摘要
本文通过大量实例综述了近年萤石Sr、Nd同位素在定年和示踪方面取得的进展 ,结果表明 :萤石Sm-Nd同位素可以用于测定成矿作用的时代 ,但由于萤石Nd同位素初始值存在不均一性和受次生干扰的影响 ,所获数据最好用其它测年方法获得的数据加以验证 ;萤石Sr、Nd同位素组成是示踪成矿流体来源的有效方法 ,利用Sr、Nd同位素组成还可定量估算出形成成矿流体不同端元所占的比例。
In recent years, great advance has been made in Sr-Nd isotope geochemistry of fluorites, especially in dating and tracing. Detailed Sr-Nd isotopic geochemistry study of fluorites shows: (1) the Sm-Nd isotope dating of fluorites may directly indicate metallogenetic epoch, but because of initial isotopic heterogeneity and secondary disturbance of the Sm-Nd system in fluorites, the age of ore-formation requires confirmation by other independent geochronometers, (2) it is very useful to trace the origin and quantitatively estimate the end-member ratios of ore-forming fluids in terms of the Sr-Nd isotopic composition of fluorites.
出处
《地质地球化学》
CSCD
2001年第4期27-34,共8页
Geology-Geochemistry
基金
国家攀登计划预选项目 ( 95 -预 -39)
