Accurately, determination of the location for the anomaly sources and their properties played an important role in the potential field inverse problems. In recent years, the continuous wavelet transform (CWT) has been applied to estimate the horizontal location and the depth of the sources. In this paper, a new mother wavelet for effective analysis the properties of the potential field sources was introduced. By theoretical modeling, using the wavelet transform modulus maxima (WTMM) method, we set up a correlative function between the scale parameter and magnetic source depth. After verifying the reliability of the proposed method on the modeling data, we have analysed the magnetic data in the Mekong Delta. The results of this interpretation were consistency with previously published results, but the level of resolution for this technique was quite coincidental with other methods using different geological data.