Articles | Volume 2, issue 1
Geochronology, 2, 155–167, 2020
https://doi.org/10.5194/gchron-2-155-2020

Special issue: In situ carbonate U–Pb geochronology

Geochronology, 2, 155–167, 2020
https://doi.org/10.5194/gchron-2-155-2020

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 et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to revisions (further review by editor and referees) (28 Apr 2020) by Axel Gerdes
AR by Marcel Guillong on behalf of the Authors (11 May 2020)  Author's response    Manuscript
ED: Publish as is (20 May 2020) by Axel Gerdes
ED: Publish as is (20 May 2020) by Klaus Mezger(Editor)
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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 %.