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Simultaneous in-situ determination of U-Pb age and trace elements in zircon by LA-ICP-MS in 20 μm spot size

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  • Geochemistry
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Chinese Science Bulletin

Abstract

Simultaneous in-situ determination of U-Pb ages and 20 trace elements of three international zircon standards (91500, GJ1 and TEMORA 1) and one laboratory zircon standard (SK10-2) separated from Cenozoic fine-grained gabbro was carried out on quadrupole ICP-MS equipped with 193 nm excimer laser in 20 μm spot size. The weighted mean 206Pb/238U ages of 91500, GJ1 and TEMORA 1 are 1064.4±4.8 Ma (2σ), 603.2±2.4 Ma (2σ) and 418.2±2.4 Ma (2σ), respectively. The relative standard deviations (RSDs) of 206Pb/238U ages (2σ) are less than 2.2% for single measurements and 0.6% for weighted means. The obtained weighted mean 206Pb/238U ages of three standard zircons agree with the recommended values within 2σ error. The weighted mean 206Pb/238U age of SK10-2 is 31.42±0.25 Ma (2σ) and the RSDs of 206Pb/238U ages (2σ) are between 2.4% and 5.7% for single measurements and less than 0.8% for weighted mean. The obtained weighted mean 206Pb/238U age is in good agreement with the age obtained by Yuan (2004). Trace element concentrations of NIST612 and NIST614 obtained under the same LA-ICP-MS operating conditions agree with the recommended values within analytical error. The results indicate that it is possible to measure U-Pb age and trace elements simultaneously by LA-ICP-MS in a small spot size of 20 μm.

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Authors and Affiliations

  1. National Key Laboratory of Geological Processes and Mineral Resources, Faculty of Earth Sciences, China University of Geosciences, Wuhan, 430074, China

    Liu XiaoMing & Gao Shan

  2. National Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an, 710069, China

    Liu XiaoMing, Gao Shan, Diwu ChunRong, Yuan HongLin & Hu ZhaoChu

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  1. Liu XiaoMing
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  2. Gao Shan
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  3. Diwu ChunRong
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  4. Yuan HongLin
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  5. Hu ZhaoChu
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Correspondence to Liu XiaoMing.

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Supported by the National Natural Science Foundation of China (Grant Nos. 40472099, 40521001 and 40673019) and Chinese Ministry of Education (Grant Nos. IRT0441 and 306021)

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Liu, X., Gao, S., Diwu, C. et al. Simultaneous in-situ determination of U-Pb age and trace elements in zircon by LA-ICP-MS in 20 μm spot size. CHINESE SCI BULL 52, 1257–1264 (2007). https://doi.org/10.1007/s11434-007-0160-x

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  • DOI: https://doi.org/10.1007/s11434-007-0160-x

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