【摘要】 二端员物质的混合过程在自然界普遍发生。放射性成因的 Ｓｒ， Ｎｄ 同位素体系因其具有源区示踪和长周期时标特性，在混合物组成端员定量分离和混合机制研究中具有特殊意义。本文较详细地介绍了二端员混合过程形成的混合体中元素组成、 Ｓｒ， Ｎｄ 同位素组成之间的相互关系。在此基础上，介绍了二端员混合过程的 Ｓｒ， Ｎｄ 同位素鉴别准则和混合体中混合比 ｆ 的确定方法。更多还原

【Abstract】 Two endmember mixing processes occur everywhere in the natural world. Radiogenic strontium and neodymium istopoes, having natures of tracing source and long term calibration of times, possess important significance for quantitative seperation of endmember components from mixed materials and for study of their mixing mechanism. In the present paper, details are intruduced about the relationships among the elements which compose the mixed materials and the relationships between strontium and neodymium. Also introduced are the details on the basis of the relationships, the criteria for identification of two endmember mixing process and the methods for determination of mixing ratios of the two endmembers in mixed materials by use of strontium and neodymium isotopes.更多还原