Partial retention of radiogenic Pb in galena nanocrystals explains discordance in monazite from Napier Complex (Antarctica)

• Published in: Earth and Planetary Science Letters
• Main Authors: Turuani, M.J., Laurent, A.T., Seydoux-Guillaume, A.-M., Fougerouse, D., Saxey, D., Reddy, S.M., Harley, S.L., Reynaud, S., Rickard, W.D.A.
• Other Authors: Université Jean Monnet - Saint-Étienne (UJM), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement Lyon (LGL-TPE), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Curtin University Perth, Planning and Transport Research Centre (PATREC), University of Edinburgh, Laboratoire Hubert Curien Saint Etienne (LHC), Institut d'Optique Graduate School (IOGS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2022
• Subjects: U–Th–Pb discordance; monazite; Pb mobility; nanogeochronology; atom probe tomography; [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry; Napier; Antarc*; Antarctica
• Online Access: https://hal.archives-ouvertes.fr/hal-03664891; https://hal.archives-ouvertes.fr/hal-03664891/document; https://hal.archives-ouvertes.fr/hal-03664891/file/Turuani_et_al_revised_Manuscript.pdf; https://doi.org/10.1016/j.epsl.2022.117567

International audience The discordance of U-Th-Pb isotopic systems in geochronometers, and how such data are interpreted, are still major issues in the geosciences. To better understand the disturbance of isotopic systems, and how this impacts the derivation of geologically-meaningful ages, previous...