Articles | Volume 7, issue 3
https://doi.org/10.5194/gchron-7-409-2025
https://doi.org/10.5194/gchron-7-409-2025
Research article
 | 
04 Sep 2025
Research article |  | 04 Sep 2025

Interlaboratory reproducibility of ID-TIMS U–Pb geochronology evaluated with a pre-spiked natural zircon solution

Dawid Szymanowski, Jörn-Frederik Wotzlaw, Maria Ovtcharova, Blair Schoene, Urs Schaltegger, Mark D. Schmitz, Ryan B. Ickert, Cyril Chelle-Michou, Kevin R. Chamberlain, James L. Crowley, Joshua H. F. L. Davies, Michael P. Eddy, Sean P. Gaynor, Alexandra Käßner, Michael T. Mohr, André N. Paul, Jahandar Ramezani, Simon Tapster, Marion Tichomirowa, Albrecht von Quadt, and Corey J. Wall

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Latest update: 02 Oct 2025
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Short summary
We present the first community-wide evaluation of the reproducibility of U–Pb zircon geochronology by isotope dilution thermal ionisation mass spectrometry (ID-TIMS). Eleven labs analysed aliquots of the same, homogenised, pre-spiked solution of natural zircon, which removed geological bias inherent to using heterogeneous natural zircon grain populations. We discuss remaining sources of inter-lab bias and propose areas of improvement to analytical procedures.
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