Petrogenetic insights into the largest volcanic pulse in the Archean Abitibi greenstone belt, Canada: the Stoughton-Roquemaure assemblage

Canadian Journal of Earth Sciences, Ahead of Print.The Stoughton-Roquemaure (S-R) assemblage represents the largest and most rapidly emplaced (∼3 m.y.) volcanic sequence within the Abitibi greenstone belt, yet much of its petrogenetic history remains unexplored. To address this, we compile 1319 whole-rock geochemical analyses, comprising 1.0% komatiites, 2.6% komatiitic basalts, 37.1% tholeiitic basalts, 0.5% tholeiitic intermediate volcanics, 8.1% medium-Th basalts, 19.1% high-Th basal