Statistics – Computation
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29b..16f&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 2, pp. 16-1, CiteID 1029, DOI 10.1029/2001GL013866
Statistics
Computation
6
Exploration Geophysics: Computational Methods, Seismic, Exploration Geophysics: Gravity Methods, Exploration Geophysics: Magnetic And Electrical Methods
Scientific paper
Potential fields generally require to be analyzed by different scales, owning to sources of different depth and extent. Fourier or wavelet filtering not always yield an optimal separation of those different source effects, often introducing some amount of distortion. We propose therefore a new method, the Multiscale Derivative Analysis (MDA), based on the ``Enhanced Horizontal Derivative'' (EHD) of the field, which does not imply any separation of the effects, but simply enhances those related to a given scale. Such process, based on a weighted sum of increasing order derivatives of the field, converges quickly toward the actual boundaries of the sources. MDA applied to gravity data of the of Thyrrenian Sea (Italia) yields 3 maps of structural lineaments, each one characterized by a different scale. Known, partially known or relatively new structures are described in the maps, allowing a rapid analysis of all the ``gravity-related'' structural lineaments of this region.
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