Preprints
https://doi.org/10.5194/egusphere-2024-1788
https://doi.org/10.5194/egusphere-2024-1788
25 Jun 2024
 | 25 Jun 2024
Status: this preprint is open for discussion.

Technical note: „U-Th Analysis” – an open-source software dedicated to MCICPMS U-series-data treatment and evaluation

Inga Kristina Kerber, Fabian Kontor, Sophie Warken, and Norbert Frank

Abstract. We present our standalone data analysis application for 230Th/U dating on multi-collector inductively coupled plasma mass spectrometers (MC-ICP-MS). The Python-based algorithm is equipped with a graphical user interface (GUI) and comprises raw data treatment, corrections, age calculation, and error estimation. Our underlying measurement protocol employs a combination of Faraday cups (FC) and secondary electron multipliers (SEM), and the software allows for different detector layouts for the measurement of the least abundant isotopes 234U, 230Th and 229Th. We especially focus on features that ensure reproducibility and enable user-friendly reanalysis of measurements such as customized calculation constants with templates. Result files are saved automatically and contain all relevant settings used. Eventually, we demonstrate the relevance of adequate data outlier treatment and generally recommend using the median instead of the mean of calculated ratios. The performance of our evaluation software is demonstrated by a case study from a Puerto Rican stalagmite with growth phases from modern to 40 ka old. The majority of the obtained ages reaches uncertainties in the range of 0.3–0.6 %, underlining the capability of our measurement protocol.

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Inga Kristina Kerber, Fabian Kontor, Sophie Warken, and Norbert Frank

Status: open (until 23 Aug 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
Inga Kristina Kerber, Fabian Kontor, Sophie Warken, and Norbert Frank

Model code and software

UTh Data Analysis Fabian Kontor and Inga Kristina Kerber https://github.com/EnvArchivesHD/UTh_Analysis

Inga Kristina Kerber, Fabian Kontor, Sophie Warken, and Norbert Frank

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Short summary
A standalone data analysis application for Th/U dating on multi-collector inductively coupled plasma mass spectrometers features a Python-based algorithm with a graphical user interface. It handles data treatment, corrections, age calculus, and error estimation and supports various detector layouts including Faraday and electron multiplier detectors. Key features include reproducibility, user-friendly reanalysis, and automated data storage. A case study demonstrated the software’s performance.