金属硫化物Re-Os同位素定年技术进展  

Advances in the analytical methods of metal sulfide Re-Os isotope dating

作　　者：孙胜玲[1] 李杰[1] 许继峰 王桂琴[1,3] SUN ShengLing;LI Jie;XU JiFeng;WANG GuiQin(State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;School of Earth Science and Resources,China University of Geosciences,Beijing 100083,China;CAS Center for Excellence in Comparative Planetology,Hefei 230026,China)

机构地区：[1]中国科学院广州地球化学研究所,同位素地球化学国家重点实验室,广州510640 [2]中国地质大学(北京)地球科学与资源学院,北京100083 [3]中国科学院比较行星学卓越创新中心,合肥230026

出　　处：《岩石学报》2022年第6期1605-1620,共16页Acta Petrologica Sinica

基　　金：国家重点研发计划项目(2020YFA0714800);国家自然科学基金项目(42073061);中国科学院广州地球化学研究所同位素地球化学国家重点实验室技术研发基金(SKLaBIG-JY-19-01)联合资助.

摘　　要：近30年来,Re-Os同位素分析方法在样品溶解、化学分离及质谱测定,以及微区分析等方面取得了重要进展,Re-Os同位素体系已成为同位素地质年代学研究的一个重要手段。本文对近年来金属硫化物Re-Os同位素分析技术的研究发展现状以及存在的问题进行系统评述,包括野外工作和室内金属硫化物矿物精确识别和挑选、样品的分解、分离富集技术到仪器测定、参考标样选择等,并对化学处理过程中如何提高试剂纯度,避免器皿、试剂和环境污染,如何降低实验流程空白等方面给出了建议,可为相关研究者优化Re、Os及其同位素的高精度测试提供参考。Over the past 30 years,the analytic technique of Re-Os isotope of geological samples has been developed and improved constantly,including sample digestion,chemical separation,mass spectrometry determination and micro region analysis methods,and Re-Os isotope system has become important means for the isotope geochronology.This paper systematically reviews the research status and existing problems of Re-Os isotopic analysis technology in recent years,including accurate identification and selection of metal sulfide minerals in field work and in house,sample decomposition,separation and enrichment technology,instrument measurement,and selection of the reference material monitoring,etc.And it also suggests on how to improve the purity of reagents,and avoid utensils,reagents,environmental pollution,and how to reduce experimental process blank in the process of chemical treatment and instrument measurement,which can provide reference for relevant researchers to optimize the high precision determination of Re-Os isotopes.

关 键 词：金属硫化物 RE-OS同位素定年 分离富集技术 实验流程空白 分析技术 

分 类 号：P597[天文地球—地球化学]