Potential-field inversion for a layer with uneven thickness: The Tyrrhenian Sea density model

Details Potential-field inversion for a layer with uneven thickness: The Tyrrhenian Sea density model Potential-field inversion for a layer with uneven thickness: The Tyrrhenian Sea density model

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pepi..166..105c&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 166, Issue 1-2, p. 105-111.

Physics

5

Magnetic Anomalies, Modeling And Interpretations, Gravity Methods, Magnetic And Electrical Methods, Gravity And Isostasy

Scientific paper

Inversion of large-scale potential-field anomalies, aimed at determining density or magnetization, is usually made in the Fourier domain. The commonly adopted geometry is based on a layer of constant thickness, characterized by a bottom surface at a fixed distance from the top surface. We propose a new method to overcome this limiting geometry, by inverting in the usual iterating scheme using top and bottom surfaces of differing, but known shapes. Randomly generated synthetic models will be analyzed, and finally performance of this method will be tested on real gravity data describing the isostatic residual anomaly of the Southern Tyrrhenian Sea in Italy. The final result is a density model that shows the distribution of the oceanic crust in this region, which is delimited by known structural elements and appears strongly correlated with the oceanized abyssal basins of Vavilov and Marsili.

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