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Article

LKZ-1: A New Zircon Working Standard for the In Situ Determination of U–Pb Age, O–Hf Isotopes, and Trace Element Composition

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Korea Basic Science Institute, Cheongju 28119, Korea
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Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Korea
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Core Research Facilities, Pusan National University, Busan 46241, Korea
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Korea Polar Research Institute, Incheon 21990, Korea
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Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100027, China
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Jack Satterly Geochronology Laboratory, University of Toronto, Toronto, ON M5S 3B1, Canada
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(5), 325; https://doi.org/10.3390/min9050325
Received: 3 April 2019 / Revised: 23 May 2019 / Accepted: 24 May 2019 / Published: 27 May 2019
(This article belongs to the Section Mineral Geochemistry and Geochronology)
This study introduces a new zircon reference material, LKZ-1, for the in situ U–Pb dating and O–Hf isotopic and trace element analyses. The secondary ion mass spectrometric analyses for this gem-quality single-crystal zircon yielded a weighted mean 206Pb/238U age of 572.6 ± 2.0 Ma (2σ, n = 22, MSWD = 0.90), with moderately high U concentrations (619 ± 21 ppm, 1 SD), restricted Th/U ratios (0.146 ± 0.002, 1 SD), and negligible common Pb content (206Pbc < 0.2%). A comparable 206Pb/238U age (570.0 ± 2.5 Ma, 2σ) was produced by the isotope dilution-thermal ionization mass spectrometry. The secondary ion mass spectrometric and laser ablation-assisted multiple collector inductively coupled plasma mass spectrometer analyses respectively showed that LKZ-1 had little variation in O (δ18OV-SMOW = 10.65 ± 0.14‰; laser fluorination value = 10.72 ± 0.02‰; 1 SD) and Hf (176Hf/177Hf = 0.281794 ± 0.000016, 1 SD) isotopic compositions. LKZ-1 was also fairly homogeneous in its chemical composition (RSD of laser ablation ICPMS data ≤ 10%), displaying a relatively uniform chondrite-normalized rare earth element pattern ((Lu/Gd)N = 31 ± 3, Eu/Eu* = 0.43 ± 0.17, Ce/Ce* = 44 ± 32; 1 SD). These consistencies suggest that the LKZ-1 zircon is a suitable working standard for geochronological and geochemical analyses. View Full-Text
Keywords: zircon; working standard; LKZ-1; U–Pb age; O isotopes; Hf isotopes; trace element zircon; working standard; LKZ-1; U–Pb age; O isotopes; Hf isotopes; trace element
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MDPI and ACS Style

Cheong, A.C.-s.; Jeong, Y.-J.; Lee, S.; Yi, K.; Jo, H.J.; Lee, H.-S.; Park, C.; Kim, N.K.; Li, X.-H.; Kamo, S.L. LKZ-1: A New Zircon Working Standard for the In Situ Determination of U–Pb Age, O–Hf Isotopes, and Trace Element Composition. Minerals 2019, 9, 325. https://doi.org/10.3390/min9050325

AMA Style

Cheong AC-s, Jeong Y-J, Lee S, Yi K, Jo HJ, Lee H-S, Park C, Kim NK, Li X-H, Kamo SL. LKZ-1: A New Zircon Working Standard for the In Situ Determination of U–Pb Age, O–Hf Isotopes, and Trace Element Composition. Minerals. 2019; 9(5):325. https://doi.org/10.3390/min9050325

Chicago/Turabian Style

Cheong, Albert C.-s., Youn-Joong Jeong, Shinae Lee, Keewook Yi, Hui J. Jo, Ho-Sun Lee, Changkun Park, Nak K. Kim, Xian-Hua Li, and Sandra L. Kamo 2019. "LKZ-1: A New Zircon Working Standard for the In Situ Determination of U–Pb Age, O–Hf Isotopes, and Trace Element Composition" Minerals 9, no. 5: 325. https://doi.org/10.3390/min9050325

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