Geography of The Northwest Territories - Geology

Geology

The Northwest Territories contains the Mackenzie dike swarm, which is the largest dike swarm known on Earth. At ca. 1.269-1.267 Ga, the Slave craton was partly uplifted and intruded by the giant Mackenzie dyke swarm, radiating from a mantle plume center west of Victoria Island. This is the last major event affecting the core of the Slave craton, although some younger mafic magmatic events affect its edges.