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Recent mapping and geochronology (1989-1993) of a transect across the Ungava Peninsula in the 250,000 km² high-grade Minto block of the northeastern Superior Province reveal four domains of dominantly plutonic origin (west to east: Tikkerutuk, La Minto, Gouldia, Utsalik), forming northerly structural and aeromagnetic trends. The voluminous Leaf River granodiorite suite of 2.725 Ga age occurs in all domains and isotopically reflects derivation from sources 2.8-3.1 Ga that occur locally as tonalitic enclaves. The Gouldia domain, forming a central spine, contains significant 3.1-2.9 Ga tonalite and the Vizien greenstone belt, consisting of volcanic-sedimentary panels of 2.94, 2.80, 2.724 and c.2.718 …
