Book ChapterDOI
The Dahomeyide Orogen: Tectonothermal Evolution and Relationships with the Volta Basin
P. Affaton,M. A. Rahaman,Roland Trompette,J. Sougy +3 more
- pp 107-122
TLDR
The Dahomeyide orogen is located along the southeastern margin of the West African craton, and is exposed throughout eastern Ghana, Togo, Benin, Nigeria and Cameroon as discussed by the authors.Abstract:
The Dahomeyide orogen is located along the southeastern margin of the West African craton, and is exposed throughout eastern Ghana, Togo, Benin, Nigeria and Cameroon (Fig. 1). The West African craton has remained tectnically stable since ca. 2000 Ma (Black 1985 a, b; Camil 1984). Western sectors of the craton are characterized by an Archean domain represented by grey gneisses and migmatitic complexes (amphibolite and granulite metamorphic facies), acid to basic granulites and charnockitic complexes, together with subordinate greenstone rocks, supracrustal metasedimentary and metavolcanoclastic rocks and granites. These rocks were affected by orogenic events at ca. 3000 Ma (Leonian) and ca. 2800 Ma (Liberian). Southeasternmost segments of the Archean domain were partially remobilized at ca. 1800 Ma during Eburnean orogenesis. Western sectors of this domain were variably affected by late Proterozoic (Pan-African) orogenic events.read more
Citations
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Journal ArticleDOI
Pan-African tectonic evolution in central and southern Cameroon: transpression and transtension during sinistral shear movements
TL;DR: In this paper, a kinematic analysis of the central Cameroon shear zone (CCSZ) and its Sanaga fault relay, indicate early sinistral shear movement (phase D2) that was later followed by a dextral sheer movement during the Pan-African orogeny, and the correlation of tectonic events among the CCSZs, thrusting of the Yaounde Group and the deformation in the Lom Group indicate a diachronous deposition history of these groups, where the sedimentary and magmatic rocks of
Journal ArticleDOI
The boundaries of the West African craton, with special reference to the basement of the Moroccan metacratonic Anti-Atlas belt
Nasser Ennih,Jean-Paul Liégeois +1 more
TL;DR: The West African craton (WAC) was constructed during the Archaean and the c. 2 Ga Palaeoproterozoic Eburnian orogeny as mentioned in this paper.
Journal ArticleDOI
Pan-African tectonics in northwestern Cameroon: Implication for the history of western Gondwana
TL;DR: In this article, three main tectonic events related to Pan-African collision and post-collision evolution have been identified in Cameroon: crustal thickening, left lateral wrench movements and right lateral wrench movement, successively.
Journal ArticleDOI
Structure, evolution and palaeogeography of the West African craton and bordering belts during the Neoproterozoic
TL;DR: In this paper, four palaeogeological schemes illustrating four key periods of the Neoproterozoic evolution of the West African craton have been proposed to connect the sedimentary environments and the tectonics events that occurred around the craton.
Journal ArticleDOI
Pan-African tectonic evolution and glacial events registered in Neoproterozoic to Cambrian cratonic and foreland basins of West Africa
TL;DR: In this article, the authors describe the Neoproterozoic-Cambrian lithostratigraphic successions occurring on the West African craton and in the surrounding Pan-African fold belts, with special reference to glacial or glacially influenced deposits.
References
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Book
The Geochronology and Evolution of Africa
L. Cahen,N. J. Snelling +1 more
TL;DR: An integrated continent-wide survey of the geology and geochronology of Africa, giving a balanced view of the history of the continent and the tectono-thermal events that have affected it throughout Precambrian time and into the Phanerozoic is presented in this paper.
Journal ArticleDOI
Origin and evolution of the late Precambrian high-grade Yaoundé gneisses (Cameroon)
TL;DR: The Yaounde series is composed of low to high-grade garnet-bearing schists and gneisses belonging to the Pan-African North-equatorial fold belt as discussed by the authors.
Journal ArticleDOI
Evidence for late Precambrian plate tectonics in West Africa
R. Black,Renaud Caby,A. Moussine-Pouchkine,R. Bayer,J. M. Bertrand,A. M. Boullier,J. Fabre,A. Lesquer +7 more
TL;DR: In the Gourma and Iforas regions (Mali) rifting occurred around 800-850 Myr ago along the eastern margin of the West African craton with a triple point in Mali, interpreted as an aulacogen as discussed by the authors, the suture is marked by a string of positive gravity anomalies corresponding to the emplacement of ultrabasic and basic rocks including perhaps ophiolites.
Book ChapterDOI
Chapter 16 Pan-African Ocean Closure and Continental Collision in the Hoggar-Iforas Segment, Central Sahara
R. Caby,J.M.L. Bertrand,R. Black +2 more
TL;DR: The late Precambrian to early Palaeozoic tectonic development of the Hoggar-Iforas region in the central Sahara is interpreted in terms of a complete Wilson cycle with ocean opening and closing between the West African craton and the Touareg shield as discussed by the authors.