Submit your papersSubmit Now
For Enquiries: [email protected]
IIARD LogoIIARD

The Geology of Lafiyari And Environs, Part of Sheet 128 Kafin Madaki SE, Bauchi State, Nigeria

Abubakar Ahmed Maikudi, Ahmed Isah Haruna, Abdulmajid Isa Jibrin, Adamu, Mukhtar Hassan, Abdulbari Saleh Dandashire, Aisha Abdullahi Abubakar, Bashir, Sulaiman, Hadiza Haruna Jumare

Abstract

The study area lies within latitude 100 30’0” N to 100 34’ 48” N and longitude 90 53’46” E to 90 56’ 00” E, which covers about 46.88 km2. This work has as a pioneer study investigated the migmatite–pegmatite complex in the Lafiyari area, Field relationships shows the Pegmatites are intrusive into migmatites, indicating a genetic link. The migmatites show progressive partial melting from metatexite to diatexite. Basaltic dykes cross-cut all units, representing a later magmatic phase. Petrographically, the pegmatites and migmatites are dominated by quartz, K- feldspar (microcline), and plagioclase, with key accessory minerals including sillimanite, garnet, and myrmekite, indicating a high-grade metamorphism. The basaltic dykes consist of orthopyroxene, plagioclase, and opaque minerals. Structurally the emplacement of pegmatite dykes was structurally controlled, with a dominant NE-SW trend that aligns with the regional Pan- African structural grain. Therefore, the migmatites in this area are part of the migmatization processes linked to Pan African Orogeny.

References

Brown, M. (2001). Orogeny, migmatites and leucogranites: A review. Proceedings of the Indian Academy of Sciences – Earth and Planetary Sciences, 110(4), 313–336. https://doi.org/10.1007/BF02702898 Brown, M. (2013). Granite: From genesis to emplacement. Geological Society of America Bulletin, 125(7–8), 1079–1113. https://doi.org/10.1130/B30877.1 Bruguier, O., Dada, S., & Lancelot, J. R. (1994). Early Archean component (>3.5 Ga) within a 3.05 Ga orthogneiss from northern Nigeria: U–Pb zircon evidence. Earth and Planetary Science Letters, 125, 89–103. Černý, P., Blevin, L. P., Cuney, M., & London, D. (2005). Granite-related ore deposits. Economic Geology, 100(Anniversary Volume), 337–370. Clemens, J. D., & Vielzeuf, D. (1987). Constraints on melting and magma production in the crust. Earth and Planetary Science Letters, 86(2–4), 287–306. https://doi.org/10.1016/0012- 821X(87)90227-5 Dada, S. S., Birck, J. L., Lancelot, J. R., & Rahaman, M. A. (1993). Archaean migmatite gneiss complex of northcentral Nigeria: Its geochemistry, petrogenesis and evolution. International Colloquium on African Geology, 1, 97–102. Ferré, E. C., & Caby, R. (2007). Granulite facies metamorphism and charnockite plutonism: Examples from the Neoproterozoic belt of northern Nigeria. Proceedings of the Geologists' Association, 118(4), 387–397. https://doi.org/10.1016/s0016-7878(07)80046-0 Ferré, E. C., Caby, R., Peucat, J. J., Capdevila, R., & Monié, P. (1998). Pan-African, post- collisional, ferro-potassic granite and quartz–monzonite plutons of eastern Nigeria. Lithos, 45, 255–279. Ferré, E. C., Gleizes, G., Bouchez, J. L., & Nnabo, P. N. (1995). Internal fabric and strike-slip emplacement of the Pan-African granite of Solli Hills, northern Nigeria. Tectonics, 14, 1205–1219. Garba, I. (2003). Geochemical discrimination of newly discovered rare metal bearing and barren pegmatites in the Pan-African (600 +150 Ma) basement of northern Nigeria. Applied Earth Science, 112(3), 287–291. Holdaway, M. J. (1971). Stability of andalusite and the aluminum silicate phase diagram. American Journal of Science, 271(2), 97–131. https://doi.org/10.2475/ajs.271.2.97 London, D. (2005). Granitic pegmatites: An assessment of current concepts and directions for the future. Lithos, 80(1), 281–303. https://doi.org/10.1016/j.lithos.2004.02.009 Passchier, C. W., & Trouw, R. A. J. (2005). Microtectonics (2nd ed.). Springer. https://doi.org/10.1007/3-540-29359-0 Rosenberg, C. L., & Handy, M. R. (2005). Experimental deformation of partially melted granite revisited: Implications for the continental crust. Journal of Metamorphic Geology, 23(1), 19–28. https://doi.org/10.1111/j.1525-1314.2005.00555.x Sawyer, E. W. (2008). Atlas of migmatites (The Canadian Mineralogist Special Publication 9). Mineralogical Association of Canada. Shelley, D. (1993). Igneous and metamorphic rocks under the microscope: Classification, textures, microstructures and mineral preferred orientations. Chapman and Hall. Turner, D. C. (1983). Upper Proterozoic schist belts in the Nigerian sector of the Pan-African Province of West Africa. Precambrian Research, 21, 55–79. Vanderhaeghe, O., & Teyssier, C. (2001). Partial melting and flow of orogens. Tectonophysics, 342(3–4), 451–472. https://doi.org/10.1016/S0040-1951(01)00175-5 Vigneresse, J. L., Barbey, P., & Cuney, M. (1996). Rheological transitions during partial melting and crystallization with application to felsic magma segregation and transfer. Journal of Petrology, 37(6), 1579–1600. https://doi.org/10.1093/petrology/37.6.1579 Woakes, M., Rahaman, M. A., & Ajibade, A. C. (1987). Some metallogenetic features of the Nigerian basement. Journal of African Earth Sciences, 6(5), 655–664. https://doi.org/10.1016/0899-5362(87)90004-2 Wright, E. P. (1971). Basement complex. In Geological Survey of Nigeria (Ed.), The geology of the Jos Plateau (pp. 12–47). Geological Survey of Nigeria.