Browsing by Author "Omanayin, Y. A."

Now showing 1 - 20 of 23

Assessment of Groundwater Quality for Irrigation Purposes in parts of Minna Sheet 164, North-Central Nigeria
(Nigerian Association of Hydrogeologists (NAH) Book of Abstract, 2022-11) Ameh, I. M.; Ibrahim, H. A.; Amadi, A. N.; Dan-Hassan, M. A.; Omanayin, Y. A.; Abubakar, A. E.
Assessing groundwater quality for sustainable agricultural through irrigation farming cannot be over-emphasized. Groundwater quality assessment for irrigation purposes was carried out in part of Minna Sheet 164, North-central Nigeria. Borehole samples were collected from boreholes and sent to the laboratory for the following analysis; pH, total dissolved solid and electrical conductance, calcium, magnesium, sodium and potassium, carbonate, sulphate, chlorine and bicarbonate. The pH ranged from 6.5 to 7.4, total dissolved solids varied from 20.4 mg/L to 124.5 mg/L while the electrical conductivity varies from 32.5 µs/cm to 250.0 µs/cm. the concentrations of these physical parameters are important criteria for suitability of water for agricultural purposes as water with low pH, high values of electrical conductivity and total dissolved solids is not good for irrigation. Also, the results of the major cations and anions were converted to meq/l from mg/l and used to determine the following index properties for irrigation water; Sodium Adsorption Ration, Soluble Sodium Percentage, Magnesium Adsorption Ratio, Plasticity Index, Residual Sodium Bicarbonate and Kelly’s Ratio. The values of the computed irrigation quality parameters are within their respective allowable limit for good to excellent water for irrigation use. The study has established that groundwater resources within the study area are suitable for irrigation. It is therefore recommended farmers in these localities should be sensitized to explore groundwater resources in their domain through hand-dug wells or boreholes to supplement the short-lived rain-farming. This will ensure an all year-round farming and availability of farm products and guaranty food security in the state.
Bacteriological and Physico-chemical Analysis of Well Water from Villages in Edati, Niger State, North-central Nigeria
(International Journal of Engineering Research and Development, 2014-03) Amadi, A. N.; Ameh, I. M; Ezeagu, G. G.; Angwa, E. M.; Omanayin, Y. A.
The physico-chemical and bacteriological properties of water from hand-dug wells from villages in Edati communities was evaluated in this study. The water samples were analyzed in accordance with the standard procedures for water analysis. The results of the physico-chemical and bacteriological analysis revealed that all the parameters were below the maximum permissible limit for a safe drinking water recommended by Nigerian Standard for Drinking Water Quality except iron, manganese, E.coli and total coliform whose concentration in some locations were higher than the acceptable limit. The high iron and bacterial coliform may be attributed to the shallow well depth, distance to pit latrine/soakaway, improper well construction, inadequate of well lining and land use system in the area. The results obtained indicates that the groundwater quality of Edati fall between the maximum permissible limit of NSDWQ. It is therefore recommended that provision of hand dug wells and boreholes in this area should not be in proximity with the pit-latrines, septic and dump sites. Keywords:- Quality analysis, Well-water, Edati community, Niger State, Nigeria
Characterization of Pegmatites in Ogodo-Odobola Area of Idah Sheet 267NW, Central Nigeria
(INTERNATIONAL JOURNAL OF SCIENCE FOR GLOBAL SUSTAINABILITY, 2023-07) Omanayin, Y. A.; Waziri, N. M.; Onoduku, U. S.; Alabi, A. A.
The pegmatites of Ogodo-Odobola area around Ajaokuta, Central Nigeria belong to the pegmatite belt of Central Nigeria. A detailed geological mapping of the pegmatites and host rocks was conducted with the aim of understanding their mode of occurrence and field relationship and to assess their mineralization potentials. Twelve (12) representative samples of rocks were selected for petrographic analysis. The results show that the area is underlain by migmatite-gneiss, schist, with intrusions of granite and pegmatite. The pegmatites occur in tabular form with varying widths (2 centimetres – 6 metres) and lengths (12 – 200 metres). Principal joint direction is NNE-SSW which is believed to have influenced the pegmatite emplacement. Petrography of the representative rock samples revealed an average mineralogical composition of biotite (23.90%), microcline (22.15%), hornblende (15.05%), quartz (10.65%), plagioclase (10.35%), muscovite (8.00%), myrmekite (0.20%), and opaque and accessory minerals (9.70%). The pegmatites were found to be dominated by microcline and plagioclase feldspars, and then muscovite, biotite, and accessory and opaque minerals. The pegmatite of the Ogodo-Odobola area is worth probing as the results have shown prospect for possible economic minerals. Keywords: Mineralization, Basement Complex, Structural Features, Petrography, Ajaokuta
COMPOSITIONAL FEATURES AND Ta-Sn-Nb RARE METAL MINERALIZATION POTENTIAL OF OGODO-ODOBOLA PEGMATITE, CENTRAL NIGERIA
(Nigerian Mining and Geosciences Society (NMGS), 59th Annual International Conference & Exhibition Book of Abstract, 2024-03) Omanayin, Y. A.; Waziri, N. M.; Onoduku, U. S.; Alabi, A. A.
