Geochronology
Geochronology
GChron
Articles | Volume 4, issue 2
Articles | Volume 4, issue 2
https://doi.org/10.5194/gchron-4-561-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-4-561-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 4, issue 2
Research article
 | 
19 Aug 2022
Research article |  | 19 Aug 2022

An algorithm for U–Pb geochronology by secondary ion mass spectrometry

Pieter Vermeesch

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Latest update: 29 Jun 2024
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Short summary
Secondary ion mass spectrometry (SIMS) is the oldest and most sensitive analytical technique for in situ U–Pb geochronology. This paper introduces a new algorithm for SIMS data reduction that treats data as compositional data, which means that the relative abundances of 204Pb, 206Pb, 207Pb, and 238Pb are processed within a tetrahedral data space or simplex. The new method is implemented in an eponymous computer programme that is compatible with the two dominant types of SIMS instruments.
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