Resumo

SAAD, Bakkali  e  MAHACINE, Amrani. DENOISING RESISTIVITY PHOSPHATE "DISTURBANCES" USING HAAR MOTHER WAVELET TRANSFORM (SIDI CHENNANE, MOROCCO). Earth Sci. Res. J. [online]. 2008, vol.12, n.1, pp.62-71. ISSN 1794-6190.

Wavelet transforms originated in geophysics in the early 1980s for the analysis of seismic signals. Since then, significant mathematical advances in wavelet theory have enabled a suite of applications in diverse fields. In geophysics, the power of wavelets for analysis of non stationary processes that contain multiscale features, detection of singularities, analysis of transient phenomena, fractal and multifractal processes, and signal compression is now being exploited for the study of several processes including resistivity surveys. The present paper deals with denoising Moroccan phosphate "disturbances" resistivity data? map using the Haar wavelet mother transform method. The results show a significant suppression of noise and a very good smoothing and recovery of resistivity anomalies.

Palavras-chave : resistivity; phosphate; disturbance; Haar; wavelet; Sidi Chennane; Morocco.

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