Wavelet transform and its application to decomposition of gravity anomalies

Abstract

The gravity anomalies obtained by survey reflect the inhomogeneity of the lithosphere density. The gravity values are suitable to study the basements and structure of the earth. However, the gravity anomalies include the whole lithosphere and upper mantle, the decomposition of the gravity field is important to study. Based upon the theory of wavelet and multi-scale analysis, we studied the method of decomposition of gravity anomalies and then decomposed the gravity anomalies of China, East China Sea, etc. by using the two dimensional wavelet decomposition technique. Results show that the wavelet multiscale analysis is a powerful tool for decomposition of gravity anomalies.