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辽宁省金矿周边表层土壤重金属超标特征与矿床成因之间的关系
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Abstract:
辽宁省金矿床周边表层土壤重金属超标主要是由金矿开采造成的，且与矿床成因类型密切相关。韧性剪切带型金矿周边表层土壤中超标重金属组合(各元素报出率)为：Cr (100%) + Cu (100%) + Ni (82%) + Cd (65%) + Pb (17%)；变质–岩浆热液叠生型金矿的为：Cd (100%) + As (100%) + Pb (100%) + Zn (100%) + Cu (100%) + Cr (79%) + Ni (29%) + Hg (21%)；陆相火山岩型金矿的为：Cd (90%) + Cu (90%) + Pb (70%) + As (40%) + Zn (40%) + Hg (10%) + Ni (10%) + Cr (10%)；岩浆热液型的为：Cu (100%) + Cd (100%) + Pb (100%) + Cr (100%) + Ni (100%) + Hg (75%) + As (75%)。超标重金属元素组合与矿床成因特征对应良好。
Excess heavy metals in surface soil around gold deposits in Liaoning Province are mainly caused by gold mining, and are closely related to the genetic types of deposits. In the surface soil around ductile shear zone type gold deposit, the combination of excessive heavy metal elements (the re-ported rate of each element) is: Cr (100%) + Cu (100%) + Ni (82%) + Cd (65%) + Pb (17%). The gold deposits of metamorphic and magmatic hydrothermal superposition type are Cd (100%) + As (100%) + Pb (100%) + Zn (100%) + Cu (100%) + Cr (79%) + Ni (29%) + Hg (21%). The continental volcanic rock type gold deposits are Cd (90%) + Cu (90%) + Pb (70%) + As (40%) + Zn (40%) + Hg (10%) + Ni (10%) + Cr (10%). The magmatic hydrothermal gold deposits are Cu (100%) + Cd (100%) + Pb (100%) + Cr (100%) + Ni (100%) + Hg (75%) + As (75%). The association of excessive heavy metal elements corresponds well to the genetic characteristics of deposits.
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