Articles | Volume 3, issue 1
https://doi.org/10.5194/gchron-3-123-2021
https://doi.org/10.5194/gchron-3-123-2021
Research article
 | 
09 Mar 2021
Research article |  | 09 Mar 2021

U − Pb geochronology of epidote by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) as a tool for dating hydrothermal-vein formation

Veronica Peverelli, Tanya Ewing, Daniela Rubatto, Martin Wille, Alfons Berger, Igor Maria Villa, Pierre Lanari, Thomas Pettke, and Marco Herwegh

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Latest update: 19 Apr 2024
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Short summary
This work presents LA-ICP-MS U–Pb geochronology of epidote in hydrothermal veins. The challenges of epidote dating are addressed, and a protocol is proposed allowing us to obtain epidote U–Pb ages with a precision as good as 5 % in addition to the initial Pb isotopic composition of the epidote-forming fluid. Epidote demonstrates its potential to be used as a U–Pb geochronometer and as a fluid tracer, allowing us to reconstruct the timing of hydrothermal activity and the origin of the fluid(s).