Long-term repeatability and interlaboratory reproducibility of high-precision ID-TIMS U-Pb geochronology.

ABSTRACT: Age determination of minerals using the U-Pb technique is widely used to quantify time in Earth's history. A number of geochronology laboratories produce the highest precision U-Pb dates employing the EARTHTIME ²⁰²Pb-²⁰⁵Pb-²³³U-²³⁵U tracer solution for isotope dilution, and the EARTHTIME ET100 and ET2000 solutions for system calibration and laboratory intercalibration. Here, we report ET100 and ET2000 solution data from the geochronology laboratory of University of Geneva obtained between 2008 and 2021 and compare the most recent data with results from the geochronology laboratories of Princeton University and ETH Zürich. This compilation demonstrates that (i) the choice of the thermal ionization mass spectrometer model has no influence on precis

SUBMITTER: Schaltegger U 

PROVIDER: S-EPMC8262554 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature