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Crust structure in SE Brazil: inversion by genetic algorithm of surface waves and receiver functions

Grant number: 00/07134-2
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): December 01, 2000
Effective date (End): September 30, 2004
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geophysics
Principal Investigator:Marcelo Sousa de Assumpção
Grantee:Meijian An
Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil


The crust and upper mantle structure in SE Brazil will be studied by joint inversion of surface-wave dispersion and receiver function. Good quality seismological data have been collected in SE Brazil since 1992 by occupying about 20 sites with broadband high gain stations. The areas to be studied in detail include the Southern part of the São Francisco craton and surrounding fold belt, the NE part of the Ribeira belt, and the central part of the Paraná basin. The data to be inverted are interstation group and phase velocities of surface waves and Ps (Moho P to S conversion) arrival times. Genetic Algorithm inversion techniques will be used to infer the crustal and upper mantle structure in terms of P- and S- wave velocity profiles as well as the density profile. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ASSUMPÇÃO‚ M.; AN‚ M.; BIANCHI‚ M.; FRANÇA‚ G.S.L.; ROCHA‚ M.; BARBOSA‚ J.R.; BERROCAL‚ J.. Seismic studies of the Brasília fold belt at the western border of the São Francisco Craton‚ Central Brazil‚ using receiver function‚ surface-wave dispersion and teleseismic tomography. TECTONOPHYSICS, v. 388, n. 1, p. 173-185, . (96/01566-0, 00/07134-2)

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