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Nickel mineral systems within an evolving Archean Craton

34th International Geological Congress (Abstract)

T. Campbell McCUAIG, Steven J. Barnes, Sandra ROMANO, Nicolas Thebaud, Michael DOUBLIER, Marco L. FIORENTINI, Kevin F. CASSIDY, Elena A. BELOUSOVA, David R. MOLE, Chris L. KIRKLAND

Nickel mineral systems in the Archean Yilgarn Craton of Western Australia are hosted by komatiites which cluster in space and time. At ~2.9 Ga, komatiite-hosted nickel systems are concentrated in the southern Youanmi Terrane, whereas at 2.7 Ga deposits are primarily located in the Kalgoorlie Terrane. This study investigated whether lithospheric architecture, constrained using Sm-Nd and Lu-Hf isotopes from granites and felsic volcanics, controlled the localisation of komatiitic magmas.