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IJSTR >> Volume 7 - Issue 4, April 2018 Edition



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

Website: http://www.ijstr.org

ISSN 2277-8616



Geochemical And Mineralogical Composition Of Granitic Rock Deposits Of Michika Area NE Nigeria.

[Full Text]

 

AUTHOR(S)

Gabriel Ike Obiefuna, Peter Hassan Sini, Abubakar Maunde

 

KEYWORDS

Granites, geological mapping, Rose diagrams, Michika area, Northeastern Nigeria

 

ABSTRACT

The aim of this study is to determine the geochemical and mineralogical composition of granitic rock deposit of Michika area of northeastern Nigeria. Detailed geological mapping of an area of 188.5 Km2 around Michika area has been mapped on a scale of 1: 50,000. The mapping revealed that the area is underlain by granitic rocks of Pan African Age. These are grouped into three types: coarse grained biotite granites, coarse porphyritic granites and medium grained granites which are intruded by the new basaltic rocks of Tertiary Age. A plot of Rose Diagrams indicate they trend in the NE-SW and NW-SE directions and occurs as irregular or massive bodies, veins and sometimes as a cross-cutting discordant dykes. The fracture ranges from about 5 cm to about 2 meters. Seven samples were collected at different locations representing the three types for petrographic analyses. Petrographic studies show that the samples are essentially composed of quartz, feldspar, mica and iron oxide. Twenty samples were analyzed geochemically using XRF method to determine some major oxides which include SiO2, Al2O3, K2O, Fe2O3 and CaO. The SiO2 content are mainly (70.58%), Al2O3 (14.30%), K2O (5.44%), Fe2O3 (2.73%) and CaO (2.62%) were obtained for the samples. The results indicate that granitic bodies of the Older Granites that underlie the study area are strongly peraluminous calcalkaline igneous series that are of both lithospheric origin or are associated with subduction related areas.

 

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