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Benue Trough and Benue Chain

Published online by Cambridge University Press:  01 May 2009

J. Benkhelil
J. Benkhelil
Affiliation:
Département de Géologie, Université de Dakar, Dakar–Fann, Sénégal.
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Summary

It is suggested that the Benue Trough may have been initiated by the extension of the equatorial oceanic fracture zones onto the continent during the early stages of the separation of Africa and South America. A transcurrent movement along deep-seated faults of the basement is responsible for the structure of the trough. After a period of extension characterized by the sedimentary infilling of the trough and igneous activity, the trough is turned into a chain through a short phase of compression. A discrete pattern of ‘en echelon’ folds and the strain pattern deduced from the analysis of large scale and microfracturing correspond to a N–S to N160° E direction of compression coupled to a sinistral transcurrent movement along a NE–SW direction. The difference in age of the folding phase in the northern and southern parts of the chain indicates a diachronous nature for this tectonic event in relation to the wrench regime. The Tertiary evolution of the trough marked by a tensional regime resulting in an E–W extension is to be related to the Cameroon Volcanic Line.

Type
Articles
Information
Geological Magazine , Volume 119 , Issue 2 , March 1982 , pp. 155 - 168
Copyright
Copyright © Cambridge University Press 1982

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References

Ball, E. 1980. An example of very consistent brittle deformation over a wide intracontinental area: the Late Pan-African fracture system of the Tuareg and Nigerian Shield. Tectonophysics 61, 363–79.CrossRefGoogle Scholar
Benkhelil, J. & Guiraud, R. 1980. La Bénoué (Nigéria): une chaîne intracontinentale de style atlasique. C. r. Acad. Sc, Paris, 290, 1517Google Scholar
Bonhomme, M. 1962. Contribution à l'ètude géochronologique de la plate forme de l'Ouest africain. Ann. Fac Sci. Univ. Clermont, 5, 1–60.Google Scholar
Burke, K. C. 1969. Seismic areas of the Guinea Coast where Atlantic Fracture Zones reach Africa. Nature, Lond. 222, 655–7.Google Scholar
Burke, K. C., Dessauvagie, T. F. J. & Whiteman, A. J. 1970. Geological history of the Benue valley and adjacent areas. In African Geology (ed. Dessauvagie, T. F. J. and Whiteman, A. J.), pp. 187–205. Ibadan: Ibadan University Press.Google Scholar
Burke, K. C. & Dewey, J. F. 1974. Two plates in Africa during the Cretaceous? Nature, Lond. 249, 313–16.Google Scholar
Carter, J. D., Barber, W. & Tait, E. A. 1963. The Geology of Parts of Adamawa, Bauchi and Bornu Provinces in North-Eastern Nigeria. Bull. geol. Surv. Nigeria 30, 1–109.Google Scholar
Cratchley, C. R. & Jones, J. P. 1965. An interpretation of the geology and gravity anomalies of the Benue Valley, Nigeria. Overseas geol. Surv. Geophys. Paper 1, 1–26.Google Scholar
Delong, S. E., Dewey, J. F. & Fox, P. J. 1979. Topographic and geologic evolution of fracture zones. Jl geol. Soc. Lond. 136, 303–10.CrossRefGoogle Scholar
Donath, F. A. 1962. Role of layering in geologic deformation. Trans. N. Y. Acad. Sci. Ser. 24, 236–49.Google Scholar
Fail, J. P., Montadert, L., Delteil, J. R., Valery, P., Patriat, P. & Schlich, R. 1970. Prolongation des zones de fractures de l'océan Atlantique dans le golfe de Guinée. Earth Planet. Sci. Lett. 7, 413–19.CrossRefGoogle Scholar
Farrington, J. L. 1952. A preliminary description of the Nigerian lead-zinc field. Econ. Geol. 47, 583–608.Google Scholar
Grant, N. K. 1971. South Atlantic, Benue Trough and Gulf of Guinea Cretaceous triple junction. Bull. geol. Soc. Amer. 82, 2295–8.CrossRefGoogle Scholar
Guiraud, R. 1975. L'évolution post-triasique de l'avant-pays de la chaîne alpine en Algérie, d'aprés l'étude du bassin du Hodna et des régions voisines. Rev. Géogr. phys. Géol. dynam. XVII, 427–46.Google Scholar
