Keffi pegmatites area which contains numerous mineralised and non-mineralised pegmatites lie between the Wamba pegmatite field to the NE and Nasarawa pegmatite field to the SW on the North Central Pegmatite belt of Nigeria. In Keffi area exploitation of deposits is currently being done by small scale miners, whose activities are haphazard and uncoordinated, because of that information on the geology and petrology that will enable a systematic study of the pegmatites in the area is scanty. Systematic geochemical investigations of the pegmatites and surrounding host rocks aimed at establishing petrogenetic relationships amongst the various rock types in the area were conducted. Major, trace and REE investigations of the pegmatites and associated granitoids have indicated petrogenetic relationships amongst the pegmatites and between the pegmatites and surrounding granitoids of Keffi area. Also, the variation diagram of major, trace and REE in whole rocks and K-feldspar samples show patterns which categorised the pegmatites of Keffi area into; (1) Non-mineralised, (2) intermediate and (3) mineralised pegmatites. It was also deduced from the geochemical characteristics (variation diagrams in major and trace element, REE geochemistry and tectonic environment classification) that a genetic model based on the evolution of melt by partial melting of metasedimentary protolith during ultrametamorphic and deformational activities (anatexis) is proposed for the granite-pegmatite system of Keffi area. This information will be useful as guide for fruitful exploration of the pegmatites and serves as model for the exploitation of pegmatite veins in similar geologic settings.
R. Jacobson, and J. S. Webb, “The Pegmatite of Central Nigeria”, Geological Survey of Nigeria Bulletin, Vol. 17, 61pp. 1946.
A. I. Ginsburg, I. N. Timofeyev, and L. G. Feldman, Principles of Geology of the Granitic Pegmatites, Nedra, Moscow, Russia, pp296. 1979.
P. Cerny “Petrogenesis of Granitic Pegmatites, In Mineralogical Association of Canada, Short Course Handbook, No Granitic Pegmatite in Science and Industry, pp. 405–461., 1982a.
G. B Morgan VI,. and D. London, “Alteration of Amphibolitic Wall rocks Around the Tanco Rare-Element Pegmatite”, Bernic Lake Manitoba, Am. Mineral., Vol. 72, pp. 1097-1121. 1987,
D. Kuster, “Rare-Metal Pegmatites of Wamba, Central Nigeria-their Formation in Relationship to Late Pan-African Granites”, Mineral Deposita, Vol. 25, pp. 25-33. 1990.
P. Cerny “Rare-Element Granitic Pegmatites, Part I: Anatomy and Internal Evolution of Pegmatite Deposits”, Geoscience Can., Vol. 18, pp. 49-67. 1991a.
D. London, “The Application of Experimental Petrology to the Genesis and Crystallisation of Granitic Pegmatites”, Can. Mineral, Vol. 30, pp. 499-540. 1992.
P. Cerny., T. S. Ercit, and P. T. Vanstone “Petrology and Mineralisation of the Tanco Rare-Element Pegmatite, Souheastern Manitoba-Field Trip Guidebook A4, Geol. Ass. Can. Annual Meeting, Winnipeg Manitoba, 1996, 63pp.
A. A. Beus “Distribution of Tantalum and Niobium in Muscovites of Granitic Pegmatites” Geokhimiya, No.10. pp. 1216-1220. 1966.
O. D., Staurove, S. Stolyarov, and E. I. Isochewa, “Geochemistry Origin of Verkh Iset Granitoid Massif in Central Ural”, Geochem. Intern. Vol. 6, pp. 1138-1146. 1969.
V. V. Gordiyenko “Concentration of Li, Rb and Cs in Potash Feldspar and Muscovites as Criteria for Assessing the Rare Metal Mineralisation in Granite Pegmatites”, Internal Geol. Review, No. 13, pp. 134-142, 1971.
J. J. Norton, J. A. Redden, “Relations of Zonned Pegmatites to Other Pegmatites, Granites and Metamorphic Rocks in the Southern Black Hills”, South Dakota, American Mineralogist, Vol. 75, pp. 631-655. 1990.
C. K., Shearer, J. J., Papike, B. L. Jolliff, “Petrogenetic Links among Granites and Pegmatites”, In the Harney Peak Rare-Element Granite-Pegmatite System, Black Hills, South Dakota, Can. Mineral., Vol. 30, pp. 785-809. 1992.
A. M. R. Neiva, and J. M. F. Ramos, “Geochemistry of Granitic Aplite Pegmatite Sills and Petrogenetic Links with Granites, Guarda-Belmonte Area”, Central Portugal, pp. 837-854. 2010.
