Insights Into Exhumation and Mantle Hydration Processes at the Deep Galicia Margin From a 3D High‐Resolution Seismic Velocity Model

High-resolution velocity models developed using full-waveform inversion (FWI) can image fine details of the nature and structure subsurface. Using a 3D FWI model hyper-thinned crust at Deep Galicia Margin (DGM) west Iberia, we constrain this margin by comparing its with those in other similar tectonic settings. Velocities representative both upper lower continental are present, but there is no clear evidence for distinct crustal layers within crust. Our supports exhumation under footwalls fault blocks to accommodate extension. We used our generate serpentinization map uppermost mantle DGM, depth 100 ms (∼340 m) below S-reflector, low-angle detachment that marks base margin. find good alignment between serpentinized areas overlying major block bounding faults on map, suggesting played an important role transporting water mantle. Further, observe weak correlation heaves beneath hanging-wall blocks, indicating was controlled complex faulting during rifting. A match topographic highs S local highly suggests morphology affected volume-increasing process deformation