Multi-scale Analysis of Gravity Anomaly and Discussion of Deep Structure in the North Margin of South China Sea

Abstract

Abstract:

The gravity field contains the superimposition effect of heterogeneous bodies with different densities. In order to better analysis the information of the underground source reflected by gravity abnormity and the structure of the north marginal basins in South China Sea, this paper adopted the method of the two dimensional wavelet decomposition technique. Through resolving the gravity abnormity in the north marginal basins in South China Sea, and combining the topography and geomorphology of the study area, this paper discussed the basin structure and the geological characteristics of rock mass distribution. The results show that the fourth order transform approximation is mainly composed of the information of Moho undulations, and the wavelet transform details is mainly composed of the information of sedimentary base undulations. It is a better way to use wavelet multi-scale method to analysis the gravity anomaly.

Key words: wavelet transform, multiscale analysis, north margin of South China Sea, gravity anomaly

WU Yue, MENG Xiao-Gong, LIU Guo-Feng. Multi-scale Analysis of Gravity Anomaly and Discussion of Deep Structure in the North Margin of South China Sea[J]. Geoscience, 2012, 26(6): 1162-1167.

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Multi-scale Analysis of Gravity Anomaly and Discussion of Deep Structure in the North Margin of South China Sea

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