3D simulation results and animations of copper leaching, transport and deposition in sedimentary basins during the postrift stage according to Scenario 1 in Bahlali et al. (2025). Models are built using surface-based modelling approach (doi:10.1007/s11004-018-9764-8). Flow simulations are run with IC-FERST (multifluids.github.io), using unstructured tetrahedral meshes that adapt to geological heterogeneity and flow behaviour throughout the simulation to improve simulation quality and performance. Folder structure: Simulation: Contains 3D unstructured adaptive mesh output in .vtu format (openable with ParaView, www.paraview.org). Time interval between successive outputs is 50,000 years. Animations: Includes Supplementary Videos (SV) visualising - SV2: 3D view of salt transport over the postrift period (salinity in kg/kg) - SV3: Brine circulation and copper deposition over the postrift period - SV4: 3D view of Cu transport (rock Cu concentration in kg/kg) - SV5: 3D view of Cu transport (groundwater Cu concentration in kg/kg) - SV6: Top view of Cu mineralisation at the redox boundary (rock Cu concentration in kg/kg)