J. A. Kinnaird, “Contrasting Styles of Sn-Nb-Ta-Zn Mineralisation in Nigeria”, J. Afr Earth. Sci., Vol. 2, No. 2, pp. 81 – 90.1984.
K. C. Burke and J. F. Dewey, “Orogeny in Africa.” In: Dessauvagie, T.F.J. and Whiteman, A. J. (Eds.), African Geology, University of Ibadan Press, Ibadan, pp. 583 – 608, (1972).
R. Caby, J. M. L Brand, and R. Black, “Pan-African Ocean Closure and continental Collision in the Hoggar Iforas Segmen Central Sahara”, in Precambrian Tectonics”, Edited by a Kroner, Elsevier Amsterdam, pp 407 – 434. 1981.
P. Mc Curry “The Geology of the Precambrian to Lower Paleozoic Rocks of Northern Nigeria- A Review”, Geology of Nig, Elizabethan Publ. Co., Lagos,1976, pp.15-40.
M. A. Rahaman, “Review of Basement Geology of Southern Nigeria, In Kogbe”, C. A. (Eds.), Geol. Nigeria Elizabethan, Lagos, Nigeria, 1976, pp. 41-58.
J. B. Wright, “Fracture Systems in Nigeria and Initiation of Fracture Zones in the South Atlantic”, Tectonophysics, Vol. 34, pp. 743- 747. 1976.
R. Black, “Precambrian of West Africa”, Episodes, No. 4, pp. 3-8. 1980.
S. S. Dada, “Proterozoic Evolution of Nigeria”, In: The Basement Complex of Nigeria and its Mineral Resources (Oshin O. ed.), A Symposium organized to mark the 60th birthday of Prof. M. A. O. Rahaman, held at the Conference Centre, Obafemi Awolowo University, Ile – Ife, Nigeria, May 6th 2006, pp. 29-44.
H. A. Jones and, R. D. Hockey “The Geology of Part of South Western Nigeria”, Geol. Surv. Nigeria Bull. No. 31, 101pp. 1964.
M. A. Rahaman, “Recent Advances in the Study of the Basement Complex of Nigeria”, Precambrian Geol. Nigeria, Geol. Surv. Nig. Pub., pp. 324-327. 1988.
A.I. Akintola, P.R. Ikhan, O.A. Okunnlola, G.O. Akinttola and O.O. Oyebolu “Compositional features of precambrain pegmatites of Ago-Iwoye area South Western Nigeria. Journal of ecology and natural environment, Vol. 4(3). pp 71/87. 2011.
D. C. Turner, “Upper Proterozoic Schist Belts in the Nigerian Sector of the Pan-African Province of West Africa” Precambr. Res., Vol. 21, pp. 55 -79. 1983.
I.Y., Tanko, M. Adam and P.D. Dambring, “Mode of Emplacement of The pegmatites of Keffi Area, North Central Nigeria”. International Journal of Scientific 7 Technology Research, Vol. 4, Issue 4. Pp 214-229. 2015.
I. Garba “Geochemical discrimination of Newly Discovered Rare Metal Bearing and Barren Pegmatites in the Pan Afican 600 ± 150 Ma Basement of Northern Nigeria”, Applied Earth Science Transaction Institute of Mining and Metallurgy, No. 13, Vol. 112, pp. 287-292. 2003.
P. Cerny “Rare-Element Granitc Pegmatites, Part II: Regional to Global Environments and Petrogenesis”, Geoscience Can., Vol. 18, pp. 68-81. 1991b.
R. F. Martin, and C. De Vito, “The Patterns of Enrichment in Felsic Pegmatites Ultimately Depend on Tectonic Setting”, Can. Mineral, Vol. 43, pp. 2027-2048. 2005.
D. London “Granitic Pegmatites, an Assessment of Current Concepts and Directions for the Future”, Lithos, Vol. 8, pp. 281-303., 2005.
K. G.Cox, G. D. Bell, and R. J. Pankhurst, “The Interpretation of Igneous Rocks, George, Allen and Unwen, London. 1979, pp20-36.
J. A., Pearce, N. B. W., Harris, A. G. Tindle, “Trace Element Discrimination Diagram for the Tectonic Interpretation of Granitic Rocks”, Journal of Petrology, Vol. 22, pp. 956-983. 1984.
M. A. Peacock, and M. C. Bandy, “Ungemachite and Clino-Ungemachite, New Minerals from Chile”, Am. Mineral., Vol. 23, pp. 314-328. 1984.
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