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    Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis

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    Name:
    Reiners_GGR0409_Rev.pdf
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    Description:
    Final Accepted Manuscript
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    Author
    Nasdala, Lutz
    Corfu, Fernando
    Valley, John W.
    Spicuzza, Michael J.
    Wu, Fu-Yuan
    Li, Qiu-Li
    Yang, Yue-Heng
    Fisher, Chris
    Münker, Carsten
    Kennedy, Allen K.
    Reiners, Peter W.
    Kronz, Andreas
    Wiedenbeck, Michael
    Wirth, Richard
    Chanmuang, Chutimun
    Zeug, Manuela
    Váczi, Tamás
    Norberg, Nicholas
    Häger, Tobias
    Kröner, Alfred
    Hofmeister, Wolfgang
    Show allShow less
    Affiliation
    University of Arizona
    Issue Date
    2016-12
    Keywords
    zircon
    reference material
    SIMS
    U-Pb geochronology
    oxygen isotopes
    hafnium isotopes
    lithium isotopes
    
    Metadata
    Show full item record
    Publisher
    WILEY-BLACKWELL
    Citation
    Zircon M127 - A Homogeneous Reference Material for SIMS U-Pb Geochronology Combined with Hafnium, Oxygen and, Potentially, Lithium Isotope Analysis 2016, 40 (4):457 Geostandards and Geoanalytical Research
    Journal
    Geostandards and Geoanalytical Research
    Rights
    © 2016 The Authors. Geostandards and Geoanalytical Research © 2016 International Association of Geoanalysts.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    In this article, we document a detailed analytical characterisation of zircon M127, a homogeneous 12.7 carat gemstone from Ratnapura, Sri Lanka. Zircon M127 has TIMS-determined mean U-Pb radiogenic isotopic ratios of 0.084743 +/- 0.000027 for Pb-206/U-238 and 0.67676 +/- 0.00023 for Pb-207/U-235 (weighted means, 2s uncertainties). Its Pb-206/U-238 age of 524.36 +/- 0.16 Ma (95% confidence uncertainty) is concordant within the uncertainties of decay constants. The delta O-18 value (determined by laser fluorination) is 8.26 +/- 0.06 parts per thousand VSMOW (2s), and the mean Hf-176/Hf-177 ratio (determined by solution ICP-MS) is 0.282396 +/- 0.000004 (2s). The SIMS-determined delta Li-7 value is -0.6 +/- 0.9 parts per thousand (2s), with a mean mass fraction of 1.0 +/- 0.1 mu g g(-1) Li (2s). Zircon M127 contains similar to 923 mu g g(-1) U. The moderate degree of radiation damage corresponds well with the time-integrated self-irradiation dose of 1.82 x 10(18) alpha events per gram. This observation, and the (U-Th)/He age of 426 +/- 7 Ma (2s), which is typical of unheated Sri Lankan zircon, enable us to exclude any thermal treatment. Zircon M127 is proposed as a reference material for the determination of zircon U-Pb ages by means of SIMS in combination with hafnium and stable isotope (oxygen and potentially also lithium) determination.
    Note
    12 month embargo. First available online 16 July 2016.
    ISSN
    16394488
    DOI
    10.1111/ggr.12123
    Version
    Final accepted manuscript
    Sponsors
    Faculty of Geosciences, Geography and Astronomy, University of Vienna; Beijing SHRIMP Centre, Chinese Academy of Geological Sciences; European Commission [MEXC-CT-2005-024878]; FWF Austrian Science Fund [P20028-N10, P24448-N19]; U.S. National Science Foundation [EAR 1524336]
    Additional Links
    http://doi.wiley.com/10.1111/ggr.12123
    ae974a485f413a2113503eed53cd6c53
    10.1111/ggr.12123
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