Résumé
The Siberian Craton is one of the most renowned stable cratons in the world, and its lower crustal metamorphic evolution history is crucial for understanding continental dynamics. There has been an ongoing academic debate regarding the tectonic mechanisms responsible for the modification and reconstruction of the lower crust during the Paleoproterozoic, including vertical and horizontal tectonic accretion. This study focuses on the Paleoproterozoic granulite xenoliths from the Udachnaya kimberlite pipe in the Siberian Craton. Through petrographic observations, mineral chemistry analysis, various geological thermobarometers and P-T pseudosection modeling, we have constrained the P-T conditions of different metamorphic stages recorded in the granulites. In this study, three distinct metamorphic stages of the granulites are identified as: (1) the early prograde stage (M1), characterized by the mineral assemblage of garnet, clinopyroxene, plagioclase, rutile, and quartz inclusions, with P-T conditions of 740 simi