山东省典型金矿区土壤重金属定量源解析及空间预测

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中图分类号：X753；X53 文献标志码：A 文章编号：1672-2043（2025）11-2922-13 doi：10.11654/jaes.2024-0910

Abstract：Inordertoinvestigatethesourcesofeavymetalsinsoilfgoldminigareasandtheirpatialdistributionpattes，tisork focusedonthegoldmine-intensiveareasofLizhouandZhaoyuaninSandongProvince toconductsystematicsamplingofthesufacesoil andchemicalanalysisofheavymetals.WithPositiveMatrixFactorization（P）andMaiumLikelioodPrncipalComponentAalyis Multivariate CurveResolution-Alternating LeastSquares（MLPCA-MCR-ALS），thesourcesofsoil heavymetalswerequantitively determined，andtheaveragesourcecontributionofthesetworeceptormodelswerecalculated.RndomForest（RF）modelwasusedto predictspatial paersofsoilheavymetals.As，Cr，NiandZnweremainlyfromnaturalsources，withtherespectiveaveragesource contributions of 64.29 % ， 72.31% ，79.86% and 48.41% ，controlled by parent material. Cd and Cu were controlled by agricultural sources， the respective average source contributions were 76.95 % and 60.48% .Simultaneously，agricultural sources also had 34.32% of contribution to Zn.Pb was controlled by traffic source，the average source contribution was 44.77% . The source of Hg was controlled by atmospheric deposition with the average source contribution of 80.18% ，which related to gold smelting and coal burning. The high value areasfAsweremailydistributedinteestepartoftestudyareahichwasconsistentwiththdisributionoflagonfcsdeposits andriveralluvium.TeighvaluesofCr，iandZweredistributedinteiddeandastoftestudyarea，whichasthesewithte distributionof granite parent material. Cd， Cu， Hg and Pb were mainly distributed inthe central part of the study area，whichwas located in anarea of intensive industrial and agricultural activities.

Keywords：heavy metals insoil; source apportionment; spatial distribution;influencing factor;gold mining area

矿产资源是经济社会发展的重要物质基础，在我国现代化建设中发挥着不可或缺的作用。（剩余26210字）