European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 36, issue 3
Articles | Volume 36, issue 3
https://doi.org/10.5194/ejm-36-433-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-36-433-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 36, issue 3
Research article
 | 
03 Jun 2024
Research article |  | 03 Jun 2024

First in situ Lu–Hf garnet date for a lithium–caesium–tantalum (LCT) pegmatite from the Kietyönmäki Li deposit, Somero–Tammela pegmatite region, SW Finland

Krisztián Szentpéteri, Kathryn Cutts, Stijn Glorie, Hugh O'Brien, Sari Lukkari, Radoslaw M. Michallik, and Alan Butcher

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Latest update: 06 Nov 2025
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Short summary
In situ Lu–Hf geochronology of garnet is applied to date a Finnish lithium–caesium–tantalum (LCT) pegmatite from the Somero–Tammela pegmatite region. The age obtained was 1801 ± 53 Ma, which is consistent with zircon ages of 1815–1740 Ma obtained from the same pegmatite. We show the in situ Lu–Hf method is a fast way of obtaining reliable age dates from LCT pegmatites.
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