GEOLOGIA E EVOLUÇÃO DO SISTEMA DE BACIAS TAFROGÊNICAS CONTINENTAIS DO SUDESTE DO BRASIL

MÁRIO SÉRGIO DE MELO, CLÁUDIO RICCOMINI, YOCITERU HASUI, FERNANDO FLÁVIO MARQUES DE ALMEIDA, ARMANDO MÁRCIO COIMBRA

Resumo


The São Paulo, Taubaté, Resende and Volta Redonda basins are fil1ed by similar continental sedimentary sequences. These sequences include a basal rudaceous facies which grades to the top and laterally to a f1uviatil facies; only at the Taubaté basin a lower lacustrine facies is present. Palinologic and K-Ar datings of ankaramitic flows indicated the Upper Eocene age of the sequences. The basins are hemi-grabens and small faults cutting the sediments are observed. The normal, reverse and strike-slip faults may be related to a regional deformation system with principal NNW-SSE elongation, vertical shortening and ENE-WSW intermediate axis. This deformation may be related to a crustal extension regime or a horizontal dextral displacement. The development of the basins has been linked to the late stage of the Atlantic opening, but intraplate processes are not to be discarded.

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