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Auriferous Showings in the Bedrocks and Stream Sediments of Okemesi-Ijero Area, Southwestern Nigeria
Current Issue
Volume 4, 2017
Issue 2 (March)
Pages: 8-31   |   Vol. 4, No. 2, March 2017   |   Follow on         
Paper in PDF Downloads: 43   Since Aug. 14, 2017 Views: 1354   Since Aug. 14, 2017
Authors
[1]
Ayodele Olusiji Samuel, Department of Applied Geology, School of Earth and Mineral Sciences, The Federal University of Technology, Akure, Nigeria.
[2]
Oshin Oyeyemi Oyekunle, Department of Earth Sciences, Faculty of Natural Sciences, Ajayi Crowther University, Oyo, Nigeria.
[3]
Awokunmi Emmanuel Eyitayo, Department of Chemistry, Faculty of Science, Ekiti State University, Ado Ekiti, Nigeria.
Abstract
The bedrocks and gold mineralization have been widely studied especially, in the southern extension of the Ilesha schist belt, but information regarding stream sediments in the area is rarely available in literature. The present study therefore, focused on bedrock and stream sediments geochemical survey of Okemesi/Ijero area within the northern extension of Ilesha schist belt using an integrated approach to elucidate the gold and other associated mineral potentials. Detailed geological survey involved lithological, structural and geochemical assessment of the bedrocks. Thirty five rocks and stream sediment samples were used for this study in a grid-controlled sampling method. X-ray diffraction (XRD) using Empyrean diffractometer DY (2010) model, and X-ray fluorescence (XRF) analyses in ray flux (66.0% Lithium Tetraborate and 34.0% Lithium Metaborate) to identify the major elements, and pathfinder elements of gold. Major oxides of the bedrocks and stream sediments for major elements were determined using atomic emission spectroscopy (AES). Trace and rare earth elemental analysis was done using inductively coupled plasma mass spectrometry (ICP-MS). Data evaluation was carried out using statistical packages for software simulation. Results showed that bedrock types are quartz-biotite-schists, banded-gneiss, granite-gneiss, biotite-gneiss, calc-gneiss, porphyritic granites, charnockites, massive and schistose quartzites, mica-schists. Structural assessment of the bedrocks revealed folds, fractures and veins as products of Precambrian deformations. XRD peaks revealed quartz, (>70%), albite (22%), microcline (30%), muscovite (26%), fluorite (68%-47%), ulvospinel (61.5%). Geochemical analytical results using XRF analysis also revealed both major elements with the highest concentration in the studied samples such as SiO2 (98.70%-70.59%) and Al2O3 (0.71%-19.01%) respectively and pathfinder elements of gold such as As, Pb, Ir, Pt, Os and Ag which was an indication of gold in the rock samples and their concentration values (10-0.05 mg/kg). The result of sequential analysis also confirmed gold potentials and other associated mineralization such as Cd, Cu, Zn, Fe, Pb and Ni at different extractive phases. Au is found at the lithogenic phase and in the residual fraction of the sediments, while other metals are from anthropogenic sources. However, the folds, fractures and veins provided the structural framework for the type of mineralization in the studied area.
Keywords
Okemesi, Ijero, Bedrocks, Sediments, Mineralization, Sequential Extraction
Reference
[1]
Adefemi S. O., and Awokunmi E. E. (2009). The impact of municipal solid waste disposal in Ado-Ekiti metropolis, Ekiti state, Nigeria 3(8): 186-189
[2]
Affaton, P., Rahaman, M. A., Trompette, R and Sougy, J. (1991). The Dahomeyide Orogen: tectonothermal evolution and relationships with the Volta Basin. In: R. D. Dallmeyer, and J. P. Lécorché, J. P. (Eds). The West African Orogens and Circum-Atlantic Correlatives. IUGS- IGCP-UNESCO Project 233, Springer-VErlag, pp. 107-122.
[3]
Aluko O. O., Sridhar, M. K. C. Oluwande, P. A. (2003). Characterization of leachates from a municipal solid waste land fill site in Ibadan, Nigeria. Journal of Environmental Health Research, 2: 1-22.
[4]
Ako, B. D., Ajayi T. R., and Alabi., A. O. (1978). A geoelectrical study of Ifewara area. Journal of Mining Geology 15, 84-89.
[5]
Anifowose, A. Y. B. (2004). Remote sensing analysis of Ifewara-Zungeru megalinear in Nigeria. PhD thesis, Federal University of Technology, Akure, Nigeria, 169p.
[6]
Anifowose, A. Y. B., Odeyemi, I. B. and Borode, A. M. (2006). The tectonic significance of the Ifewara-Zungeru Megalinear in Nigeria. Proceedings of the 1st international workshop on Geodesy and Geodynamics, centre for Geodesy and Geodynamics, Toro, Bauchi State, Nigeria.
[7]
Anifowose, A. Y. B., and Borode A. M (2007). Photogeological study of the fold structure in Okemesi area, southwestern Nigeria. Journal of Mining and Geology. 43: 125-130.
