The Geodynamic Context of the Cenozoic Volcanism of the Cap-Vert Peninsula (Senegal)


The Cenozoic alkaline volcanism of the Senegalo-Mauritania sedimentary basin presents an episodic long-lasting volcanic activity from the Eocene-Oligocene boundary up to the Quaternary. Two volcanic episodes are usually distinguished on stratigraphical grounds: a Miocene one and a Quaternary one separated by a period of quiescence of several million years corresponding to the main phase of lateritic weathering. The Tertiary lavas are highly silica-undersaturated alkaline rocks ranging from nephelinites to basanites. They contain nepheline and fassaite-type clinopyroxene in their mineralogy. The Quaternary lavas are more evolved with Hy-normative in comparison to the Tertiary ones; they are composed of basanites and medium to coarser-grained dolerites. The distribution of the REE and other incompatible elements are typical of alkaline lavas with generally strong LREE enrichment without significant Eu anomaly. The Cenozoic Cap-Vert lavas have OIB (oceanic islands basalts)-affinities as shown by their relatively radiogenic Nd and unradiogenic Sr characters closed to the HIMU-OIB. This suggests a HIMU-type end member in the magma sources which is fairly comparable to those erupted in the Canaries and Cape Verde archipelagoes during the same period.

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Ndiaye, A. and Ngom, P. (2014) The Geodynamic Context of the Cenozoic Volcanism of the Cap-Vert Peninsula (Senegal). International Journal of Geosciences, 5, 1521-1539. doi: 10.4236/ijg.2014.512124.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Meagher, L.J., Ruffman, A. and Steward, W. (1977) Contribution a la geophysique du plateau continental du Senegal et de la Gambie. Afrique de l’Ouest. Baffin, 38-40.
[2] Chautard, J. (1907) Les roches eruptives de la presqu’ile du Cap Vert (Senegal). Bull. Soc. Geol. Fr., 424-440.
[3] Combier, M. (1935) Carte Geologique de Dakar (notice explicative). Bull. Com. Et. Hist. Et Sc. AOF, serie B, n°1.
[4] Bellion, Y. and Crevola, G. (1991) Cretaceous and Cainozoic Magmatism of the Senegal Basin (West Africa): A Review. In: Kampunzu, A.B. and Lubala, R.T., Eds., Magmatism in Extensional Structural Settings: The Phanerozoic African Plat, Springler Verlag, Berlin, 189-208.
[5] Guiraud R., Bellion Y., Benkhelil J. and Moreau C. (1987) Post-Hercynian Tectonics in Northern and Western Africa. Journal of Geology, 22, 433-466.
[6] Crevola, G., Cantagrel, G.M. and Moreau, C. (1994) Le volcanisme cenozoique de la presqu’ile du Cap-Vert (Senegal): Cadre chronologique et geodynamique. Bull. Soc. Geol. Fr., t. 165, 437-446.
[7] Rocchi, S., Mazotti, A., Morroni, M., Pandolfi, P., Giusepp, B., di Biase, D., Federici, F. and Lo, P.G. (2007) Detection of Miocene Saucer-Shaped Sills (Offshore Senegal) via Integrated Interpretation of Seismic, Magnetic, and Gravimetric Data.Terra Nova, 19, 232-239.
[8] Hansen, D.M., Redfern, J., Federici, F., di Biase, D. and Guiseppe, B. (2008) Miocene Igneous Activity in the Northern Sub-Basin, Offshore Senegal, NW Africa. Marine and Petroleum Geology, 25, 1-15.
[9] Lo, P.G., Dia, A. and Kampunzu, A.B. (199) Cenozoic Volcanism in the Western Senegal and Its Relationship to the Opening of the Central Atlantic Ocean. Tectonophysics, 209, 281-291.
[10] Mellet, O. (1993) Etude des mecanismes de mise en place et de la petrogenese du volcano-sedimentaire quaternaire de la presqu’ile du Cap-Vert (Senegal occidental). Mem. DEA Geosciences, INPL, Nancy, 135.
[11] Bellion, Y. (1987) Histoire geodynamique post-paleozoique des bassins d’Afrique de l’Ouest. These Etat, University of Avignon, Avignon, 306 p.
[12] de Spengler, A., Castelain, J., Cauvin, J. and Leroy, M. (1966) Le bassin Secondaire-Tertiaire du Senegal. In: par Reyre, D., Ed., Bassins sedimentaires du littoral africain, 1ere partie: Littoral Atlantique, Association des Services Geologiques Africaines, Paris, 80-94.
[13] Ligier, J.L. (1980) Structure profonde du basin cotier senegalo-mauritanien. Interpretation des donnees gravimetriques et magnetiques. These 3eme cycle, Trav. Lab. Sci. Terre, Marseille, B, 116, 158 p.
[14] Ritz, M., Bellion, Y. and Flicoteaux, R. (1987) Magnetelluric Soundings and the Geological Structure and Tectonics of the Senegalo-Mauritanian Basin in the Northern Senegal, West Africa. Tectonics, 6, 395-409.
