Wikipedia

Abitibi greenstone belt

Canadian Shield

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]

Geographical extent

The Abitibi greenstone belt is one of the world's largest Archean greenstone belts. It represents a series of thrusted 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

  • Abitibi gold belt
  • List of greenstone belts
  • Volcanism of Canada
  • Volcanism of Eastern Canada

References

  1. ^ Cater, D.F. (1991). "Macassa Mine Geology". Society of Economic Geologists. Archean Gold Deposits of the Matachewan-Kirkland Lake-Larder Lake Area, Ontario, Canada (Guidebook Series Vol. II): 9–10.
  2. ^ Archean greenstone belt Retrieved on 2007-09-26


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