Targa, Débora Andrade [UNESP]Moreira, César Augusto [UNESP]Casagrande, Matheus Felipe Stanfoca [UNESP]2022-04-282022-04-282021-09-01Mine Water and the Environment, v. 40, n. 3, p. 671-689, 2021.1616-10681025-9112http://hdl.handle.net/11449/221782A hydrogeological analysis was conducted of aquifer systems within a sulfide-rich tailings pile and underlying rocks at a uranium mine to understand the generation and transport of AMD. A geophysical investigation was carried out along seven transects spaced 30 m apart using electrical resistivity tomography and a Wenner-Schlumberger array. The results were used as input to 2D and pseudo-3D models of resistivity and chargeability parameters. The geophysical results and models contrasted unaffected saturated zones and zones impacted by AMD, in addition to three areas within the tailings with a high sulfide content. The tailings and underlying fractured bedrock aquifer are hydrologically connected, which promotes the exchange of mine-influenced water into the regional aquifer. Releases from the site’s tailings and other wastes can severely affect regional groundwater.671-689engAcid mine drainageBrazilChargeabilityElectrical resistivity tomographyArtigo10.1007/s10230-021-00791-12-s2.0-85107966496