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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 PGs in the entrapped mantle peridotite from the eastern Chinese mainland were studied by chemical stepwise dissolution, pre-enrichment with nickel matte gold and neutron activation analysis. The results show that the sum of the mass fractions of single platinum group elements in six phases basically agrees with the analysis results of the total amount of platinum group elements. The study of the distribution characteristics of the platinum group elements in the sulfide phase further illustrates that the sulfide melting out is One of the important mechanisms for the differentiation of PGs in the mantle peridotite during partial melting.