Resumo

BAKKALI, Saad  e  AMRANI, Mahacine. « DEBRUITAGE » D'UNE CARTE DE RESISTIVITÉ DES "DERANGEMENTS" DES PHOSPHATES MAROCAINS PAR ONDELETTE ANALYSANTE. Rev.EIA.Esc.Ing.Antioq [online]. 2007, n.7, pp.41-49. ISSN 1794-1237.

Resistivity surveys have been successfully used in the Oulad Abdoun phosphate basin. A Schlumber-ger resistivity survey over an area of 50 hectares was carried out. A new field procedure based on analytic signal response of resistivity data was tested to deal with the presence of phosphate deposit disturbances. A resistivity map was expected to allow the electrical resistivity signal to be imaged in 2D. 2D wavelet is standard tool in the interpretation of geophysical potential field data. Wavelet transform is particularly suitable in denoising, filtering and analyzing geophysical data singularities. Wavelet transform tools is applied to analysis of a Moroccan phosphate deposit "disturbances". Wavelet approach applied to modeling surface phosphate "disturbances" was found to be consistently useful.

Palavras-chave : resistivity; Schlumberger; phosphates; wavelet; denoising; Morocco.

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