Resolution of U-Th-Pb isotope systems perturbations at the nanoscale in monazite from ultra-high temperature contexts (Antarctica, Madagascar, India)

• Main Author: Turuani, Marion
• Other Authors: Laboratoire Magmas et Volcans (LMV), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), Université de Lyon, Anne-Magali Seydoux-Guillaume, Simon L. Harley
• Format: Doctoral or Postdoctoral Thesis
• Language: French
• Published: HAL CCSD 2022
• Subjects: Geochronology; U-Th-Pb systems; Isotope disruption; Monazite; Tomographic atom probe; Transmission electron microscope; Géochronologie; Systèmes U-Th-Pb; Perturbation isotopique; Sonde atomique tomographique; Microscope électronique en transmission; [SDU.STU]Sciences of the Universe [physics]/Earth Sciences; Napier; Antarc*; Antarctica; Antarctique*
• Online Access: https://theses.hal.science/tel-04019471; https://theses.hal.science/tel-04019471/document; https://theses.hal.science/tel-04019471/file/These-Turuani-Marion-2022.pdf

This thesis focuses on the behavior of the mineral monazite (LREEPO4) which is used in geosciences for dating planetary events. This mineral integrates U and Th in its crystal lattice, which decay to Pb by radioactive decay over time. By measuring the isotopic compositions in U, Th and Pb in monazit...