Geochronology
Geochronology
GChron
Articles | Volume 2, issue 1
Articles | Volume 2, issue 1
https://doi.org/10.5194/gchron-2-155-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/gchron-2-155-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 2, issue 1
Research article
 | 
30 Jun 2020
Research article |  | 30 Jun 2020

Evaluating the reliability of U–Pb laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) carbonate geochronology: matrix issues and a potential calcite validation reference material

Marcel Guillong, Jörn-Frederik Wotzlaw, Nathan Looser, and Oscar Laurent

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Short summary
The dating of carbonates by laser ablation inductively coupled plasma mass spectrometry is improved by an additional, newly characterised reference material and adapted data evaluation protocols: the shape (diameter to depth) of the ablation crater has to be as similar as possible in the reference material used and the unknown samples to avoid an offset. Different carbonates have different ablation rates per laser pulse. With robust uncertainty propagation, precision can be as good as 2–3 %.
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Special issue
In situ carbonate U–Pb geochronology