Articles | Volume 4, issue 2
Geochronology, 4, 561–576, 2022
Geochronology, 4, 561–576, 2022
Research article
19 Aug 2022
Research article | 19 Aug 2022

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

Pieter Vermeesch

Model code and software

simplex (1.0) Pieter Vermeesch

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.