AB: 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....

Caratori Tontini, F.

Carmisciano, C.

Cocchi, L.

Stefanelli, P.

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2008 Joint Assembly          
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TI: Inversion of potential-field data for layers with uneven thickness
AU: * Caratori Tontini, F
EM: caratori@ingv.it
AF:  Istituto  Nazionale  di  Geofisica  e  Vulcanologia,  via  Pezzino  Basso,  2,
Fezzano, SP 19020, Italy
AU: Cocchi, L
EM: cocchi@ingv.it
AF:  Istituto  Nazionale  di  Geofisica  e  Vulcanologia,  via  Pezzino  Basso,  2,
Fezzano, SP 19020, Italy
AU: Carmisciano, C
EM: carmisciano@ingv.it
AF:  Istituto  Nazionale  di  Geofisica  e  Vulcanologia,  via  Pezzino  Basso,  2,
Fezzano, SP 19020, Italy
AU: Stefanelli, P
EM: stefanelli@ingv.it
AF:  Istituto  Nazionale  di  Geofisica  e  Vulcanologia,  via  Pezzino  Basso,  2,
Fezzano, SP 19020, Italy
AB:  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.  As  a
possible future improvement we show the implication for simultaneous inversion
of gravity data, both for density distribution and for bottom interface, under the
hypothesis of local compensation.
DE: 0903 Computational methods: potential fields (1214)
DE: 0920 Gravity methods (1219)
DE: 0925 Magnetic and electrical methods (5109)
DE: 3010 Gravity and isostasy (1218, 1222)
DE: 3260 Inverse theory
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2008 Joint Assembly
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Inversion of potential-field data for layers with uneven thickness http://www.agu.org/cgi-bin/SFgate/SFgate?language=English&verbos...
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Inversion of potential-field data for layers with uneven thickness

http://www.earth-prints.org/bitstream/2122/4920/1/AGU_2008_Presentation_Caratori.pdf

Inversion of potential-field data for layers with uneven thickness

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