重庆城口地区下寒武统黑色岩系重金属富集特征及其生态环境效应  

The Concentrations of Heavy Metals in the Lower Cambrian Black Rock Series in Chengkou District,Chongqing and Their Environmental Effects

作　　者：程军[1,2] 程礼军[1] 

机构地区：[1]外生成矿与矿山环境重庆市重点实验室,重庆地质矿产研究院,重庆400042 [2]煤炭资源与安全开采国家重点实验室重庆研究中心,重庆400042

出　　处：《地球与环境》2012年第1期93-99,共7页Earth and Environment

基　　金：重庆市国土资源和房屋管理局科研项目(CIGMR0905);环境地球化学国家重点实验室开放基金项目(HDH09001)

摘　　要：重庆城口地区广泛发育有下寒武统黑色岩系。测定了城口地区下寒武统黑色岩系中多金属富集层、黑色岩系岩石及其风化土壤、硅质岩样品中Cr、Co、Ni、Cu、Zn、As、Cd、Sb、Pb含量。结果表明多金属富集层中重金属相对比较富集,其中Cd、Zn、As的富集程度较高,富集系数平均分别为119.67,10.73,7.30。运用地质累积指数法和生态危害指数法评价了重金属的潜在生态环境效应,其中Cd、As的生态危害较大,黑色岩系尤其以多金属富集最为明显,在未来的研究中关注多金属富集层中Cd、As的生态环境效应。The Lower Cambrian black rock series is well developed in the Chengkou district,Chongqing.The concentrations of Cr,Co,Ni,Cu,Zn,As,Cd,Sb and Pb in polymetallic layer,black rock series and responding weathering soil,and silicates were measured.The results showed that in the polymetallic layer,the heavy metals are enriched,especially Cd,Zn and As,and the enrichment coefficients are 119.67,10.73 and 7.30,respectively.The geo-accumulation index and ecological risk index methods have been used to assess the potential environmental effects.The ecological risk of Cd,As in the polymetallic layer is serious,and attention should be paid to this in future study.

关 键 词：城口 黑色岩系 重金属 环境效应 镉 

分 类 号：P595[天文地球—地球化学] X141[天文地球—地质学]