冀东平原元素地球化学分布模式及其在区域环境资源评价中的应用

Patterns of the Distributions of Geochemistry Elements in the Eastern Hubei Plain and the Application in the Evaluation of Region Environment and Resources

运用因子分析将冀东平原多目标土壤地球化学调查的54项指标凝缩为5个指标来研究区域元素地球化学分布模式及其成因。5个指标即为5个因子:F1因子主要由Fe、Al、Si等造岩元素,Ti、V、Cr、Mn、Co、Ni、Sc等铁族微量元素及Th、Ce、La等稀土元素组成,代表成壤过程中形成的自然元素组合;F2因子由Cl、S、Br、I、Na、Ca、Mg元素组成,为与海相沉积环境有关的元素组合;F3因子由碱土元素Sr、Ba及碱金属元素Na组成,主要反映了唐山市铁矿的地质背景环境;F4因子由C、有机碳(Corg)、Se组成,属成煤因子;F5因子由K和Rb组成,反映区内一中生代花岗岩体。研究结果表明,所选的5个指标客观、清晰地反映了研究区元素地球化学分布景观全貌,不同的地质地球化学背景单元是控制元素空间分异的主要因素。该研究所揭示的元素地球化学分布模式及其成因对区域环境与资源评价具有重要的指导作用。

In order to research the patterns and origins of the distributions of geochemistry elements in multi-purpose geochemistry investigating in the eastern Hubei plain,the article consolidated more than fifty geochemistry indexes to five by factor analysis.The five indexes are namely the five factors：F1to F5.F1mainly consists of lithosphere elements Fe,Al,Si,et al;siderophile elements Ti,V,Cr,Mn,Co,Ni,Sc, et al;rare earth elements Th,Ce,La,et al,which represents natural element association.F2is made up of Cl,S,Br,I,Na,Ca,Mg,meaning maritime precipitation environment.F3is composed of alkaline earth Sr, Ba and alkali metals Na,reflecting geologic surroundings of iron ore in Tangshan City.F4is made up of total carbon,organic carbon and selenium,meaning a coal-forming factor.F5is composed of K and Rb, illustrating a Mesozoic granitic rock.The result indicates that these indexes describe naturally and distinctly the outlines of the distributions of geochemistry elements in the region.It is the different geologic geo-chemistry portions that have controlled the dispersing of element distributions.The patterns and origins of the distributions of geochemistry elements should be the guideline for the evaluation of the region environ-ment and resources.