Autor(es): Targa, Débora Andrade [UNESP] ; Moreira, César Augusto [UNESP] ; Casagrande, Matheus Felipe Stanfoca [UNESP]
Data: 2022
Identificador Persistente: http://hdl.handle.net/11449/221782
Origem: Oasisbr
Assunto(s): Acid mine drainage; Brazil; Chargeability; Electrical resistivity tomography; Acid mine drainage; Acid mine drainage; Brazil; Brazil; Chargeability; Chargeability; Electrical resistivity tomography; Electrical resistivity tomography
Made available in DSpace on 2022-04-28T19:40:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-09-01
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
A 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.
Geosciences and Exact Sciences Institute (IGCE) São Paulo State University, 24-A Avenue, 1515, Bela Vista
Geosciences and Exact Sciences Institute (IGCE) São Paulo State University, 24-A Avenue, 1515, Bela Vista
FAPESP: 2019/14563-3
