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Locations of Abitibi and its surrounding subprovinces and the Grenville Province within the Canadian Shield.

As we had seen earlier, the Abitibi subprovince was the largest building block of the newly created juvenile crust. Geochemical data indicate that it derived directly from the Late Archean mantle. It is a young greenstone belt (relative to the others) displaying "juvenile" magmatism (extruding "original" magma, i.e. not remelted former rock).

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