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, Denis, Saxey, David, Reddy, Steven, Harley, S.L., Reynaud, S., Rickard, William
• Format: Article in Journal/Newspaper
• Language: English
• Published: ELSEVIER 2022
• Subjects: Science & Technology; Physical Sciences; Geochemistry & Geophysics; U-Th-Pb discordance; monazite; Pb mobility; nanogeochronology; atom probe tomography; ATOM-PROBE; EAST ANTARCTICA; UHT METAMORPHISM; ZIRCON; GEOCHRONOLOGY; NANOSPHERES; SYSTEMATICS; XENOTIME; LEAD; ROCK; East Antarctica; Napier; Antarc*; Antarctica
• Online Access: https://hdl.handle.net/20.500.11937/90058; https://doi.org/10.1016/j.epsl.2022.117567

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, previously studied discordant m...