Skip to Main Content
Book Chapter

Geology of the northern Borborema Province, NE Brazil and its correlation with Nigeria, NW Africa

By
M. H. Arthaud
M. H. Arthaud
1
Departamento de Geologia
,
Universidade Federal do Ceará
,
CE
,
Brazil
(e-mail: michel.h@terra.com.br)
Search for other works by this author on:
R. Caby
R. Caby
2
Laboratoire de Tectonophysique, Université des Sciences et Techniques du Languedoc
,
Montpellier
,
France
Search for other works by this author on:
R. A. Fuck
R. A. Fuck
3
Instituto de Geociências, Universidade de Brasilia –
DF
,
Brazil
Search for other works by this author on:
E. L. Dantas
E. L. Dantas
3
Instituto de Geociências, Universidade de Brasilia –
DF
,
Brazil
Search for other works by this author on:
C. V. Parente
C. V. Parente
1
Departamento de Geologia
,
Universidade Federal do Ceará
,
CE
,
Brazil
(e-mail: michel.h@terra.com.br)
Search for other works by this author on:
Published:
January 01, 2008

Abstract

The Borborema and Benin–Nigeria provinces of NE Brazil and NW Africa, respectively, are key areas in the amalgamation of West Gondwana by continental collision during the Brasiliano/Pan-African orogenies. Both are underlain by complex basement: Nigeria has c. 3.05 Ga Archaean crust but no known Palaeoproterozoic rocks >2.0 Ga; in NE Brazil, 2.6–3.5 Ga Archaean rocks form small cores within Palaeoproterozoic gneiss terrains affected by plutonism at c. 2.17 Ga. Both regions exhibit Late Palaeoproterozoic (c. 1.8 Ga) rift-related magmatism and metasedimentary sequences overlying the basement. The Seridó Group of NE Brazil (<0.65 Ga) is similar to the Igarra Sequence in SW Nigeria. The Ceará Group, which may date back to c. 0.85 Ga, is a passive margin deposit on crust thinned during initiation of an oceanic domain. In both provinces, basement and sedimentary cover were involved in tangential tectonics that resulted in crust-thickening by nappe-stacking associated with closure of this ocean. Frontal collision between c. 0.66 and 0.60 Ga later evolved to an oblique collision, generating north–south continental strike-slip shear zones at c. 0.59 Ga. In NE Brazil, the main Pan-African suture is probably buried beneath the Parnaíba Basin. The Transbrasiliano Lineament, interpreted as the prolongation of the Kandi–4°50 Lineament in Hoggar, may represent a cryptic suture.

You do not currently have access to this article.

Figures & Tables

Contents

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
Search for other works by this author on:
R. A. J. Trouw
R. A. J. Trouw
Universidade Federale do Rio de Janeiro
Search for other works by this author on:
B. B. de Brito Neves
B. B. de Brito Neves
Universidade de São Paulo, Brazil
Search for other works by this author on:
M. J. de Wit
M. J. de Wit
University of Cape Town, South Africa
Search for other works by this author on:
Geological Society of London
Volume
294
ISBN electronic:
9781862395428
Publication date:
January 01, 2008

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal