典型文献
Long-Term Reproducibility of SIMS Zircon U-Pb Geochronology
文献摘要：
Secondary ion mass spectrometry (SIMS) zircon U-Pb dating has been widely used to confine the absolute ages of the magmatic or metamorphic events and to distinguish multiple events. Here, a data set consisting of the zircon standards dating data (～15000 Ple?ovice and～8000 Qinghu items) accumulated for more than 8 years using the CAMECA IMS 1280HR of the Institute of Geology and Geophysics, Chinese Academy of Sciences (IGGCAS) is compiled to evaluate the long-term exter- nal reproducibility. With Ple?ovice zircon as the calibration standard and Qinghu zircon as an un- known sample, the analytical uncertainties for single-spot (n = 7723) and session analyses (n = 691, with more than 7 single spot analyses in one session) are 2.6％and 0.9％(2RSD, relative standard devi- ation), respectively. It means that single-spot U-Pb dating for a standard-level zircon sample could vary 5.2％at 95％confidence level, while the average value (n>7) for each session may vary 1.8％. Thus, these values should be considered as the minimum uncertainty when comparing single spot and individ- ual session analysis results for multiple dating works on a certain geological event.
文献关键词：
中图分类号：
作者姓名：
Wenhao Zhao;Qiuli Li;Yu Liu;Guoqiang Tang;Xiaoxiao Ling;Jiao Li;Xianhua Li
作者机构：
State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China
文献出处：
引用格式：
[1]Wenhao Zhao;Qiuli Li;Yu Liu;Guoqiang Tang;Xiaoxiao Ling;Jiao Li;Xianhua Li-.Long-Term Reproducibility of SIMS Zircon U-Pb Geochronology)[J].地球科学学刊（英文版）,2022(01):17-24
A类：
Reproducibility,CAMECA,1280HR,IGGCAS,2RSD
B类：
Long,Term,SIMS,Zircon,Pb,Geochronology,Secondary,mass,spectrometry,zircon,dating,has,been,widely,used,confine,absolute,ages,magmatic,metamorphic,events,distinguish,multiple,Here,data,set,consisting,standards,Ple,ovice,Qinghu,items,accumulated,more,than,years,using,Institute,Geology,Geophysics,Chinese,Academy,Sciences,compiled,evaluate,long,term,exter,reproducibility,With,calibration,known,sample,analytical,uncertainties,single,spot,session,analyses,one,are,relative,devi,respectively,It,means,that,level,could,vary,confidence,while,average,each,may,Thus,these,values,should,considered,minimum,uncertainty,when,comparing,individ,ual,analysis,results,works,geological
AB值：
0.549491
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