Single zircon dating by LAM-ICPMS technique

作     者：Haichen Liu Bingquan Zhu Zhanxia Zhang 

作者机构：Chinese Acad Sci Guangzhou Inst Geochem Guangzhou 510640 Peoples R China Zhongshan Univ Dept Chem Guangzhou 510275 Peoples R China 

出 版 物：《Chinese Science Bulletin》 (科学通报(英文版))

年 卷 期：1999年第44卷第2期

页      面：182-186页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

基　　金：Chinese Academy of Sciences CAS 

主　　题：laser ablation microprobe ICP-MS zircon geochronology. 

摘      要：A UV laser ablation microprobe-inductively coupled plasma mass spectrometry （LAMICPMS） is used to determine the Pb/Pb and Pb/U ages of several zircon grains whose ages have been measured by the conventional U-Pb thermal ionization mass spectrometry （TIMS） method. The mass fractionation factor of Pb isotope ratio was typically between 0.010--0.012 and corrected by NIST610 glass standard. Several factors that influence the stability of Pb/U ratio have been investigated and optimized. The precision of 207pb/206Pb and （206）pb/238U from each sampling crater is within 0.6%—2.4% and 1%—10% respectively, while the precision for the average of mean ratios from different craters is 0.7% and 6% correspondingly. The 207)Pb/206pb and 206pb/238U age differences compared with TIMS results are 《1% and 3% respectively.