Fig. 14
From: Ancient slabs beneath Arctic and surroundings: Izanagi, Farallon, and in-betweens
Schematic diagram showing a possible mechanism of the division between Greenland and Canada and tearing of crust beneath the Canadian Arctic Archipelago revealed by this study. The subducting slab with oceanic ridge becomes stagnant below the 660-km discontinuity under Canada and Greenland. The red arrows indicate upwelling of hot asthenospheric materials due to convective circulation process in the Big Mantle Wedge. The blue arrows indicate subduction and divergence directions of the subducted slab. The white arrows on the surface indicate tectonic traction, whose length conceptually indicates the traction strength. BB = Baffin Bay; DS = Davis Strait; LS = Labrador Sea