Geochronology
Geochronology
GChron
Articles | Volume 8, issue 4
Articles | Volume 8, issue 4
https://doi.org/10.5194/gchron-8-679-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-8-679-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 8, issue 4
Research article
 | 
29 Oct 2026
Research article |  | 29 Oct 2026

Analytical strategies for 207Pb ∕ 235U carbonate geochronology

Dawid Szymanowski, Marcel Guillong, Pieter Vermeesch, and Philip J. Hopley

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Short summary
U–Pb geochronology of carbonates using 238U and 206Pb can be inaccurate beyond ca. 1.5 Ma. This paper explores analytical strategies to use the more accurate, alternative approach using 235U and 207Pb. Solution mode and laser ablation analyses of reference materials and of a southern African speleothem demonstrate that this method is widely applicable, improving the ability to provide accurate carbonate chronologies, particularly in the freshwater realm.
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