Sources and transportation of mining metals to soil:A case study from the Lala mining area,Southwest ChinaOA
Soil contamination with toxic metals from mining activities poses a risk to ecological security and human well-being,but research on their transport mechanisms is inadequate.Addressing this,this study combines the PCAAPCS-MLR model,hydrological and soil profile analyses,and geographic detector techniques within the Lala mining area,Sichuan Province,China,to explore the connection between soil metal enrichment and mining activities and to assess soil contamination.We identified three primary sources of metals in soils:geogenic background,mining activities,and industrial emissions.Mining activities are the primary source for Mn(13.6%),Cu(33.9%),Mo(69.1%),and As(40.0%)in soil,while industrial inputs contribute to Pb(63.8%),Zn(67.4%),and Cd(83.6%).Meanwhile,dry and wet deposition drove the dispersal mode of mine metals to the soil in the study area.Specifically,coarse mine wastes primarily settle around the mine sites,whereas fine particulates are carried northward by prevailing southwest winds,leading to northward and long-range transport.Our findings are important for assessing the mining industry''s footprint in arid environments.
Fang Yang;Lei Xu;Liang Tang;Li Dai;Xuemin Liu;Tim T.Werner;Lingfei Qu;Xuefeng Liao;Yang Li;Junbo Wang
Research Center for Planetary Science,Chengdu University of Technology,Chengdu 610059,China College of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,ChinaCollege of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,ChinaCollege of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,ChinaInstitute of Multipurpose Utilization of Mineral Resources,Chinese Academy of Geological Sciences,Chengdu 610041,ChinaCollege of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,ChinaSchool of Geography,Earth and Atmospheric Sciences,Faculty of Science,The University of Melbourne,Melbourne,AustraliaSichuan Development Environmental Science and Technology Research Institute Co.,Ltd.,Chengdu 610041,ChinaZhongke Yirong Ecological Environment Co.,Ltd.,Chengdu 610095,ChinaSichuan Development Environmental Science and Technology Research Institute Co.,Ltd.,Chengdu 610041,ChinaSchool of Environment,Tsinghua University,Beijing 100084,China
资源环境
Heavy metalsLala mining areaArable soilPCA-APCS-MLR modelMine waste diffusion
《Acta Geochimica》 2026 (2)
P.298-313,16
supported by Geological Environment Investigation of the Concentrated Mine Sites of Polymetallic Mineral Resources in Panxi Region,Sichuan Province(Nos.DD20160337,DD20242280)。
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