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IJSTR >> Volume 3- Issue 3, March 2014 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Physico-Chemical Characteristics And Industrial Potentials Of Lepidolite From Ijero-Aramoko Pegmatite Field, Southwestern Nigeria.

[Full Text]

 

AUTHOR(S)

Akinola, Oluwatoyin O, Okunlola, Olugbenga A, Obasi , Romanus A.

 

KEYWORDS

Index Terms: Enriched-lithium, industrial potentials. Ijero-Aramoko Ore, pegmatite.

 

ABSTRACT

Abstract: Physico-chemical characteristics and industrial potentials of lepidolites from Ijero-Aramoko pegmatite fields were investigated . Systematic mapping indicates that the lepidolite is associated with steeply inclined pegmatite intruded into the basement rocks of gneisses and schistose assemblages that are in places pulsed with isolated Pan-African granite. The lepidolite has a layered structure, a perfect unidirectional cleavage and equigranular texture. Thirty lepidolite samples were collected from the pegmatite fields and anaylsed using the Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) method .in the Activation Laboratories, Ontario Canada. The results of the analysis indicate that the silica (SiO2) content in the lepidolite ranges between 49.43 and 50.16% in Oke-Asa, 49.49-50.43% in Oke-IgboAba and 57.87-57.81% in Ijero-Ekiti mineralized areas . Average Al2O3 contents in these three areas are 27.83%, 23.02% and 28.34% respectively. In the same trend, K2O has the following average values 10.06%, 9.41%, and 5.86% while MgO, CaO and TiO2 values are generally less than 0.3% in all the samples. Trace element composition reveals higher Li, Be, Cs and Rb contents relative to Ta, Nb and Sn. The average Li values of 1859 ppm, 1778 ppm, and 1656 ppm are recorded for Oke-Asa, Oke-Igbo Aba and Ijero Ekiti respectively. The high contents of SiO2, Al2O3, and K2O as well as the unusual amount of lithium and microcline reveal the general geochemical characteristics of the lepidolite on which its industrial applications are based. Lithium compounds form sources of raw materials in the pharmaceuticals and in the making of energy lithium batteries and serves as an alloy of aluminium, magnesium and zinc.The physical tests reveal high specific Gravity (2.69-2.80; ca. 2.74), compressive strength (45.84-50.14; ca. 48.93) N/mm2, wet density (2.30 to 2.65; ca. 2.39) g/cm3, and less water absorption capacity (0.21 to 0.35; ca.0.26) %, . These physical characteristics make the lepidolites suitable for use in various industrial areas where lithium compounds are employed.

 

REFERENCES

[1]. Cerny, P. Rare-element granitic pegmatites, Part 2. Anatomy and internal evolution of pegmatite deposits: Geoscience Canada, vol. 18: pp. 49-67, 1991.

[2]. Okunlola, O. A and Akinola, O.O. Petrochemical characteristics of the Precambrian rare metal pegmatite of Oke Asa area, southwestern Nigeria: implication for Ta-Nb mineralization RMZ- Materials and Geoenvironment, vol. 57( 4): 525-538, 2010.

[3]. Okunlola, O. A. Metallogeny of Ta-Nb mineralization of Precambrian pegmatite of Nigeria. MINERAL WEALTH. pp.137, 2005.

[4]. Turner, D.G.Upper Proterozoic Schist belts in the Nigerian sector of the Pan ľAfrican Province of West Africa, Prec. Res. Vol. 21: pp.55-79. 1983.

[5]. Russ, W. The geology of Northern parts of Nigeria, Zaria and Sokoto Provinces, GSN Bull. pp. 27-42, 1957.

[6]. Oyawoye, M.O. The Geology of the Nigerian Basement Complex. Journal of Mining and Geology. Vol.1. pp. 87-102, 1964.

[7]. McCurry, P. The Geology of the Precambrian to lower Paleozoic rocks of northern Nigeria- a review of Geology of Nigeria, C.A Kogbe (ed).p 15-39 Eliz. Pub. Co. Lagos. pp.15-39, 1976.

[8]. Black, R. Precambrian of West Africa, Episode 4. pp. 3-8, 1980.

[9]. Elueze, A. A . Geochemistry and Petrotectonic setting of metasedimentary rocks of the Schist belt of Ilesha area, S. W Niger, Prec. Res.; Journ. Min. Geol.18: pp.167-177, 1981.

[10]. Truswell, J. F and Cope, R. N. The Geology of parts of Niger and Zaria provinces, Northern Nigeria: Bull. GSN, 29: p.52, 1963.