江西德兴铜矿大坞河土壤重金属累积特征与成因

江西德兴铜矿是中国超大型斑岩铜矿，随着矿业活动的增加，德兴铜矿区重金属污染问题日益严重。查明德兴铜矿土壤重金属累积作用及原因，可为政府机构、矿山开展环境整冶提供科学依据。在大坞河上游、中游、下游选定3个剖面，采集50件土壤样品，得出其基于地球化学基线的累积特征。整体来讲，Cu、Mo累积作用最为显著，Cr、As累积作用明显，同时发现一级、二级阶地上累积显著，并从矿石组合、地化背景、河流阶地、元素形态、矿山生产等角度开展累积作用的原因分析。

A genetic analysis of soil heavy metals accumulation characteristics of the Dawu River basin in the Dexing copper mine, Jiangxi Province

The Dexing copper mine is a superlarge porphyry copper deposit in Jiangxi Province. With the increasing mining activities, the environmental problem of heavy metals pollution have become more and more serious in the Dexing copper ore district. In order to improve the quality of the soil environment of the Dawu River in the Dexing copper ore district, the accumulation effect of heavy metal elements and the reasons should be understood. The authors selected three sections in upstream, midstream and downstream areas of the Dawu River, collected 50 samples, calculated the accumulation rate of heavy metal elements based on geochemical baseline and, on such a basis, revealed the accumulation characteristics. Generally speaking, the accumulation of Cu and Mo is important and clear, and the cumulative effect of Cr and As is obvious on the first- and second-order terraces of Dawu river basin, where the accumulation effect of heavy metals is remarkable. The authors also analyzed the factors responsible for the accumulation of heavy metals in the aspects of mineral association, geological setting, river terraces, topography, elemental speciation and mining process.