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PETROLOGY AND GEOCHRONOLOGY OF IWO POTASSIC SYENITE

A. Adetunji

First published: 2011-06-20https://doi.org/10.5593/sgem2011/s01.129View metrics

Abstract

Detailed petrographic studies, whole rock geochemistry and in situ U-Pb geochronology of syenite from Iwo area of the southwestern Nigeria has been performed. The results indicate that the syenite is metaaluminous belonging to the calc-alkaline magmatic series whose parental melt was derived fr om melting of the upper mantle/lower crustal source. Precise U-Pb dating of zircons is done by LA-ICP-MS and age of 625 В± 6.1 Ma is obtained. The field and petrological i nvestigations show that the syenite was emplaced syn-kinematically while the Pan-African tecton o-thermal deformation was still active.

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Publication details

Title
PETROLOGY AND GEOCHRONOLOGY OF IWO POTASSIC SYENITE
Authors
A. Adetunji
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference
Publisher
Stef92 Technology
Year
2011
Pages
Not available yet
ISSN
1314-2704
ISBN
Not available yet
Language
en
Publication type
Conference Paper
Keywords
potassic syenitegeochronologySouthwestern Nigeria
References7

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  5. Petters, S.S., Petters, S.W. (1991) Regi onal geology of Africa: Lecture notes in Earth Science 40, Springer Verlag, p.722.

  6. Affaton, P., Rahaman, M.A., Trompetts, R. and Sougy, J. (1991). The Dahomeyide orogen: tectonothermal evolution and relations hips with the Volta basin. In: Dallmeyer, R.D. and Lecorche, J.F. (eds.), The West African Orogens and Circum Atlantic Correlatives. IUGS/UNESCO project 233, Springer Berling, Heidelberg, New York, pp. 107-122.

  7. Caby, R., Bertrand, J.M. and Black, R., 1981. Pan-African ocean closure and continental collision in the Hoggar-Iforasse gment, Central Sahara. In: A. Kroner (Editor), Precambrian Plate Tectonics. Elsevier, Amsterdam, pp.407-434.

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