[8]
Akanni, C. O. (1992). Aspect of Climate in Ogun State in maps edited by onakomuye, S. O., Oyesiku, and Jegede, F. J. Ife Journal of Science. Volume 4 (2): 5-6.
[9]
Akaeze, C. S. (2001). Solid waste analysis, characterization and management along Abak/Ikot Ekpene Road of Uyo Metropolis: A Research Project submitted to the Department of Chemistry/Biochemistry, University of Uyo, Nigeria.
[10]
Akintola, A. I., Ikhane, P. R., Bankole, S. I., Adeokurolere, D. N. (2013). Petrography and Stream sediment geochemistry of Ede and its environs, southwestern Nigeria. International Research Journal of Geology and Mining. 3(6):2276-6618.
[11]
Amusan, A. A., Ige, D. V. and Olawale R. (2005) characteristics of soil and crop uptake of metals in municipal waste dumpsites in Nigeria. Journal of Human Ecology, Kampa Rja 1(2) 161-171.
[12]
Awokunmi E. E., Asaolu S. S., and Ipinmoroti K. O. (2010). Effect of Leaching on Heavy Metals Concentration of Soil in Some Dumpsites. African Journal of Environmental Technology 4 (8): 495-499.
[13]
Awokunmi E. E., Asaolu S. S, Ajayi O. O. and Adebayo A. O., (2011). Source Identification and Sequential leaching of Heavy metals in Soil Sample collected from selected Dump Site in Ekiti State, Nigeria. Journal of International Environmental Application 4 Science 6(3): 371-379. Dara S. S., (1993). A textbook of environmental Chemistry and pollution control. S. Chand & Company Ltd. Ram Nagar Delhi 110055.
[14]
Ayodele, O. S., (2010). Remote sensing and geological evaluation of Okemesi Area, SouthwesternNigeria. African Journal of Science, Technology, Innovation and Development. Volume 2 (2): 134-153.
[15]
Ayodele, O. S (2015). Evaluation Of Bedrock and Stream Sediments For Mineral Exploration in Okemesi-Ijero Area, Southwestern Nigeria. (PhD Thesis Olabisi Onabanjo University, Ago-Iwoye, 356p).
[16]
Beus, A. A. and Grigorian, S. V. (1977). Geochemical exploration methods for mineral deposits. Applied Publishing Limited. USA. 31-270.
[17]
Black, R. (1980). Precambrian of West Africa Episodes, 4:3-8.
[18]
Boesse, J. M., Ocan, O. O. and Rahaman, M. A., (1989). Lithology and structures of the Ife-Ilesha area (abstract), the 25th annual conference. Nigerian Mining and Geosciences Society Ibadan. pp. 6-7.
[19]
Boyle, R. W., Tupper W. M., Lynch, J. Friedrich, G., Ziauddin, M., Shafiqullah, Carter M., and Bygrave, K (1996). Geochemistry of Pb, Zn, Cu, As, Sb, Mo, Sn, W, Ag, Ni, Co, Cr, Ba and M in the waters and stream sediments of the Bathrust-TaquetRiver District, New Brunswich. GSC Paper, pp. 41-65.
[20]
Burke, K. C. and Dewey, J. F., (1972). Orogeny in Africa, in Dessauvagie, T. F. J. and Whiteman, A. J. (eds) African Geology-University of Ibadan 583-608.
[21]
Caby, R and Boesse, J. M. (2001). Pan African nappe system in southwestern Nigeria: the Ife-Ilesha schist belt. Journal of African Earth Sciences, 33, 211-225.
[22]
Campaniella, M. Q., Track, M. F., and Verloo, M. G., (1995). Chemical speciation and fractionation in soil and sediment Heavy metal analysis: A review. International Journal of Environmental Analytical Chemistry 59: 225-233.
[23]
Dada, S. S. (2006). Crust forming ages and Proterozoic crustal evolution in Nigeria, a reappraisal of current interpretations. Precambrian Research, 8: 65-74.
[24]
Dara S. S (1993). A Textbook of Environmental Chemistry and Pollution Control S. Chard and Company Ltd. Ram Nagar, New Delhi, 11005. pp 90-92.
[25]
Eddy, N. O. Ndibuke, M. O., Ndibuke, E. O. (2004). Heavy metals in sediment from Cross River at Oron. African Journal of Environment Pollution and Health, 32: 25-39.
[26]
Elueze, A. A. (2000). Compositional appraisal and petrotectonic significance of the Imelu banded ferruginous rock in the Ilesha schist belt, southwestern Nigeria. Journal of Mining and Geology, 36(1), pp. 9-18.
[27]
Emmanuel, A. Ariyibi, Samuel., L. Folami, Bankole., D. Ako, Taye., R. Ajayi, Debowale.,O. Adelusi (2011). Applications of the principal component analysis on geochemical data; A case study in the basement complex of southern Ilesa area, Nigeria. Arab Journal of Geoscience 4: 239-247.
