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Abitibi greenstone belt
Greenstone belt that spans across the Ontario–Quebec border in Canada From Wikipedia, the free encyclopedia
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The Abitibi greenstone belt is a 2,800-to-2,600-million-year-old greenstone belt that spans across the Ontario–Quebec border in Canada.[1] It is mostly made of volcanic rocks, but also includes ultramafic rocks, mafic intrusions, granitoid rocks, and early and middle Precambrian sediments.[2]
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Geographical extent
The Abitibi greenstone belt is one of the world's largest Archean 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-old Blake River Megacaldera Complex is within the belt.
See also
References
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