Seismic Discontinuities Across the North American Caribbean Plate Boundary From S‐to‐P Receiver Functions

The evolution of the Caribbean plate has resulted in formation volcanic arcs, Large Igneous Province (CLIP) and micro-plates across boundary zones. northern with North American been particularly segmented transition from oblique subduction to collision moving east west. However, there are few constraints on seismic structure upper mantle boundary. Here we use S-to-P receiver functions map velocity discontinuities boundary, placing crustal lithospheric thicknesses, as well structures associated collision. We image a increase depth, consistently seen at 28–34 ± 4 km along which corresponds Moho. A second strong depth is observed depths 64–66 5 km, related presence subducting slabs anisotropic effects. decrease 95–135 7 reflects lithosphere-asthenosphere that varies deepest negative discontinuity spatially maps CLIP. suggest deep melting 135 an elevated potential temperature 1585 20°C during CLIP formation, caused depleted dehydrated root base melting, thus thickening lithosphere.