[15] Bertrand, H. (1991) The Mesozoic Tholeiitic Province of Northwest Africa: A Volcano-Tectonic Record of the Early Opening of Central Atlantic. In: Kampunzu, A.B. and Lubala, R.T., Eds., Magmatism in Extensional Structural Settings: The Phanerozoic African Plate, Springler Verlag, Berlin, 147-188.
[16] Seibold, E. and Hinz, K. (1974) Continental Slope Construction and Destruction, West Africa. In: Burk, C.A. and Drake, C.L., Eds, The Geology of Continental Margins, Springer Verlag, Berlin, 179-196.
[17] Gomez, R. and Barusseau, J.P. (1984) Dispositions des formations post-eocenes de la marge continentale senegalaise. Bulletin de la Societe Geologique de France, 26, 1107-1116.
[18] Lompo, M. (1987) Methodes et etude de la fracturation et des filons. Exemple de la region du Cap-Vert (Senegal). Memoire de Diplome d’Etudes Approfondies (D.E.A), Dakar, 59 p.
[19] Crevola, G. (1978) Sills, dykes, et pipes de tufs volcaniques brechiques fluidifies dans la presqu’ile du Cap-Vert (Senegal). Comptes Rendus Sommaires de la Societe Geologique de France, 3, 135-139.
[20] Gorodiski, A. (1952) Notice explicative de la carte geologique du Senegal a 1/20000 (feuilles Ouakam et Dakar). Bulletin de la Direction des Mines de l’Afrique Occidentale Francaise (AOF) (Dakar), 10, 5-57.
[21] Bellion, Y. and Guiraud, R. (1984) Le bassin sedimentaire du Senegal. Synthese des connaissances actuelles. In: Bureau des Recherches Geologiques et Minieres (BRGM) et Direction des Mines et de la Geologie (DMG), Dakar, Eds., Plan mineral de la republique du Senegal, Dakar, 4-63.
[22] Ndiaye, A. (2002) Etude lithologique et petrographique des coulees de laves quaternaires de la presqu’ile du Cap-Vert (Senegal). Mem. DEA Fac., Sciences et Techniques Univ. Ch. A. DIOP, Dakar.
[23] Carignan, J., Hild, P., Mevelle, G., Morel, J. and Yeghicheyan, D. (2001) Routine Analyses of Trace Elements in Geological Samples Using Flow Injection and Low Pressure On-Line Liquid Chromatography Coupled to ICP-MS: A Study of Reference Materials BR, DR-N, UB-N, AN-G and GH. Geostandards Newsletter, 25, 187-198.
[24] Pin, C., Briot, D., Bassin, C. and Poitrasson, F. (1994) Concomitant Separation of Strontium and Samarium-Neodymium for Isotopic Analysis in Silicates Samples, Based on Specific Extraction Chromatography. Analytica Chimica Acta, 298, 209-217.
[25] Cox, K.G., Bell, J.D. and Pankhurst, R.J. (1979) The Interpretation of Igneous Rocks. George Allen & Unwin, London, 450 p.
[26] Weaver, B.L. (1991) The Origin of Ocean Island Basalt End-Member Compositions: Trace Element and Isotopic Constraints. Earth and Planetary Science Letters, 104, 381-397.
[27] Combier, M. (1952) Note sur les pegmatitoides de Goree et de l’Ile aux Serpents. Dakar, Bulletin de la Direction des Mines de l’Afrique Occidentale Francaise (AOF), 10, 55-108.
[28] Crevola, G. (1975) Le volcanisme tertiaire et quaternaire de la presqu’ile du Cap-Vert (Senegal). Bulletin de l’Association pour l'Avancement des Sciences Naturelles au Senegal (AASNS), 40, 19-39.
[29] Loughnan, F.C. (1969) Chemical Weathering of the Silicate Minerals. Elsevier, New York.
[30] Wright, T.L. (1984) Origin of Hawaiian Tholeiite: A Metasomatic Model. Journal of Geophysical Research, 89, 3233-3252.
[31] Tatsumi, Y., Hamilton, D.L. and Nesbitt, R.W. (1986) Chemical Characteristics of Fluids Phase Released from a Subducted Lithosphere and Origin of Arc Magmas: Evidence from High Pressure Experiments ad Natural Rocks. Journal of Volcanology and Geothermal Research, 29, 293-309.
[32] Sun, S.S. and McDonough, W.F. (1989) Chemical and Isotopic Systematics of Oceanic Basalts: Implications for Mantle Compositions and Processes. In: Saunders, A.D. and Norry, M.J., Eds., Magmatism in the Oceanic Basins, Geological Society, Special Publications, London, 42, 313-345.
[33] Hamilton, D.L., Bedson, P. and Esson, J. (1989) The Behaviour of Trace Elements in the Evolution of Carbonatites. In: Bell, K., Ed., Carbonatites: Genesis and Evolution, Unwin Hyman, Boston, 405-427.
