The Matachewan dike swarm is a large 2,500 to 2,450 million year old Paleoproterozoic dike swarm of Northern Ontario, Canada. It consists of basaltic dikes that were intruded in greenschist, granite-greenstone, and metamorphosed sedimentary terrains of the Superior Craton of the Canadian Shield.Petrogenesis of basalts from the Archean Matachewan Dike Swarm Superior Province of Canada With an area of , the Matachewan dike swarm stands as a large igneous province.Igneous rock associations in Canada 3. Large Igneous Provinces (LIPs) in Canada and adjacent regions: 3 Ga to Present.
See also Matachewan hotspot
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