European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 35, issue 3
Articles | Volume 35, issue 3
https://doi.org/10.5194/ejm-35-383-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-35-383-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 35, issue 3
Research article
 | 
14 Jun 2023
Research article |  | 14 Jun 2023

Supergene phases from ferruginous duricrusts: non-destructive microsampling and mineralogy prior to (U–Th) ∕ He geochronological analysis

Karina P. P. Marques, Thierry Allard, Cécile Gautheron, Benoît Baptiste, Rosella Pinna-Jamme, Guillaume Morin, Ludovic Delbes, and Pablo Vidal-Torrado

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Short summary
We proposed a new non-destructive mineralogical methodology on sub-millimeter grains that allows us to quantify the hematite and goethite content and hematite / goethite ratio of grains prior to (U–Th) / He geochronological analysis. (U–Th) / He data performed on different aliquots with different acquisition times show no remarkable differences in age, opening a new way to investigate the (U–Th) / He data evolution in supergene lateritic duricrusts.
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