[34] Dostal, J., Zhi, X.C., Muehlenbachs, K., Dupuy, C. and Zhai, M.Z. (1991) Geochemistry of Cenozoic Alkali Lavas from Shandong Province, Eastern China. Geochemical Journal, 25, 1-16.
[35] Bonadiman, C., Beccaluva, L., Coltorti, M. and Siena, F. (2005) Kimberlite-Like Metasomatism and “Garnet Signature” in Spinel-Peridotite Xenoliths from Sal, Cape Verde Archipelago: Relics of a Subcontinental Mantle Domain within the Atlantic Ocean Lithosphere? Journal of Petrology, 46, 2465-2493.
[36] Martins, S., Mata, J., Munhá, J., Mendes, M.H., Maerschalk, C., Caldeira, R. and Mattielli, N. (2010) Chemical and Mineralogical Evidence of the Occurrence of Mantle Metasomatism by Carbonate-Rich Melts in an Oceanic Environment (Santiago Island, Cape Verde). Mineralogy and Petrology, 99, 43-65.
[37] Chauvel, C. and White, W.M. (1998) Geochimie isotopique du volcanisme oceanique actuel. Identification des grands domaines mantelliques sources. In: Hagemann et Treuil, Eds., Introduction a la Geochimie et ses Applications, CEA, Manson T.1, Chap. 5, 269-286.
[38] Torres, P., Silva, L.C., Munha, J., Caldeira, L., Mata, J. and Tassinari, C. (2010) Petrology and Geochemistry of Lavas from Sal Island: Implications for the Variability of the Cape Verde Magmatism. Cominucacoes Geologicas, 97, 35-62.
[39] Hofmann, A.W., Jochum, K.P., Seufert, M. and White, W.M. (1986) Nb and Pb in Oceanic Basalts: New Constraints on Mantle Evolution. Earth and Planetary Science Letters, 79, 33-45.
[40] Sarr, R., Ndiaye, P.M., Niang-Diop, I. and Gueye, M. (2000) Datation par les foraminiferes planctoniques d’une activite volcanique d’age Lutetien a Toubab Dialao (Senegal occidental). Bulletin de la Societe Geologique de France, 171, 197-205.
[41] Michell, J.G., Le Bas, M.J., Zielonka, J. and Furnes, H. (1983) On Dating the Magmatism of Maio, Cape Verde Islands. Earth and Planetary Science Letters, 64, 61-76.
[42] Plesner, S., Holm, P.M. and Wilson, J.R. (2002) 40Ar-39Ar Geochronology of Santo Antao, Cape Verde Islands. Journal of Volcanology and Geothermal Research, 120, 103-121.
[43] Holm, P.M., Wilson, J.R., Christensen, B.P., Hansen, L., Hansen, S.L., Hein, K.M., Mortensen, A.K., Pedersen, R., Plesner, S. and Runge, M.K. (2006) Sampling the Cape Verde Mantle Plume: Evolution of the Melt Compositions on Santo Antao, Cape Verde Islands. Journal of Petrology, 47, 145-189.
[44] Hoernle, K., Tilton, G. and Schmincke, H.U. (1991) Sr-Nd-Pb Isotopic Evolution of Gran Canaria: Evidence for Shallow Enriched Mantle beneath the Canary Islands. Earth and Planetary Science Letters, 106, 44-63.
[45] Carracedo, J.C., Day, S., Guillou, H., Rodriguez Badiola, E., Canas, J.A. and Perez Torrado, F.J. (1998) Hotspot Volcanism Close to a Passive Continental Margin: The Canary Islands. Geological Magazine, 135, 591-604.
[46] De Paepe, P., Klerkx, J., Hertogen, J. and Plinke, P. (1974) Oceanic Tholeiites on the Cape Verde Islands: Petrochemical and Geochemical Evidence. Earth and Planetary Science Letters, 22, 347-354.
[47] Arana, V. and Ortiz, R. (1991) The Canary Islands: Tectonics, Magmatism and Geodynamic Framework. In: Kampunzu, A.B. and Lubala, R.T., Eds., Magmatism in Extentional Structural Settings (The Phanerozoic African Plate), Springer-Verlag, Barcelone, 209-563.
[48] Lundstrom, C.C., Hoernle, K. and Gill, J. (2003) U-Series Disequilibria in Volcanic Rocks from the Canary Islands: Plume versus Lithospheric Melting. Geochimica et Cosmochimica Acta, 67, 4153-4177.
[49] Oyarzun, R., Doblas, M., Lopez-Ruiz, J. and Cebra, J.M. (1997) Opening of the Central Atlantic and Asymmetric Mantle Upwelling Phenomena: Implications for Long-Lived Magmatism in Western North Africa and Europe. Geology, 25, 727-730.<0727:OOTCAA>2.3.CO;2

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