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The Abitibi-Opatica terrane is defined to include the Abitibi granite-greenstone Subprovince and the Opatica granite-gneiss domain in southeastern Superior Province, Canada. We combine the geological, structural, geochronological, and geochemical knowledge base for the region, with new geochemical data for suites of granitic rocks, in order to establish a testable model for the geodynamic setting and the tectonomagmatic evolution of the Late Archean crust. The geochemistry of TTG orthogneiss and plutons are correlated, petrogenetically and temporally, with the published data and interpretations for the volcanic stratigraphy. The geochemistry of later granodiorite plutons is correlated with the crustal melting signatures of the...

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