自动化^(40)Ar/^(39)Ar定年设备研制  

Automatic ^(40)Ar/^(39)Ar dating technique using multicollector ArgusVI MS with home-made apparatus

作　　者：邱华宁[1,2] 白秀娟[1] 刘文贵[3] 梅廉夫[1] 

机构地区：[1]中国地质大学(武汉)构造与油气资源教育部重点实验室,湖北武汉430074 [2]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,广东广州510640 [3]中国地质大学(武汉)地质过程与矿产资源国家重点实验室,湖北武汉430074

出　　处：《地球化学》2015年第5期477-484,共8页Geochimica

基　　金：国家重点基础研究发展计划项目(2012CB416706);中国地质大学(武汉)学术创新基地建设项目

摘　　要：自主研发的小型高效气体纯化系统、二氧化碳激光熔样系统、流体包裹体提取系统和空气氩标定系统,与新一代小型高灵敏度多接收稀有气体质谱仪Argus VI联机,建立了激光阶段加热40Ar/39Ar定年、真空击碎流体包裹体40Ar/39Ar定年和空气氩标定等分析测试方法。开放式Qtegra Noble Gas软件和外部设备控制器Peri Con,使用户能够方便地自主增减和控制外部设备,实现计算机自动控制。通过"触点闭合"方式,Qtegra软件触发国产二氧化碳激光加热熔样软件启动,两者协调工作,实现激光阶段加热40Ar/39Ar定年分析的实验流程全自动化。空气氩分析获得了非常稳定的40Ar/36Ar比值,展示了自制空气氩标定系统和小型纯化系统的卓越性能,可资借鉴。新建40Ar/39Ar实验室为开展油气成藏年代学研究提供了一个高精度的测试平台。In this study we designed and developed an efficient preparation system of small volume, a CO2 laser for heating samples, a crusher for extracting fluid inclusions and an air argon system for automatic ^40Ar/^39Ar dating. A new ^40Ar/^39Ar laboratory has thus been established by using these apparatus connected to an ArgusVI mass spectrometer in China University of Geosciences （Wuhan）. The peripheral accessories of third party hardware, such as pneumatic valves, CO2 laser and crusher, can be controlled by the Qtegra Noble Gas software through a PeriCon （peripheral controller）. Therefore, the experimental precedures of air argon analyses,^40Ar/^39Ar dating by laser stepwise heating and by crushing in vacua could be fullly automatically performed. By two hundreds of air argon analyses, we have obtained well concordant atmospheric ^40Ar/^36Ar ratios with a weighted mean of 302.22 ± 0.03 （1σ, MSWD = 0.74）, indicating that all the devices made in-house are effective and reliable This work serves as a pioneer example in China for establishment of a new noble gas laboratory with home-made peripheral accessories except for mass spectrometer.

关 键 词：^40Ar/^39Ar法 二氧化碳激光器 全自动化 自制设备 ArgusVI质谱仪 Qtegra软件 

分 类 号：P597[天文地球—地球化学]