Guiraud, R., Ousmane, B. & Robert, J. P. 1981. Mise en évidence de déformations traduisant un raccourcissement dans le Mésozoïque de la périphérie de l'Aïr (Niger), C. r. Acad. Sc, Paris, 292, 753–6.Google Scholar
Kennedy, W. Q. 1964. The structural differentiation of Africa in the Pan-African (± 500 million years) tectonic episode. 8th Ann. Rept. Res. Inst. Afr. Geol. Leeds Univ. 48–9.Google Scholar
King, L. C. 1950. Outline and disruption of Gondwanaland. Geol. Mag. 87, 353–9.CrossRefGoogle Scholar
Le Marechal, A. & Vincent, P. M. 1970. Le fossé crétacé du Sud-Adamaoua, Cameroun. In African Geology (ed. Dessauvagie, T. F. J. and Whiteman, A. J.), pp. 229–49. Ibadan: Ibadan University Press.Google Scholar
Louis, P. 1970. Contribution géophysique à la connaissance géologique du bassin du Lac Tchad. Mém. O.R.S.T.O.M., Paris, 42.Google Scholar
Mascle, J. 1976. Le Golfe de Guinée (Atlantique Sud): un exemple d'évolution de marges atlantiques en cisaillement. Mém. Soc. Geol. Fr. 128, 1–104.Google Scholar
Moody, J. D. 1973. Petroleum Exploration Aspect of Wrench–Fault Tectonics. Bull. Am. Ass. Petrol. Geol. 57, 449–76.Google Scholar
Murat, R. C. 1970. Stratigraphy and Palaeogeography of the Cretaceous and Lower Tertiary in Southern Nigeria. In African Geology (ed. Dessauvagie, T. F. J. and Whiteman, A. J.), pp. 251–76. Ibadan: Ibadan University Press.Google Scholar
Nwachukwu, S. O. 1972. The tectonic evolution of the southern portion of the Benue Trough, Nigeria. Geol. Mag. 109, 411–19.CrossRefGoogle Scholar
Offodile, M. E. & Reyment, R. A. 1976. Stratigraphy of the Keana–Awe area of the Middle Benue region of Nigeria. Bull. geol. Instn Univ. Upsala 7, 37–66.Google Scholar
Olade, M. A. 1978. Early Cretaceous basalt volcanism and initial continental rifting in Benue Trough, Nigeria. Nature Lond. 273, 458–9.CrossRefGoogle Scholar
Pinna, P., Magnien, A. P. & Ojo, O. M. 1980. Paleogeographical and structural evolution of north-eastern Benue Trough during Cretaceous (Gombe–Yola area, Nigeria). 26th Internal. Geol. Congr. Paris, Abstracts. 1, 374.Google Scholar
Reyment, R. A. 1965. Aspects of the Geology of Nigeria. Ibadan: Ibadan University Press.Google Scholar
Snelling, N. J. 1965. Overseas geol. Surv. Ann. Rept.for 1964. 101.Google Scholar
Stoneley, R. 1966. The Niger delta region in the light of the theory of continental drift. Geol. Mag. 103, 385–97.Google Scholar
Sutton, J. 1968. Development of the continental framework of the Atlantic. Proc. Geol. Ass. 79. 275–304.CrossRefGoogle Scholar
Thiessen, R., Burke, K. C. & Kidd, W. S. F. 1979. African hotspots and their relation to the underlying mantle. Geology 7, 263–6.Google Scholar
Thorpe, R. S. & Wright, J. B. 1979. Discussion of ‘Tectonic activity in West Africa and the Gulf of Guinea since Jurassic times – an explanation based on membrane tectonics’ by S. J. Freeth. Earth Planet. Sci. Lett. 42, 327–8.Google Scholar
Truswell, J. F. & Cope, R. N. 1963. The Geology of Parts of Niger and Zaria Provinces, Northern Nigeria. Bull. geol. Surv. Nigeria 29, 1–53.Google Scholar
Uzuakpunwa, A. B. 1974. The Abakaliki pyroclastics – Eastern Nigeria: new age and tectonic implications. Geol. Mag. 111, 65–70.CrossRefGoogle Scholar
Wilcox, R. E., Harding, T. P. & Seely, D. R. 1973. Basic Wrench Tectonics. Bull. Am. Ass. Petrol. Geol. 57, 74–96.Google Scholar
Wilson, R. C. L. & Williams, C. A. 1979. Oceanic transform structures and the development of Atlantic continental margin sedimentary basins – a review. Jl geol. Soc. Lond. 136, 311–20.Google Scholar
Wright, J. B. 1968. South Atlantic continental drift and the Benue Trough. Tectonophysics 6, 301–10.CrossRefGoogle Scholar
Wright, J. B. 1976. Fracture systems in Nigeria and initiation of fracture zones in the South Atlantic. Tectonophysics 34, 43–7.Google Scholar