硫化物Re-Os同位素定年分析方法及其在矿床年代学中的应用:研究现状及存在问题  

Analytical Methods and Application of Sulfide Re-Os Isotope Dating of Mineral Deposits:Research Progress and Problems

作　　者：吕串 高剑峰[1] 漆亮[1] 黄小文[1] Lyu Chuan;Gao Jianfeng;Qi Liang;Huang Xiaowen(State Key Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China)

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州贵阳550081

出　　处：《地球科学》2023年第12期4387-4403,共17页Earth Science

基　　金：国家自然科学基金项目(No.42103070);国家杰出青年科学基金(No.42025301)。

摘　　要：近年来,得益于分析方法和测试技术的提升,低Re含量的硫化物以及氧化物被用于Re-Os同位素定年,为矿床成因的研究提供了年代学基础.然而,随着数据的积累和研究工作的不断精细,硫化物的Re-Os同位素定年也显现出一些问题.从样品的采集和处理,元素的分离富集到仪器测试,每个环节都有可能影响Re-Os同位素定年结果的准确性及精度.本文综述了硫化物Re-Os同位素体系的主要特点,系统介绍了Re-Os同位素分析所采用的分离富集方法以及质谱分析技术,并对影响硫化物Re-Os同位素定年的主要因素进行了系统的探讨,最后总结了利用Re-Os同位素进行矿床定年工作的注意事项,以期对相关研究人员提供一定的参考.With the development of chemical procedures and instrumental analyses,Re-Os isotopes in low-Re sulfides and oxides have been precisely analyzed,making it possible to date more types of deposits and reveal ore genesis.However,accumulating data and refinement research work have revealed many problems in the application of sulfides Re-Os dating.Processes including sample collection,Re and Os separation and purification and instrumental analysis,could affect the results of Re-Os isotopic compositions.In this article it reviews the characteristics of sulfides Re-Os isotope system,introduces separation and purification methods,and mass spectrometry analysis techniques,and systematically discusses possible influencing factors of sulfide Re-Os dating.A summary of precautions during the Re-Os dating works,to provide some help for future works.

关 键 词：RE-OS同位素 硫化物 矿床年代学 分析方法 矿床 

分 类 号：P736.4[天文地球—海洋地质]