大冶铜绿山铜铁矿床尾矿砂中重金属与微量元素环境地球化学特征研究  

Environmental geochemistry of heavy metal and trace elements in tailings of Tonglüshan Copper and Iron Mine, Daye, Hubei Province

作　　者：黄康俊[1] 谢淑云[1] 鲍征宇[1,2,3] 董志成[1] 喻超[1] 

机构地区：[1]中国地质大学地球科学学院 [2]中国地质大学地质过程与矿产资源国家重点实验室,湖北武汉430074 [3]中国地质大学生物地质与环境地质教育部重点实验室,湖北武汉430074

出　　处：《地球化学》2008年第3期213-222,共10页Geochimica

基　　金：国家自然科学基金(40502029)

摘　　要：为了解铜绿山铜铁矿床尾矿砂中重金属元素的释放迁移地球化学过程及其扩散范围,运用ICP-MS对大冶铜绿山铜铁矿床尾砂库的尾矿砂及其相关的水系沉积物和土壤中重金属元素、稀土元素进行了测试分析。环境地球化学研究发现,研究区重金属元素在尾矿砂垂向剖面和水系沉积物中具有较明显的垂向和横向空间分布规律;尾砂库西北边水稻田土壤明显受到Cu、Zn、Cd等重金属元素的污染,稀土元素分布模式及微量元素比值研究揭示了污染原因可能是水稻田土壤继承了附近废弃的选矿厂和矿体的特征;尾矿砂和水系沉积物稀土元素分布模式及微量元素比值的变化规律,在一定程度上可以解释重金属元素在垂向和横向空间上的分布特征。To investigate the release and transport of heavy metal elements in the tailings of the Tonglushan Copper and Iron Mine, seven heavy metal and rare earth elements in the tailings, nearby stream sediments and soils were analyzed by ICP-MS. The results of show that the spatial distribution patterns of metal dements change gradually at both vertical and horizontal profiles in the tailings and stream sediments, and the heavy metal elements of interest correlate with each other to a certain degree. The paddy soil on the northwest edge of the tailings reservoir has been polluted obviously by Cu, Zn and Cd, which is mainly due to the succession of the paddy soil to the characteristics of the abandoned concentration plant and nearby ore bodies as revealed by REE patterns and trace element ratios. REE patterns and trace element ratios might be, to some extent, useful to explain the vertical and horizontal spatial distribution patterns of heavy metal elements.

关 键 词：尾矿砂 环境地球化学 重金属元素 稀土元素 湖北省 

分 类 号：P595[天文地球—地球化学]