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This paper presents a 2.5D gravimetric model generated from 315 new gravity stations obtained along a NW-SE 750 km geophysical transect in the northeastern portion of the Borborema Province, NE Brazil. The regional and residual components of the gravity field were modeled separately. Modeling of the regional anomalies revealed a crustal thickness variation from 28 to 32 km, considering the average densities of about 2.8 g/cm3 for the continental crust and 3.3 g/cm3 for lithospheric mantle. High frequency residual anomalies were interpreted on the density contrasts between a 10 km thick upper crust and a broad assembly of supracrustal covers and basement units, which show density values between 2.55 to 2.9 g/cm3. The current configuration of the Borborema Province lithosphere is clearly the result of the Mesozoic South American - African breakup of West Gondwana, which overprinted the Brasiliano-Pan African orogenic structures.

Contribuição de uma seção gravimétrica transversal ao estudo da estruturação litosférica na porção setentrional da Província Borborema, NE do Brasil