Interplays Between Mantle Flow and Slab Pull at Subduction Zones in 3D

The understanding of the interactions between subduction-induced mantle flow and background (being global or regional) remains incomplete despite its potential impact on subduction dynamics associated deformation. Here we present results three-dimensional laboratory models zones at scale upper in which systematically vary plate's width trench perpendicular flow. In particular, test different magnitudes directions flow, evaluate their slab geometry vertical plane, shape evolution, superficial horizontal While chosen viscosity ratio convective subducting plate our (∼100) is favorable to deformation through displacement, show that plane only marginally affected by imposed Instead, has a larger kinematics trench. It reduces along-trench variations kinematics, turn decreases curvature, it largely disturbs pattern edges, inhibiting development toroidal cells. We also thickness layer (here, mantle) controls component length curvature for large zones.