白马辉长岩单矿物中稀土元素的中子活化分析和地球化学特征

摘要: 介绍了用预浓集－中子活化分析法测定攀西地区白马辉长岩单矿物中质量分数在１０－９量级的稀土元素。方法包括样品熔融、化学组分离和放射性测量。结果表明，各种单矿物中１０个稀土元素（Ｌａ、Ｃｅ、Ｎｄ、Ｓｍ、Ｅｕ、Ｇｄ、Ｔｂ、Ｔｍ、Ｙｂ和Ｌｕ）的测定值与标准岩石样品的分析值吻合很好。

Abstract: NEUTRON ACTIVATION ANALYSIS OF RARE EARTH ELEMENTS FROM SEPARATE MINERALS IN BAIMA GABBRO FROM PAXI AREA AND THEIR GEOCHEMICAL CHARACTERISTICSYang Ruiying（Institute of High Energy Physics,Laboratory of Nuclear Analysis Techniques,the Chinese Academy of Sciences,P. O. Box 2732,Beijing 100080)Abstract:The determination of rare earth elements of 10-9 level in the separate minaral by preconcentration-neatron activation analysis is described．The process includes sample melting and dissolution, quantitative group separation and activity measurement．The obtained results agree quite well with literature values.Keywords:Preconcentration-neutron activation analysis Rare earth element Separate mineral