Electrical and seismic tomography used to image the structure of a tailings pond at the abandoned Kettara mine, Morocco

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dc.contributor.author Lghoul, Meriem
dc.contributor.author Teixidó, Teresa
dc.contributor.author Peña, José Antonio
dc.contributor.author Hakkou, Rachid
dc.contributor.author Kchikach, Azzouz
dc.date.accessioned 2013-08-08T18:26:36Z
dc.date.available 2013-08-08T18:26:36Z
dc.date.copyright 2012
dc.date.issued 2012-03
dc.identifier.citation Meriem Lghoul, Teresa Teixidó, José Antonio Peña, Rachid Hakkou, Azzouz Kchikach, Roger Guérin, et al. (2012). Electrical and Seismic Tomography Used to Image the Structure of a Tailings Pond at the Abandoned Kettara Mine, Morocco. Mine Water and the Environment, 31(1), 53-61.doi:10.1007/s10230-012-0172-x en
dc.identifier.uri http://hdl.handle.net/10625/51483
dc.description.abstract The Kettara site (Morocco) is an abandoned pyrrhotite ore mine in a semi-arid environment. The site contains more than 3 million tons of mine waste that were deposited on the surface without concern for environmental consequences. Tailings were stockpiled in a pond, in a dyke, and in piles over an area of approximately 16 ha and have generated acid mine drainage (AMD) for more than 29 years. Geophysical methods have been used at the Kettara mine site to determine the nature of the geological substrate of the tailings pond, the internal structure of the mine wastes, and to investigate the pollution zones associated with sulphide waste dumps. Electrical resistivity tomography (ERT) and seismic refraction data were acquired, processed, and interpreted; the results from ERT and seismic refraction were complementary. A topographical survey of the tailings disposal area was also undertaken to estimate the volume of wastes and quantify the AMD process. Two-dimensional inverse models were used to investigate the geophysical data and indicated alteration zones at depth. It was determined that the material could be classified into three categories: tailings, with low resistivity (5–15 Ω m) and low velocity (500–1,800 m/s); altered, black shales, with intermediate resistivity (20–60 Ω m) and velocity (2,000–3,500 m/s), and; materials with high resistivity and velocity (>60 Ω m and >4,000 m/s, respectively), including unaltered shales associated with quartzite seams. The low-resistivity zone generates AMD, which migrates downward through fractures and micro-fractures. The substrate is composed of broken and altered shale, which facilitates AMD infiltration. en
dc.format Text en
dc.format.extent 1 digital file (p. 53-61) en
dc.format.mimetype application/pdf
dc.language.iso en
dc.publisher Springer en
dc.subject ACID MINE DRAINAGE en
dc.subject MINE WASTE en
dc.subject ELECTRICAL RESISTIVITY TOMOGRAPHY en
dc.subject KETTARA MINE SITE en
dc.subject SEISMIC REFRACTION TOMOGRAPHY en
dc.subject ENVIRONMENTAL DAMAGE en
dc.subject TOPOGRAPHY en
dc.title Electrical and seismic tomography used to image the structure of a tailings pond at the abandoned Kettara mine, Morocco en
dc.type Journal Article (peer-reviewed) en
idrc.project.number 104519
idrc.project.componentnumber 104519005
idrc.project.title International Research Chairs Initiative (IRCI) en
idrc.copyright.holder Springer-Verlag
idrc.dspace.access IDRC Only en
idrc.rims.adhocgroup IDRC SUPPORTED en
idrc.recordsserver.bcsnumber IC01-3412-150
idrc.noaccess Due to copyright restrictions the full text of this research output is not available in the IDRC Digital Library or by request from the IDRC Library. / Compte tenu des restrictions relatives au droit d'auteur, le texte intégral de cet extrant de recherche n'est pas accessible dans la Bibliothèque numérique du CRDI, et il n'est pas possible d'en faire la demande à la Bibliothéque du CRDI. en


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