重液变温分离单矿物在铷锶年代学中的应用  

Separation of Minerals by Means of Heavy Liquid with Temperature Changing and Its Application in Rb-Sr Geochronology

作　　者：张自超[1] 王桂华[1] 王彩红 

机构地区：[1]地质矿产部宜昌地质矿产研究所,443003

出　　处：《岩矿测试》1992年第4期299-305,共7页Rock and Mineral Analysis

基　　金：本文系国家自然科学基金资助项目4880156中的部分成果。

摘　　要：报道了应用重液变温分离法分离白云母、黑云母、透长石和石英等单矿物,进行铷锶等时线年龄测定的研究结果。这些结果表明,同一单矿物具有微小比重差的组分,其Rb、Sr同位素比值具有明显的线性展布,在铷锶年代学研究中具有良好的应用前景和潜力。The heavy liquid separation with temperature changing has been applied to separate minerals of muscovite, biotite, sanidine and quartz to obtain several fractions with respect to specific gravity difference. All of them were dated by conventional Rb-Sr isochron method. The results obtained indicate that although the difference in specific gravity between the mineral fractions was slight, the Rb-Sr isotopic ratios apparently showed a linear spread. The results suggest that the technique should find further applications in Rb-Sr geochronology.

关 键 词：单矿物 铷 锶 地质年代学 分离 

分 类 号：P597[天文地球—地球化学]