Web: https://halifax2022.atlanticgeosciencesociety.ca/
Includes the following sessions:
SS-05 Cratons, cratonic magmatism and diamonds
Convenors: Yana Fedortchouk (yana@dal.ca), Maya Kopylova (mkopylova@eoas.ubc.ca), Andrew Schaeffer (andrew.schaeffer@canada.ca)
Cratons are the oldest and most tectonically stable parts of the continental lithosphere. They are home to some of the most exotic magmas on Earth including kimberlites, lamproites, and carbonatites, in addition to hosting primary diamond deposits. Methodological advances in seismic tomography studies of cratons improved our understanding of the structure and extent of cratonic mantle roots and crust as well as craton evolution. We combine geophysical information on cratons with new petrological, geochemical and geochronological data on tectonic evolution of the crust and the origin of mantle domains. Cratonic magmatism, from Archean komatiites and basalts, kimberlites and related ultramafic alkaline volcanics, provide a rich source of information on the timescales of mantle and deep crust processes. Studies of mantle-derived xenoliths, diamonds and their inclusions as well as mantle melting experiments further improve our understanding of the cratonic mantle and its modification. The session welcomes contributions across all these different fields of cratonic studies, which advance our understanding of craton formation and stabilization, mantle metasomatism and diamond formation, origin and triggers of diverse crustal and mantle magmatism and studies advancing diamond exploration techniques.