Environmental Impact Assessment of the Subsurface in a Former W-Sn Mine: Integration of Geophysical Methodologies

Associated with the exploitation of metallic minerals in Europe during 20th century, several mining areas were abandoned without adequate environmental intervention. Furthermore, these lack studies to characterize impact pollution on hydrogeological system. The area surrounding tungsten mine Regoufe, northern Portugal, is one such exploited Second World War. accumulation sulfide-rich tailings may have caused an acid drainage (AMD), where leaching processes by seepage water led soil contamination, evidenced its character and anomalous concentrations some Potentially Toxic Elements (PTE) reported previous studies. present research proposes innovative approach that seeks integration different geophysical techniques activity subsurface. Electrical resistivity (ER) electromagnetic (EM) used measure subsurface electrical properties. In addition, seismic refraction Multichannel Analysis Surface Waves (MASW) performed geometry, depth, geomechanical behavior rock bodies. allowed interpretation sections a 3D volume gain insight into distribution potentially contaminating fluids material valley.