摘要
湘西是金、砷、锑、汞等有色金属的重要成矿带。区域地层微量元素地球化学研究表明 ,湘西所出露的地层均显著富集砷 ,是砷的高区域地球化学异常区。元素存在相态的实验进一步表明 ,新元古界至寒武系中的砷以易迁移形式为主。母岩的这一性质决定了其风化土壤中砷的含量较高 ,土壤砷的高背景特征受人为采矿活动的影响 ,局部地区呈现高异常。土壤、水体砷的高异常已影响到居民的身体健康。
Western Hunan is a main ore forming zone for Au,As,Sb,Hg and other metal.The study on regional strata trace elements shows that the strata of Western Hunan are rich in arsenic,and Western Hunan is a high regional geochemical abnormal region for arsenic.The experimental geochemical study on arsenic speciations in the strata also indicates the speciations of arsenic in the Neoproterozoic—Cambrian strata are mainly movable fractions (exchangeable,bound to sulfides,bound to carbonates).The characteristics of rock in Western Hunan determinates that arsenic contents in soil weathering from the underlying rocks are possibly higher.While in mine region,arsenic contents of soil is higher than region value affected by human mining.The high abnormal arsenic contents in soil and water will do harm to the health of the inhabitants.
出处
《地质科技情报》
CAS
CSCD
北大核心
2000年第4期79-82,共4页
Geological Science and Technology Information
基金
中国博士后科学基金资助项目
中国科学院地理与资源研究所知识创新项目成果
关键词
表生环境
元素存在相态
生态健康效应
土壤
水体
surface earth environment
arsenic
speciation of element
ecological health effect
Western Hunan
