Field-Trip Chronogram for the Pernambuco-Paraíba Basin

Transcrição

1 PERNAMBUCO-PARAÍBA BASIN (departure from Recife) Field-Trip Chronogram for the Pernambuco-Paraíba Basin DATE LOCALITY STOP 11/August Pedreira de Cimento Poty - Olinda/PE 30 12/August Pedreira de Cimento Nassau - Goiana/PE 28 Description of outcrops Stop 30 Quarry of Poty Cement (Votorantim Cement), next to Maria Farinha, Olinda/PE. Outcrop of the Cretaceous-Tertiary boundary; contact between the Gramame (Maastrichtian) and Maria Farinha formations (Albertão et al., 1994; Koutsoukos, 1996, 1998). Lithologically, there occurs a sequence of carbonate mudstones (calcilutites) intercalated with more argillaceous levels (marlstones). The base of the Maria Farinha Formation is marked by a bioclastic packstone of aproximately 50 cm of thickness. The sequence of these strata can be associated to climatic variations with alternation between rainier and drier periods and with storm cycles. The Cretaceous-Terciary boundary approximately corresponds to the contact between the Gramame abd Maria Farinha formations, and is marked by a discontinuity of 5 th or 6 th order.

2 Contact between the Gramame and Maria Farinha formations. K-T boundary. The quarry section of the Gramame Formation flooded by heavy rains.

3 The outcrops of the Maria Farinha Formation are represented by intercalations of calcilutites and marlstones, with bioturbation (Thalassinoides), interference waves, and fossils. Bioturbations (Thalassinoides) in loose limestone blocks of the Maria Farinha Formation.

4 Interference wave marks in the limestones of the Maria Farinha Formation. Fossil gastropodes in loose limestone blocks of the Maria Farinha Formation.

5 Following the profile in the direction of younger strata, three (3) samplings had been made, in the probable zones P1, P2 base and P2topo de Blow (1969), referring to the international foraminiferal zonation. General view of the mudstone carbonates and marlstones of the Maria Farinha Formation.

6 Nautilloid in the limestones of the Maria Farinha Formation. Stop 28 Quarry of Nassau Cement (Agro-Industrial Itapessoca S.A.), Island of Itapessoca, Goiana/PE. Outcrops of carbonate mudstones and marlstones interbedded of the Gramame Formation, Maastrichtian.

7 General view of the exploration quarry for the limestones of the Gramame Formation. NASSAU Quarry. Small cut-and-fill channel features in limestones of the Gramame Formation. NASSAU Quarry.

8 Reddish sediment cover of the Barreiras Formation overlying the carbonate sequence of the Gramame Formation

9 General view of the exploration levels of the Gramame Formation, with the rhythmic intercalation of carbonate mudstone and marlstone layers. NASSAU Quarry.

10 Calcite concretions of calcita dispersed in the carbonate mudstones of the Gramame Formation. NASSAU Quarry. Dispersed nodules of pirite/calcopirite in the carbonate mudstones of the Gramame Formation

11 References ALBERTÃO, G.A., KOUTSOUKOS, E.A.M., REGALI, M.P.S., ATTREP JR., M. & MARTINS JR., P.P., The Cretaceous-Tertiary boundary in southern low-latitude regions: preliminary study in Pernambuco, northeastern Brazil. TERRA Nova, Vol. 6, No. 4, pp ALMEIDA, F. F. M. (1996a). Divisão estratigráfica do Pré-Cambriano da plataforma brasileira. In: CONGRESSO BRASILEIRO DE GEOLOGIA, 23. Salvador. Anais... Salvador: (s/n). 52p. APOLUCENO, D.M. - Faciologia e sistemas deposicionais das formações Açu e Jandaíra, Cretáceo Superior da Bacia Potiguar, na região de Apodi, RN. Natal: UFRN/DEGEO, p. (Relatório de Graduação). APOLUCENO, D.M.; CÓRDOBA, V.C.; FARIAS, P.R.C. Faciologia e sistemas deposicionais da Formação Jandaíra, Bacia Potiguar, em uma área a Norte de Apodi, RN. In: Simpósio de Geologia do Nordeste, 16, Recife, Anais... Recife, SBG. p ARARIPE, P.T. & FEIJÓ, F.J. Bacia Potiguar. Rio de Janeiro, PETROBRÁS B. Geoci. PETROBRÁS. 8(1): Jan./mar BAGNOLI, E. Ilhas de barreira: Conceituação teórica e um exemplo do Recente (Ponta do Tubarão Litoral Norte do Estado do Rio Grande do Norte). Natal, PETROBRÁS/DEBAR/SELAB. 1988a. 20f. (Relatório Interno). BAGNOLI, E. - O Arenito Mossoró, Campo de Canto do Amaro, Cretáceo Superior da Bacia Potiguar, Brasil: Um exemplo de um reservatório de tidal inlet channel. In: SEMINÁRIO DE GEOLOGIA DE DESENVOLVIMENTO E RESERVATÓRIO, 3. Salvador, 1988b. Anais..., Salvador. PETROBRÁS/DEPEX, p BAGNOLI, E. & FARIAS, P.R.C. Excursão à Bacia Potiguar Emersa. Natal. PETROBRÁS/DEBAR f. (Relatório Interno). BAGNOLI, E. Uma seqüência de tidal bundles no topo da Formação Açu, Cretáceo Superior da Bacia Potiguar. In: CONGR. BRAS. GEOL., 37. São Paulo, Boletim de Resumos... São Paulo, SBG, p BAGNOLI, E. & FARIAS, P.R.C. Field trip guide to Potiguar Basin. In: INTERNATIONAL SEDIMENTOLOGICAL CONGRESS, 14. Recife, Roteiro de Campo... Recife, IAS. 44p. BAGNOLI, E.; FARIAS, P.R.C.; SPADINI, A.R.; CÓRDOBA,V.C. Diagnostic sedimentary structures in sandstones and limestones of the Upper Cretaceous of Potiguar Basin, Brazil. In: INTERNATIONAL SEDIMENTOLOGICAL CONGRESS, 14. Recife, Abstracts... Recife, IAS. p.a2-a3. BECKER, M.; CARRASCO, B.N.; BARRETO JÚNIOR, A.B.B.; RIBEIRO, C.A.F.; ASSIS, O.C.; FARIAS, P.R.C.; PREDA, W.. Projeto Geometria e heterogeneidades de reservatórios fluviais:

12 Formação Açu, Bacia Potiguar. Rio de Janeiro: PETROBRÁS/ DEPEX/CENPES/DEBAR f. (Relatório interno). BECKER, M. Sedimentologic architecture, permeability structure and fractal charactheristics of braided fluvial deposits, Cretaceous Açu Formation, Potiguar Basin, Northeastern Brazil. Austin: Texas University p. Tese (doutorado). CORDANI, U. G., SATO, K. (1999). Crustal evolution of the South American Platform, base don Nd isotopic sustematics on granitoid rocks. Episodes, 22 (3),