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Category: Data

Description: We test the hypotheses that either Edge-Driven Convection (EDC) or mantle flow derived from mantle wind interactions with lithospheric topography is the dominant source of anisotropy beneath Madagascar. We, therefore, simulate two sets of mantle convection models using regional-scale 3D computational modeling. The main result of this study suggest that the dome nant control of the measured anisotropy may be from EDC. Our results also suggests that the asthenosphere beneath northern and southern Madagascar is dominated by dislocation creep. Dislocation creep rheology may be dominant in the upper asthenosphere beneath other regions of continental lithosphere. We provide the 3D regional mantle flow models (Edge-Driven Convection and Mantle Wind models) . The models are inside directories that are output from the software package ASPECT. The directories contain files that can be used to visualise model initial conditions and simulation results: temperature field, density, viscosity, velocity fields, strain rate, and viscosity diffusion creep and dislocation creep ratio. 1) "edge_driven_convection_madagascar.zip" is the Edge-Driven Convection model for Madagascar and surroundings using the updated Fishwick (2010) lithospheric model. 2)"mantle_wind_madagascar_behn_2004.zip" is the mantle wind model using the Behn et al. (2004) global mantle flow model as boundary condition. 3)"mantle_wind_madagascar_behn_2004.zip" is the mantle wind model using the Behn et al. (2004) global mantle flow model as boundary condition.