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Matrix effects and improved calibration procedures for SIMS titanite U-Pb dating

文献类型：期刊论文

作者Ling, Xiao-Xiao1,2; Li, Qiu-Li1,2,3; Huyskens, Magdalena H.4; Liu, Yu1,2; Yin, Qing-Zhu4; Tang, Guo-Qiang1,2,3; Li, Jiao1,2; Zhang, Hua-Feng5; Skublov, Sergey G.6,7; Melnik, Aleksey E.1
刊名CHEMICAL GEOLOGY
出版日期2022-03-30
卷号593页码:10
关键词Titanite U-Pb dating SIMS Matrix effect Iron content
ISSN号0009-2541
DOI10.1016/j.chemgeo.2022.120755
英文摘要Titanite is a U-bearing accessory mineral that can serve as a geochronometer. Compared with zircon, titanite is more likely to contain multi-stage fluid-induced growth. Thus, individual titanite grains may yield complex U-Pb ages that reveal the entire geological history of the rock. Secondary ion mass spectrometry (SIMS), which has high sensitivity and spatial resolution, is a good choice for U-Pb titanite analyses. A titanite U-Pb standard named YQ82 was developed with Pb-206/U-238 age of 1837.6 +/- 1.0 Ma (2 standard error (SE), n = 4) and Pb-207/Pb-206 age of 1845. 0 +/- 1.1 Ma (2SE, n = 4), as determined herein using isotope dilution isotope ratio mass spectrometry (ID-IRMS). However, U-Pb dating of YQ82 via SIMS yielded a bias of up to 14% compared to the ID-IRMS value, indicating a matrix effect. To correct for this matrix effect, six U-Pb titanite dating reference materials (RMs) were analyzed. Based on the correlations between the age biases and the Fe contents of the six RMs, a calibration protocol was established using the index of the Fe content (FeO+/IP, intensity of primary beam) and a power-law relationship between the calibrated Pb+/U+ and UO+/U+. Using this calibration protocol, the U-Pb ages decreased the age bias from approximately +/- 14% to +/- 1.4%. To test the protocol, a titanite sample (BMB108) with a low Fe content (Fe2O3, 0.4 wt%) was calibrated using MKED1 (Fe2O3, 1.5 wt%) as the RM. Without the calibration, the apparent SIMS Pb-206/U-238 age was 10% younger than the thermal ionization mass spectrometry (TIMS) Pb-206/U-238 age (1890 +/- 4 Ma). Using the calibration method, the apparent SIMS U-Pb age was 1898 +/- 14 Ma (2SE, n = 19), which is consistent with the TIMS age. This study shows that a considerable matrix effect related to Fe content is present in the SIMS titanite U-Pb dating results. The calibration protocol developed herein improved the SIMS titanite U-Pb dating accuracy, yielding a more accurate thermal history of the samples.
WOS关键词IN-SITU U ; TRACE-ELEMENT ; POLYGENETIC TITANITE ; ZIRCON ; GEOCHRONOLOGY ; AGE ; TEMPERATURE ; EVOLUTION ; METAMORPHISM ; ROCKS
资助项目National Key Research and Development Plan[2018YFA0702600] ; National Natural Science Foundation of China[42173037] ; National Natural Science Foundation of China[41773044] ; National Natural Science Foundation of China[41773047] ; National Natural Science Foundation of China[41673059]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000768027500007
出版者ELSEVIER
资助机构National Key Research and Development Plan ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Key Research and Development Plan ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/105038]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Li, Qiu-Li
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Univ Calif Davis, Dept Earth & Planetary Sci, One Shields Ave, Davis, CA 95616 USA
5.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
6.Russian Acad Sci, Inst Precambrian Geol & Geochronol, St Petersburg 199034, Russia
7.St Petersburg Min Univ, St Petersburg 199106, Russia
推荐引用方式
GB/T 7714		 Ling, Xiao-Xiao,Li, Qiu-Li,Huyskens, Magdalena H.,et al. Matrix effects and improved calibration procedures for SIMS titanite U-Pb dating[J]. CHEMICAL GEOLOGY,2022,593:10.
APA Ling, Xiao-Xiao.,Li, Qiu-Li.,Huyskens, Magdalena H..,Liu, Yu.,Yin, Qing-Zhu.,...&Li, Xian-Hua.(2022).Matrix effects and improved calibration procedures for SIMS titanite U-Pb dating.CHEMICAL GEOLOGY,593,10.
MLA Ling, Xiao-Xiao,et al."Matrix effects and improved calibration procedures for SIMS titanite U-Pb dating".CHEMICAL GEOLOGY 593(2022):10.

入库方式： OAI收割

来源：地质与地球物理研究所

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