In situ determination of hafnium isotopes from rutile using LA-MC-ICP-MS
作者单位：State Key Laboratory of Lithospheric EvolutionInstitute of Geology and GeophysicsChinese Academy of Sciences College of Earth ScienceUniversity of Chinese Academy of Sciences
会议名称：《中国科学院地质与地球物理研究所2015年度（第15届）学术年会》
会议日期：2016年
学科分类：070902[理学-地球化学] 0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学]
基 金：supported by the National Natural Science Foundation of China(Grants Nos.41130313&41525012)
关 键 词：rutile hafnium isotope in situ laser ablation MC-ICP-MS khondalite
摘 要：The hafnium isotopic analysis using laser ablation has been widely conducted on Hf-rich minerals(zircon/baddeleyite/calzirtite/eudialyte),however,little work has been reported on Hf-poor(100 ppm)*** work presents a detailed procedure of in situ hafnium isotopic analysis from rutile using laser ablation multiple collector inductively coupled plasma mass spectrometry(LA-MC-ICP-MS).The rutile U-Pb dating reference material JDX shows homogeneous hafnium isotopic ratios,withHf/Hf=0.281795±0.000015(2SD,n=33)andLu/Hf=0.000018±0.000004(2SD,n=17)that suggest the possibility of using JDX as a new reference material hafnium isotopic *** also measure hafnium isotopic compositions of other rutile U-Pb dating reference material(R10,Sugluk-4 and PCA-S207)and theHf/Hf values are similar to previously reported results,which confirms that we can acquire accurate and precise hafnium isotopic compositions using our developed analytical *** analyzed hafnium isotopic compositions and U-Pb ages of rutile in high-temperature and ultrahigh-temperature granulites from various terrains of the Khondahte Belt from the North China Craton,combined with zircon results in the same area,suggesting that the metamorphic evolution history of the granulite is much more complicated than previously thought.