摘要
从中国南方12个省自治区230万km2面积上所采集的水系沉积物中按每1∶5万图幅一个组合样的密度组合成5 244件组合样,采用以ICP-MS、ICP-AES和XRF为主的先进的分析测试方法和严格的质量控制方法,准确测试了其中的76种元素。统计计算了中国南方地区76种元素的平均值,给出了中国南方地区水系沉积物中76种元素的丰度值,与全国水系沉积物平均值(39种元素)、全国泛滥平原沉积物(54种元素)及全国土壤平均值进行对比。研究发现Hg、Cd高度富集,稀土元素及As、B、Co、Ni、Pb等24种元素在中国南方地区富集,Na2O、CaO、Ba、Sr等4种元素在中国南方的水系沉积物中亏损。
The stream sediment samples were collected from 12 provinces in South China covering 230 million km2.About 100 samples within each 1∶50000 map sheet were mixed to make up one composite sample.5244 composite samples were submitted for analysis.The 76 elements were analyzed including 39 elements originally analyzed in the RGNR Projects,and 37 new elements.The analytical scheme is based largely on ICP-MS,ICP-AES and XRF,supplemented with other techniques.The lowest levels of detection of all elements are less than their crustal abundances.The background values of 76 elements were calculated in Southern China and compared them with the average of national stream sediments,the flood plain sediments,and national sediments and soil.Hg,Cd are highly enriched,REE,As,B,Co,Ni,Pb and other 24 kinds of elements are enriched in Southern China,Na2O,CaO,Ba,and Sr in the sediments are depleted in Southern China.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2011年第5期289-295,共7页
Earth Science Frontiers
基金
国土资源部"百人计划"第六批资助项目"中国南方地区稀有分散元素及贵金属元素地球化学特征与成矿预测"
