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.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/621937 |
| Date | 12 1900 |
| Creators | 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 |
| Contributors | University of Arizona, Institut für Mineralogie und Kristallographie; Universität Wien; 1090 A Wien Austria, Department of Geosciences; University of Oslo; N-0316 Oslo Norway, Department of Geoscience; University of Wisconsin; Madison WI 53706 USA, Department of Geoscience; University of Wisconsin; Madison WI 53706 USA, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing 100029 China, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing 100029 China, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing 100029 China, School of the Environment; Washington State University; Pullman WA 99164 USA, Institut für Geologie und Mineralogie; Universität zu Köln; D-50939 Köln Germany, Department of Imaging and Applied Physics; Curtin University of Technology; Bentley 6102 Australia, Department of Geosciences; University of Arizona; Tucson AZ 85721 USA, Geowissenschaftliches Zentrum; Georg-August-Universität Göttingen; D-37077 Göttingen Germany, Helmholtz-Zentrum Potsdam; Deutsches GeoForschungsZentrum; D-14473 Potsdam Germany, Helmholtz-Zentrum Potsdam; Deutsches GeoForschungsZentrum; D-14473 Potsdam Germany, Faculty of Gems; Burapha University; Chanthaburi 22170 Thailand, Institut für Mineralogie und Kristallographie; Universität Wien; 1090 A Wien Austria, Institut für Mineralogie und Kristallographie; Universität Wien; 1090 A Wien Austria, Institut für Mineralogie und Kristallographie; Universität Wien; 1090 A Wien Austria, Institut für Geowissenschaften; Johannes Gutenberg-Universität; D-55099 Mainz Germany, Institut für Geowissenschaften; Johannes Gutenberg-Universität; D-55099 Mainz Germany, Institut für Geowissenschaften; Johannes Gutenberg-Universität; D-55099 Mainz Germany |
| Publisher | WILEY-BLACKWELL |
| Source Sets | University of Arizona |
| Language | English |
| Detected Language | English |
| Type | Article |
| Rights | © 2016 The Authors. Geostandards and Geoanalytical Research © 2016 International Association of Geoanalysts |
| Relation | http://doi.wiley.com/10.1111/ggr.12123 |
Page generated in 0.0027 seconds