Structural and Petrologic Studies of Bumaji Area, Southeastern Nigeria

Structural and Petrologic Studies of Bumaji Area, Southeastern Nigeria

Loading document ...
Page
of
Loading page ...

Author(s)

Author(s): Charles C. Sholokwu, Ndukauba Egesi

Download Full PDF Read Complete Article

DOI: 10.18483/ijSci.1416 101 368 21-30 Volume 7 - Jan 2018

Abstract

The study area is part of the Basement Complex of Southeastern Nigeria. The major rock units in the area comprises of intrusives (pegmatites, dolerites and charnockites), and the host metamorphic rocks are; quartzites, migmatites, schists, and biotite gneiss. Structural evidence shows that the rocks are deformed and were intruded by the magmatic rocks. The metamorphic rocks are strongly deformed in N-S to NE-SW direction. The charnockites is composed of quartz, 32%, plagioclase, 25%, K-feldspar, 20%, hornblende, 15% and other accessory minerals. The dolerite consists of olivine, 30%, biotite, 17% and hornblende, 16%. It shows ophitic texture. Schist and migmatite indicatess faults, fractures, mineral lineations and planar features. Variation in structural trend and mineralogical composition of the metamorphic rocks is due to the series of deformational activities; metamorphism and magmatism, which has affected the rocks during geologic time. The small scale geological structures which were used to interpret large scale structures, are of the size a field outcrop scale of 1cm to 10km of the district geological features.

