应用仪器中子活化分析法研究海南岛玻璃陨石的微量元素地球化学特征

Analysis of trace-elemental geochemical characteristics of glassy meteorites from Hainan Island by INAA

采用仪器中子活化分析法测定了海南岛玻璃陨石中２０多个元素的含量．通过对稀土元素及其它微量元素地球化学特征的研究，推测海南岛玻璃陨石的源岩可能是较年轻的沉积物。为了检验方法的准确度和精密度，分析了美国国家地质局的标准物质ＵＳＧＳ—ＢＣＲ—１及中国标准岩石ＧＳＲＩ、ＧＳＲ３，其相对标准偏差小于５％。

The concentrations of more than 20 elements in the glassy meteorites from Hainan Island, China have been measured by INAA. Precision and accuracy of the INAA method have been evaluated by using USGS and Chinese standard reference materials (GSR), indicating that relative standard deviations for most element are less than 5%. A comparative study on the REE patterns and other trace elements shows that the geochemical characteristics of the glassy meteorites from Hainan Island are close to those of the Chinese continental sediment and the North America shale, implying that their parent rock is younger sediment.