分子活化分析法研究地质样品中铂族元素的化学种态  

STUDY ON THE CHEMICAL SPECIES OF PLATINUM GROUP ELEMENTS IN GEOLOGICAL SAMPLES BY MOLECULAR ACTIVATION ANALYSIS

作　　者：吕娅丽[1] 毛雪瑛[1] 李晓林[1] 欧阳宏[1] 李世红[1] 张朝晖[1] 柴之芳[1] 

机构地区：[1]中国科学院高能物理研究所核分析技术重点实验室,北京100039

出　　处：《核化学与放射化学》2002年第1期11-15,共5页Journal of Nuclear and Radiochemistry

基　　金：国家自然科学基金资助项目 (19875 0 61和 1993 5 0 2 0 );中国科学院重要方向性基金资助项目 (KJCX2 N10 )

摘　　要：用化学逐级溶解、镍锍火试金预富集及中子活化分析法研究了中国东部大陆地幔橄榄岩捕掳体中铂族元素的化学种态。分析结果表明 ,6个物相中单个铂族元素的质量分数加和与铂族元素总量分析结果基本相符 ;硫化物相中铂族元素分布特征的研究 ,进一步说明了硫化物的熔出是部分熔融过程中地幔橄榄岩铂族元素分异的重要机制之一。The chemical species of platinum group elements in some upper mantle derived xenoliths from Eastern China are studied by molecular activation analysis,in which the chemical stepwise dissolution,nickel fire assay preconcentration and neutron activation analysis are jointly applied. The weighted sums of platinum group elements in 6 phases are in agreement with their total contents.The distribution patterns of platinum group elements in sulphides show that sulphide segregation is one of the important mechanisms for the fractionation of platinum group elements in upper mantle derived material during partial melting.

关 键 词：分子活化分析 铂族元素 地幔捕掳体 化学种态 分布 地质样品 

分 类 号：P595[天文地球—地球化学]