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EnglishSpectral analysis, based on Fourier Transform, provides a high-resolution analysis in frequency domain but it has not resolution in the space domain. In addition, the case of multiple sources is hard to be studied with standard techniques, such as that based on the well-known Spector and Grant's method. We propose to fix these issues by resorting to a scalogram analysis, obtained through the continuous wavelet transform of the potential fields using the Morlet analyzing wavelet. In the scalogram it is indeed possible distinguishing and locating the source contributes for both their space and scale contents. In this framework, we propose a method to analyze locally the scalogram, in bounded sub-regions, so to estimate the depth of each source by Bounded-Region Wavelet Spectra, which provide simultaneously a good space and scale resolution. We tested successfully this approach with magnetic anomalies of synthetic multiple-source models and we finally applied it to the gravimetric data of Sicily (Southern Italy), for estimating a gravity-based Moho depth in Sicily
| Titolo: | Bounded-Region Wavelet spectrum: A new tool for depth estimation of gravity and magnetic data | |
| Autori: | ||
| Data di pubblicazione: | 2018 | |
| Abstract: | Spectral analysis, based on Fourier Transform, provides a high-resolution analysis in frequency domain but it has not resolution in the space domain. In addition, the case of multiple sources is hard to be studied with standard techniques, such as that based on the well-known Spector and Grant's method. We propose to fix these issues by resorting to a scalogram analysis, obtained through the continuous wavelet transform of the potential fields using the Morlet analyzing wavelet. In the scalogram it is indeed possible distinguishing and locating the source contributes for both their space and scale contents. In this framework, we propose a method to analyze locally the scalogram, in bounded sub-regions, so to estimate the depth of each source by Bounded-Region Wavelet Spectra, which provide simultaneously a good space and scale resolution. We tested successfully this approach with magnetic anomalies of synthetic multiple-source models and we finally applied it to the gravimetric data of Sicily (Southern Italy), for estimating a gravity-based Moho depth in Sicily | |
| Handle: | http://hdl.handle.net/11588/746925 | |
| Appare nelle tipologie: | 4.2 Abstract in Atti di convegno |
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