Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1548
AuthorsCarrozzo, M. T.* 
Balia, R.* 
Loddo, M.* 
Luzio, D.* 
Margiotta, C.* 
Quarta, T.* 
Trudu, R.* 
TitleGravity modelling of the lower crust in Sardinia (Italy)
Issue DateOct-1997
Series/Report no.40/5
URIhttp://hdl.handle.net/2122/1548
Keywordsgravity
seismic
spectral analysis
filtering
modelling
Subject Classification04. Solid Earth::04.02. Exploration geophysics::04.02.02. Gravity methods 
AbstractIn this paper an example is given of an application of statistical techniques to the Bouguer anomalies analysis in order to design a simple crustal model using few a priori assumptions. All gravity measurements carried out in Sardinia have been collected and processed. The Bouguer anomalies have been calculated according to local density estimates. Spectral analysis of the Bouguer anomalies has been carried out along selected profiles in order to estimate the mean depth of the Moho discontinuity and that of an infracrustal discontinuity. The use of this technique inferred the presence of a discontinuity at a mean depth of ~ 28 km, interpreted as Moho and the likely presence of an infracrustal discontinuity at a mean depth of ~18 km, interpreted as the upper-lower crust transition. In order to roughly reconstruct the shape of these interfaces, 2D inversion techniques were applied to the large wavelength components of the Bouguer anomalies, relative to profiles oriented along the E-W direction, extracted from low-pass filtered Bouguer anomaly maps. The density model obtained is compatible with some velocity models achieved from the interpretation of the seismic refraction profiles carried out within the European Geotraverse project.
Appears in Collections:Annals of Geophysics

Files in This Item:
File Description SizeFormat 
10 carrozzo.pdf3.38 MBAdobe PDFView/Open
Show full item record

Page view(s)

72
Last Week
0
Last month
checked on Jun 25, 2017

Download(s)

100
checked on Jun 25, 2017

Google ScholarTM

Check