石英样品Ar-Ar定年测试过程中的相关问题及解决方法

摘要

针对石英样品阶段升温Ar-Ar定年测试过程中所遇到的放射成因40Ar较少、过剩Ar干扰等问题,通过挑选石英样品及前处理、双真空炉多次循环加热去气、增加中间温度段数量、氩的再富集等解决方法,最终获得了较理想的年龄结果.%In the process of Ar-Ar dating for quartz sample,less radioactive 40Ar from the decay and excess back ground 40Ar brings problem and interference to the age measurement.To solve these problems,we improved the experimental method by screening and pre-treating quartz sample,multiple loop degassing in double vacuum furnace,increasing the quantity of medium temperature stage,re-enriching argon etc,and more ideal ages were acquired.