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TheAbitibi greenstone belt is a 2,800-to-2,600-million-year-oldgreenstone belt that spans across theOntario–Quebec border inCanada.[1] It is mostly made ofvolcanic rocks, but also includesultramafic rocks,maficintrusions,granitoid rocks, and early and middlePrecambrian sediments.[2]
The Abitibi greenstone belt is one of the world's largestArchean greenstone belts. It represents a series of subterranes that exhibit similar geological, geochemical, and isotopical signatures similar to those formed during the evolution of paired active-arc-back-arc systems. The huge 2,707-to-2,696-million-year-oldBlake River Megacaldera Complex is within the belt.