Keywords

Rocks, Deformation, Metamorphism, Intrusions, Structures, Basement SE, Nigeria

References

  1. Edet, A. E., Teme, S. S., Okereke, C. S. and Esu, E. O., (1994). Lineament analysis for groundwater exploration in Precambrian Oban Massif and Obudu Plateau, SE Nigeria. Journal of Mining Geology Vol. 30, No. 1, pp. 87– 95.
  2. Egesi, N. and Ukaegbu, V. U., (2010). Petrologic and Structural Characteristics of the Basement Units of Bansara Area, southeastern Nigeria. Pacific Journal of Science and Technology (PJST) 11(1):510 – 525.
  3. Egesi, N. and Ukaegbu, V. U., (2011). Petrology and Major Element Geochemistry of Late to Post-Neoproterozoic PeraluminousGranitoids in parts of Bansara Southeastern Nigeria. The IUP J. of Earth Sciences Vol. 5 No. 3: 7-19.
  4. Egesi, N. and Ukaegbu, V.U., (2013). Petrologic and Structural Features of Basement Rocks of Parts of Mukuru Area, Southeastern Nigeria. Earth Science. Vol. 2, No. 4, pp. 96-103.
  5. Ekwueme, B.N. (2003). The Precambrian Geology and Evolution of the Southeastern Nigerian Basement Complex. University of Calabar Press, Calabar. 1-57.
  6. Ekwueme, B.N. and Shilling, H. (1995). Occurrence, Geochemistry and Geochronology of Mafic-Ultramafic Rocks in the Obudu Plateau, SE Nigeria. In: Srivastava, R.K. and Chandra, R., Eds., Magmatism in Relation to Diverse Tectonic Setting, Oxford & IBH publishing Co. Pvt Ltd., New Delhi, 291-307.
  7. Ekwueme, B.N. (1994). Structural, features of Southern Obudu Plateau, Bamendamassif, SE Nigeria: Preliminary Interpretations. Journal of Mining and Geology. 30 (1), 45 –49.
  8. Ekwueme, B.N., (1990). Rb-Sr Ages and Petrologic Features of Precambrian Rocks from the Oban Massif, Southeastern Nigeria. Precambrian Research, 47, 271-286.
  9. Ekwueme, B.N., (1987). Structural Orientations and Precambrian Deformational Episodes of Uwet Area, Oban massif SE Nigeria. Precambrian Res. 34: 269-289.
  10. Ekwueme, B.N. and Matheis G. (1995). Geochemistry and Economic value of pegmatites in the Precambrian Basement of Southeast Nigeria. (In)Magmatism in Relation to Diverse Tectonic Settlings (ed. Srivastava R.K. and Chandra R.). IBH Publishing Co., New Delhi, India. (275 – 392).
  11. Ekwueme, B. N., & Kroner, A. (1998). Single Zircon evaporation ages from the Oban Massif, Southeastern Nigeria. J. Afri. Earth Sci., 26, 195-205.
  12. Ekwueme, B. N., and Kroner, A. (1997). Zircon evaporation ages and chemical composition of migmatitic schist in the Obudu Plateau: evidence forPalaeoproterozoic (ca. 1789) components in the basement complex of southeastern Nigeria. Journal of Mining and Geology, 33 (2), 81 - 88.
  13. Ephraim, B. E. (2004). Petrology and Geochemistry of basement rocks northeast of Obudu, Bamenda Massif, Southeastern Nigeria. Unpublished Ph.D. Thesis University of Calabar 331.
  14. Grant, N. K., (1978). Structural distinction between a sedimentary cover and underlying basement in 600Mya Pan-africa domain of North-western Nigeria, West Africa. Geo. Soc. Am. Bull. 89, 50 – 58.
  15. Grant, N. K., Rex, D. and Freeth, S. J., (1972). Potassium-argon ages and strontium isotope ratio measurements from volcanic rocks in Northeast Nigeria. Contrib. Mineral. Pet., 35:277-292.
  16. Kroner, A., Ekwueme, B.N. and Pidgeon, R.T. (2001) The Oldest Rock in West Africa: SHRIMP Zircon Age for Early Archaean MigmatiticOrthogneiss at Kaduna, Northern Nigeria. The Journal of Geology, 109, 399-406.
  17. McCurry, P. (1971). Pan-African Orogeny in Northern Nigeria. Geol. Soc. Am. Bull. 82: 32513263.
  18. Obioha, Y.E. and Ekwueme, B.N. (2011). Petrology and Chemical Composition of Gneisses of Northwest Obudu Plateau, Southeastern Nigeria. Global Journal of Pure and Applied Sciences, 17, 215-226.
  19. Oluyide, P.O. (1988). Structural Trends in the Nigerian Basement Complex. In: P.O. Oluyide. Precambrian Geology of Nigeria. Geol. Surv. Nigeria: Lagos, Nigeria. 93-98.
  20. Onyeagocha, A.C. and Ekwueme, B.N., (1982). The Pre-Pan African Structural Features of Northcentral Nigeria. Nigerian J. Min. Geol. 19(2): 74-77.
  21. Orajaka, S., (1964). Geology of the Obudu area, Ogoja province, Eastern Nigeria. Le Naturaliste Canadian, Vol. XCL, No. 3, pp. 72 – 86.
  22. Petters, S. W. 1982. Central West African Cretaceous – Tertiary benthic Foraminifera and Stratigraphy. Palaeontograhica, Abs. A, 179; 1 – 104.
  23. Rahaman, M.A. (1976). Review of the Basement Geology of South Western Nigeria. In: Kogbe, C.A.(editor). Geology of Nigeria. Elizabethan Publ. Co.: Lagos, Nigeria. 41-58.
  24. Ukaegbu, V. U. and Oti, M. N., (2005). Structural elements of the Pan-African Orogeny and their geodynamic implications in Obudu Plateau,southeastern Nigeria. Journ. Min. Geol. 41, 41 – 49.
  25. Ukaegbu, V. U., (2003). The Petrology and Geochemistry of parts of southern Obudu Plateau, Bamenda Massif southeastern Nigeria. Unpublished Ph.D. Dissertation. Univ. of Port Harcourt, Nigeria p.321.
  26. Ukwang, E.E. (1998). Petrology and Geochemistry of Uwortung-Utugwang area, Obudu Plateau, southeastern Nigeria. Unpublished M.Sc. Thesis, Univ.Calabar, Nigeria, 87pp.
  27. Umeji, A.C. (1988). The Precambrian of part of southeastern Nigeria: a magmatic and tectonic study. In: P.O. Olujide (co-ordinator), Precambrian Geology of Nigeria. Geol. Surv. Nigeria, p. 69-75.

Cite this Article:

  • BibTex
  • RIS
  • APA
  • Harvard
  • IEEE
  • MLA
  • Vancouver
  • Chicago

International Journal of Sciences is Open Access Journal.
This article is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License.
Author(s) retain the copyrights of this article, though, publication rights are with Alkhaer Publications.

Search Articles

Issue November 2019

Volume 8, November 2019


Table of Contents


Order Print Copy

World-wide Delivery is FREE

Share this Issue with Friends:


Submit your Paper