ID-TIMS高精度U-Pb年代学的发展  

Development of high precision ID-TIMS U-Pb geochronology

作　　者：朱志勇 唐索寒[1] 王彦斌[3] 李津[1] ZHU Zhi-yong;TANG Suo-han;WANG Yan-bin;LI Jin(MNR Key Laboratory of Isotope Geology,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;MNR SinoProbe Lab,Chinese Academy of Geological Sciences,Beijing 100037,China;Beijing SHRIMP Center,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)

机构地区：[1]自然资源部同位素地质重点实验室,中国地质科学院地质研究所,北京100037 [2]自然资源部深地科学与探测技术实验室,中国地质科学院,北京100037 [3]北京离子探针中心,中国地质科学院地质研究所,北京100037

出　　处：《岩石矿物学杂志》2025年第2期383-397,共15页Acta Petrologica et Mineralogica

基　　金：国家自然科学基金项目(42073015);中国地质科学院基本科研业务费重点攻关项目(JKYZD202311)。

摘　　要：时间是描述一个地质过程或者地质事件的基本物理参数,以放射性同位素的半衰期为标尺,以地球与行星样品为研究对象,形成了同位素地质年代学。地质事件的发生和地质过程持续时间可以约束其发生的原因和形成机制,它是地质研究的前提。高精度的同位素地质年代学迄今已经发展出了多种同位素体系,然而最早制约地球准确年龄、最成熟完善且具有双衰变体系的首推U-Pb年代学体系。从早期溶液法分析发展至现今的激光微区分析或者二次离子质谱法分析U-Pb年代学,U-Pb体系蓬勃发展。然而,迄今所有微区原位U-Pb年代学标样的标定,采用的基准仍然是热电离质谱的稀释剂法(ID-TIMS),因而本研究详细调研了ID-TIMS高精度U-Pb年代学的发展,重点关注其发展过程中里程碑式的事件,最后探讨了高精度年代学对矿床学研究可能的意义和突破点。Time is a basic physical parameter to describe a geological process or geological event.Each radionuclide has a particular half-life,hence,they are applied to investigate different time scales of geological processes according to their half-lives.The occurrence of geological events and the duration of geological processes can restrict their causes and mechanisms,which is the key to reconstruct the geological processes.Currently,many isotope decay systems have been developed to achieve high-precision isotope dating,however,U-Pb chronology system containing double decay system,which is the first tool that precisely restricted the exact age of the earth.From the early solution analysis method to the present in-situ U-Pb geochronology analysis by laser ablation analysis or secondary ion mass spectrometry,U-Pb system has developed vigorously.The only tool for the calibration of all in-situ U-Pb geochronology standards is the double-spike diluent method of thermal ionization mass spectrometry(ID-TIMS).Therefore,this study reviewed the development of high-precision ID-TIMS U-Pb geochronology in detail,where we focused on the milestone events in its development process.Finally,the potential applications of high precision geochronology for ore deposit research are discussed.

关 键 词：ID-TIMS 高精度U-Pb定年 U-Pb体系发展史 铁氧化物 成矿年代学 

分 类 号：P597.3[天文地球—地球化学]