Special Online Talks As another successful GAC/AGC Lecture Tour series wraps up - we are pleased to invite you to join a special virtual presentation from our two award winning presenters. Mark your calendars and join us online.

Thursday April 3, 2 pm EST 2024 Howard Street Robinson Medalist Professor Ali Polat, University of Windsor The Mechanism of Archean Continental Growth: Evidence from Field Relationships, and Volcanic Rock and TTG Geochemistry Abstract: Prof. Ali Polat’s presentation addresses the ongoing debate surrounding the tectonic mechanisms behind Archean continental crust formation. By examining field relationships and extensive geochemical data from volcanic rocks and tonalite-trondhjemite-granodiorite suites (TTGs) in Archean terrains, the research suggests that subduction-related processes at convergent plate margins were the primary drivers of continental growth from 4.0 to 2.5 billion years ago. The data, consisting of over 8,200 volcanic rock and 3,500 TTG samples, reveals that these formations exhibit geochemical signatures typical of oceanic and continental arc environments.

Join us on Zoom, Thursday April 3, 2pm EST https://umanitoba.zoom.us/j/62719299168?pwd=xqTzUfwtrlwqfmEo RBjPOqFW03qr2T.1 Meeting ID: 627 1929 9168 Passcode: 209459

umanitoba.zoom.us