[28]
Fadipe, A. A (1988). Chemical composition of Niobium-Tantalite from granitic pegmatite and alkali granites (Egbe and Ijero mineralized region). Journal of Mining and Geology, 7: 42-47.
[29]
Folami, S. L., (1992). Interpretation of aeromagnetic anomalies in Iwaraja area, southwestern Nigeria. Journal of Mining and Geology, 28 (2): 391-396.
[30]
Gandu, A. H., Ojo, S. B., Ajakaye., D. E., (1986). A gravity study of the Precambrian in the Malufashi area of Kaduna State, Nigeria. Tectonophysics 126: 181-194.
[31]
Hubbard, F. H., (1975). Precambrian crustal development in Western Nigeria; indications from Iwo region. Geological Society of America Bulletin. 86, 548-560.
[32]
Klemm, D. D., Schneider, W. and Wagner, B. (1984). The Precambrian metavolcano-sedimentary sequence east of Ife and Ilesha, S. W Nigeria. ‘A Nigerian greenstone belt’? Journal of African Earth Sciences, (2)2: 161-176.
[33]
Mumbfu, E. M., Nforba, M. T., Cheo, E. S. (2014). Geochemical dispersion of gold in stream sediment in Paleoproterozoic Nyong Series, Southern Cameroon. Science Research. 2(6):155-165.
[34]
Ngiam L-S, Lim P-E (2001). Speciation patterns of heavy metals in tropical estuarine anoxic and oxidized sediments by different sequential extraction schemes. Sciences of the Total Environment 275: 53-61.
[35]
Odeyemi, I. B., (1993). A Comparative study of remote sensing images of the structure of the Okemesi fold belt, Nigeria. ITC Journal, 1931-1, 77-81.
[36]
Okonkwo, C. T. (1992). Structural geology of basement rocks of Jebba area, Nigeria Journal of Mining and Geology, 28 (2): 203-209.
[37]
Ojo O. M. (1988). Stream sediment geochemistry of Guburunde horst “Gongola Basin” Upper Benue Trough, Nigeria. Journal of African Earth Sciences 7: 91-101.
[38]
Okunlola, O. A., and Okorojafor, R. E. (2009). Geochemical and Petrogenetic features of the schistose rocks of the Okemesi fold belt, southwestern Nigeria. Materials and Geoenvironment. 56: 148-162.
[39]
Oluyide, P. O. (1988). Structural trends in the Nigerian basement complex. In: P. O. Oluyide, W. C Mbonu, A. E. Ogezi, I. G. Egbuniwe, A. C. Ajibade and A. C. Umeji (Eds), Precambrian Geology of Nigeria, Geological Survey of Nigeria, Kaduna, 93-98.
[40]
Oyinloye, A. O., and Steed, G. M., (1996). The Geochemistry and Geotectonic origin of the Pan African granites in Ilesha area. Global Journal of Biological and Physical Sciences. 1(7):85-90.
[41]
Panda D, Subramanian V and Panigrahy RC (1995). Geochemical fractionation of heavy metals in Chilka lake (east coast of India) – a tropical coastal lagoon. Environmental Geology 26 199–210.
[42]
Rahaman, M. A. (1988). Recent advances in the Study of the basement complex of Nigeria. In: Precambrian Geology of Nigeria. Geological Survey of Nigeria, 11-43.
[43]
Rupasinghe, D. L, Ranasighe, G. W. A. R, Fernado, C. B, Dissanayake, M. S. (2009). Statistical evaluation of stream sediment geochemistry in interpreting the river catchment of high-grade metamorphic terrains. Journal of Geochemical Exploration 103:97-114.
[44]
Tessier, A Campbel, P. G. C and Bisson, N (1979). Sequential extraction Procedure for Speciation trace metal. Analytical Chemistry. SI, 844-8SI.
[45]
Thomas R. P., Ure A. M., Davidson C. M., Little John D. Rauret G., Rubio R. (1994).
[46]
Three-stage sequential extraction procedure for the determination of metals in river sediments. Analytical Chemical Acts 286: 439-439.
[47]
Usero, J., Gumero, M., Morilo, J. Gracia, I. (1998). Comparative Study of three sequential extraction procedures for metals in marine sediments, Environment International 24: 478-496.
[48]
Watts, D. W. and Johnson, M. H. (2010). Geochemical mapping using stream sediments inwest-central Nigeria. Implications for environmental studies and mineral exploration in west Africa. Applied geochemistry, 27 (6): 1035-1062.
[49]
Wright J. B. (1965). Fracture System in Nigeria and Initiation of Fracture Zones in the South Atlantic. Tectonophysics. 34: 43–47.
[50]
Yuan C. Shi, J., He, B., Liu, J., Lang, L. and Jiang G. (2004). Speciation of heavy metals in Marine sediments from the East China Seu by lep-MS with Sequential extraction. 30:769-783.
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