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Pure and Applied Geophysics

, Volume 166, Issue 3, pp 375–408 | Cite as

Systematic Methodology for Velocity-dependent Gravity Modelling of Density Crustal Cross-Sections, using an Optimization Procedure

  • Lech Krysiński
Article

Abstract

The paper describes a new method of gravity modelling of the density cross section along a DSS profile. We propose a systematic procedure of gravity interpretation using structural information contained both in the velocity distribution of the seismic model and the geometry of its layers. The procedure is based on the optimisation of the density parameters of the model. The values of the parameters are limited by relationships between the seismic velocity and the density (optimisation with inequalities). The formulation of the method allows for discussion of the presence of isostasy and the distribution of compensating masses. The discussion is very important for the considered crust-lithosphere system. The presented calculations are done for one Carpathian profile (CEL01). The analysis of the properties of the fitting procedure provides the characteristic depth of subcrustal compensating density structures, the position of crucial tectonic boundaries along the profiles, locations of the crustal areas having exceptional lithology, the regional density differences of subcrustal matter and the estimation of regional deviations from the isostatic equilibrium.

Keywords

Gravity modelling optimisation with inequalities isostasy density boundary Carpathians 

Abbreviations

EEC

East-European Craton

Alc.

Alcapa Unit

PKB

position of Pieniny Klippen Belt

CLF

Cracow Lubliniec Fault

HCF

Holy Cross Fault

KF

Kock Fault

CB and CB’

boundaries of the intrusion at the edge of EEC

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Copyright information

© Birkhäuser Verlag, Basel 2009

Authors and Affiliations

  1. 1.Institute of GeophysicsUniversity of WarsawWarsawPoland

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