GEMOC - Department of EPS - Faculty of Science

ComPbCorr is an Excel template which corrects U-Pb analyses of zircons or other minerals used in geochronology for common lead. The algoritm used does not require data for ²⁰⁴Pb, nor is ideal concordance assumed. The method is informally known as the "Discordance correction", because it uses the discorance pattern in U-Th-Pb isotope space to estimate the amout of common lead present.

The discordance correction method is designed for correction of quadrupole LAM-ICPMS data, or data from other methods which do not report ²⁰⁴Pb. If ²⁰⁴Pb has been measured, a traditional common-lead correction should be used.

A full description of the method is published in Chemical Geology (Andersen 2002), a PDF offprint of the paper can be downloaded from the website of the journal.

The template can be obtained by request to the author (mailto:tom.andersen@geologi.uio.no)