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Book Chapter

Proterozoic links between the Borborema Province, NE Brazil, and the Central African Fold Belt

By
W. R. Van Schmus
W. R. Van Schmus
1
Department of Geology
,
University of Kansas
,
Lawrence, Kansas, 66045
USA
(e-mail: rvschmus@ku.edu)
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E. P. Oliveira
E. P. Oliveira
2
Instituto Geociências, UNICAMP
,
Campinas, 13083-970
Brazil
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A. F. Da Silva Filho
A. F. Da Silva Filho
3
Departamento de Geologia
,
Universidade Federal de Pernambuco
,
50739 Recife
,
Brazil
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S. F. Toteu
S. F. Toteu
4
Centre de Recherches Géologiques et Minières, BP 333, Garoua
,
Cameroon
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J. Penaye
J. Penaye
4
Centre de Recherches Géologiques et Minières, BP 333, Garoua
,
Cameroon
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I. P. Guimarães
I. P. Guimarães
3
Departamento de Geologia
,
Universidade Federal de Pernambuco
,
50739 Recife
,
Brazil
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Published:
January 01, 2008

Abstract

The Congo (CC) and the São Francisco (SFC) cratons were joined at about 2.05 Ga; northern parts of Palaeoproterozoic basement subsequently underwent extension at about 1 Ga, forming intracratonic basins. Neoproterozoic metasedimentary rocks in these basins yield detrital zircons as young as 630 Ma. The Brasiliano and Pan-African (c. 620–580 Ma) assembly of West Gondwana extensively altered this system. The Sergipano domain occurs north of the SFC, and the comparable Yaoundé domain occurs north of the CC. Crust north of the Sergipano domain comprises the Pernambuco–Alagoas (PEAL) domain. The NE–SW-striking Tcholliré–Banyo fault in Cameroon may extend southwestwards between the PEAL and Sergipano domains, defining northern limits of abundant SFC/CC basement. The Adamawa–Yadé domain in Africa does not appear to extend into Brazil. The Transverse domain of Brazil is a collage of Palaeoproterozoic crustal blocks, the 1.0 Ga Cariris Velhos orogen (CVO), late Neoproterozoic basins, and Brasiliano granites. The CVO extends ENE for more than 700 km in Brazil, but eastern continuation into Africa has not been identified. North of the Transverse domain contiguous c. 2.15 Ga gneisses comprise basement of Rio Grande do Norte and Ceará domains, which continue eastwards into western Nigeria and western Sahara.

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Geological Society, London, Special Publications

West Gondwana: Pre-Cenozoic Correlations Across the South Atlantic Region

R. J. Pankhurst
R. J. Pankhurst
British Geological Survey, UK
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R. A. J. Trouw
R. A. J. Trouw
Universidade Federale do Rio de Janeiro
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B. B. de Brito Neves
B. B. de Brito Neves
Universidade de São Paulo, Brazil
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M. J. de Wit
M. J. de Wit
University of Cape Town, South Africa
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Geological Society of London
Volume
294
ISBN electronic:
9781862395428
Publication date:
January 01, 2008

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