Determination of lead isotope compositions of geological samples using femtosecond laser ablation MC-ICPMS  

作　　者：YUAN HongLin CHEN KaiYun BAO ZhiAn ZONG ChunLei DAI MengNing FAN Chao YIN Cong 

机构地区：[1]State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University

出　　处：《Chinese Science Bulletin》2013年第32期3914-3921,共8页

基　　金：supported by the National Natural Science Foundation of China (40973011);the State Key Laboratory of Independent Research Key Topics of Special Funds from the Ministry of Science and Technology (CJ11070);the MOST Research Foundation from the State Key Laboratory of Continental Dynamics

摘　　要：Lead isotopic compositions of international silicate glasses,feldspar and copper-based samples are obtained using femtosecond laser ablation multiple collector inductively coupled plasma mass spectrometry(fLA-MC-ICPMS).Some international glass standards for the microanalysis are applied to evaluate the method reported here.The Pb isotopic composition of these NIST glasses(SRM 610,612,614),USGS(BHVO-2G,BCR-2G,BIR-1G and GSD-1G)and MPI-DING glasses(GOR132-G,KL2-G,T1-G,StHs60/80-G)agree well with recommended values in 2 s error.One of 15 copper-based metals is found to have homogenized Pb isotope data and can be used as an external calibration standard and quality control sample for chalcopyrite,ancient coins,etc.,to trace the genesis of metal deposit and culture exchange among different dynasties(GBW02137,208Pb/204Pb=37.9661±0.0005(2 s),207Pb/204Pb=15.5770±0.0002(2 s),206Pb/204Pb=17.7462±0.0002(2 s)).We also prepared a feldspar glass to serve as the external calibration standard/QC for Pb isotope analysis using fLA-MC-ICPMS.Lead isotopic compositions of international silicate glasses, feldspar and copper-based samples are obtained using femtosecond laser ablation multiple collector inductively coupled plasma mass spectrometry （fLA-MC-ICPMS）. Some international glass standards for the microanalysis are applied to evaluate the method reported here. The Pb isotopic composition of these NIST glasses （SRM 610, 612, 614）, USGS （BHVO-2G, BCR-2G, BIR-1G and GSD-1G） and MPI-DING glasses （GOR132-G, KL2-G, TI-G, StHs60/80-G） agree well with recommended values in 2 s error. One of 15 copper-based metals is found to have homoge- nized Pb isotope data and can be used as an external calibration standard and quality control sample for chalcopyrite, ancient coins etc., to trace the genesis of metal deposit and culture exchange among different dynasties （ GBW02137, 208pb/204pb = 37.9661 ± 0.0005 （2 s）, 207pb/204pb = 15.5770±0.0002 （2 s）, 206pb/204pb = 17.7462±0.0002 （2 s））. We also prepared a feldspar glass to serve as the external calibration standard/QC for Pb isotope analysis using fLA-MC-ICPMS.

关 键 词：铅同位素组成 地质样品 激光烧蚀 多接收电感耦合等离子体质谱 飞秒 硅酸盐玻璃 美国地质调查局 测定 

分 类 号：P597[天文地球—地球化学]