Abstract: The wavelet analysis is widely applied in geophysical data processing and interpretation for its multiple resolution analysis, and got very good results. The biorthogonal wavelet analysis was used as original basis of wavelet for high accuracy derivates calculation, which serves as important information of anomaly analyses and interpretation, and also as the basic data for further calculation as Euler deconvolution, analytic inversion and source parameters interpretation. Based on the wavelet coefficients, the Monte-Carlo method was applied to calculate the parameters of noise. The cases study from real data shows that the algorithm has high accuracy, and its results can help the geological mapping and strata study.

Key words: gravity and magnetic data, derivative processing, wavelet analysis, Monte-Carlo method