研究的理想场所。研究具典型意义。本项目拟从微量重金属环境地球化学研究入手，查明典型矿区大气重金属时空变异规律，确定其自然背景输入；采用高精度同位素测试技术，对比研究大气颗粒物及端元物质的同位素组成特征；应用同位素地球化学方法原理，通过Cd-V非传统同位素示踪体系的联用，研究重金属异常的形成原因、物质来源、释放通量及迁移规律，揭示大型矿业活动区大气重金属自然源和人为源的叠加情况，精细刻画其在地表端元储存库中的自然循环规律。研究成果具有普遍适用性，可定量区分及评价人为活动释放污染物对大气环境质量的相对贡献和影响，为有效辨识环境污染源提供新的示踪手段，并有望进一步拓展同位素体系的应用领域。

Heavy metals anomaly in the Yangtze River basin is a very serious ecological environmental problem in China. It’s a pressing task to chase and evaluate the pollution sources. Panzhihua is an ideal place to carry out this research with a special environment of natural and anthropogenic combination. So the research has a novelty. The project will start with the study of environmental geochemical behavior of heavy metals, to reveal their spatial variation and verify natural input of atmospheric heavy metals in the mining area. By the method of isotope geochemistry, high accuracy isotopic determination technology will be applied to compare isotopic ratios between atmospheric particles and end members. Using the multiple method of Cd-V non-traditional stable isotopic tracing, we aim to study the forming mechanism of heavy metals anomaly, sources, distribution, fluxes and transport, to reveal the overlying of natural and anthropogenic heavy metals under the background of large-scale mining activities, and then to describe cadmium cycling in atmosphere. The results will be useful to distinguish and evaluate quantitatively anthropogenic heavy metals inputs to atmosphere, and provide a new tracing method for pollution sources. More importantly, the results will extend the application of isotopic system.