Large pegmatite bodies are abundant in Ogodo-Odobola area. They occur in tabular forms and concordant to discordantly intruding the host rocks of migmatitic gneiss, schist and granite. This research is aimed at assessing the geochemical characteristics of pegmatite in the Ogodo-Odobola area to evaluate their rare metal potential. Field investigation was undertaken to determine the occurrences and relationships of the pegmatites with the host rocks. Thirty-three (33) fresh pegmatite samples were analysed using X-Ray Fluorescence (XRF), Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES) and Inductively Coupled Plasma Mass Spectrometry (ICPMS) techniques at the National Geoscience Research Laboratory, Kaduna and the Activation Laboratories Ltd. (Actlab), Ontario, Canada respectively. Major oxides in the whole rock pegmatite show that they are of siliceous (SiO2; 72.82 wt.% average) and peraluminous (Al2O3; 16.78 wt.% average) composition. The K2O, Na2O and Fe2O3 contents average 4.81 wt.%, 3.13 wt.% and 1.27 wt.% respectively while CaO, MnO, MgO, TiO2 and P2O3 are each less than 1.0 wt.%. Average values of trace elements in the pegmatite are Ta (12.40 ppm), Sn (18.36 ppm), Nb (94.51 ppm), Be (16.14 ppm), Rb (480.23 ppm), U (12.47 ppm), Cs (17.14 ppm), Ga (39.91 ppm), Ge (3.91 ppm), W (4.81 ppm), Li (40.98 ppm), Mn (890 ppm) and B (18.96 ppm). Ratios of diagnostic elements of K/Rb (75.21 ppm), K/Cs (3348.39 ppm), Rb/Sr (25.55 ppm), Rb/Cs (37.18 ppm), Ta/W (2.78 ppm), Nb/Ta (8.81 ppm), Ba/Rb (0.07 ppm) indicate a moderate index of fractionation. A/CNK >1 and Al2O3>CaO+Na2O+K2O with enrichment of SiO2, Al2O3, Na2O, K2O and depletion of Fe2O3, MnO and MgO suggests that Ogodo-Odobola pegmatite is of peraluminous bulk composition and plots of A/NK versus A/CNK and Rb versus (Y+Nb) discriminates the pegmatite in the peraluminous Lithium-Caesium-Tantalum (Li, Rb, Cs, Be, Ga, Nb Ta, Sn, B, Ge, U, W) of syn-collisional to within plate granitic family. The plots of Ta versus Cs, Ta versus Ga, Ta versus (Cs+Rb) and Be versus K/Nb, with over 70 % of the samples plotting below the Beus line and 100 % below the Gordiyenko line reveal that the pegmatites from the study area are barren to marginally mineralized in rare metals (Ta>Sn>Nb). Keywords: Pegmatite, Siliceous, Peraluminous, Rare metal, Syn-collisional
Environmental Impact of Artisanal Gold Mining around Kataeregi Area, North-Central Nigeria
(Nigerian Mining and Geosciences Society, 51st Annual Conference Book of Abstracts, 2015-03) Omanayin, Y. A.; Ogunbajo, M. I.
The geology and geochemical studies of water, stream sediments and rocks from Kataeregi artisanal gold mining, North-central Nigeria was carried out with the aim of determining its host rocks, assessing the impact of such activity on the surrounding and evaluating the suitability of the water in the area for probable uses. The field work involves the collection of representative rock, water, and sediment samples along stream, mined and background areas within the location of study. The rock and sediment samples were analyzed for trace element concentrations using X-ray fluorescence spectrometry. Water samples were analyzed for cation, anion and trace elements determinations. The average concentration of these trace elements in rocks and sediments were compared with published average crustal abundances of the elements in upper continental crust and the water compared with Nigerian Standard for Drinking Water Quality (NSDWQ, 2007) and World Health Organization (WHO, 2011) Standards. Geological field mapping show that 60% of the total area is underlain by Migmatite Granite-Gneiss complex while Schist account for 20%. The geochemical analysis of the representative rock samples indicates probable Au-Ag-Hg mineralization with average concentrations of 0.16ppm, 2.53ppm, 0.21ppm respectively. Au is hosted by the Schist rocks found within the central portion of the study area while Ag and Hg occur in both Migmatite Granite-Gneiss complex and the Schist rocks. Geochemistry of the sediment samples revealed the sediments are enriched with elements such as Au (0.23ppm), Ag (2.59ppm), Hg (0.21ppm) and Mo (1.14ppm). Findings from the water analyses and Langguth trilinear diagram revealed the water to be earth-alkaline fresh water with high alkaline content, and mostly sulphate type. The elevated Pb content in water is attributed to the influence from local geology and gold mining activities while the Fe and SO4 could results in input from oxidative weathering of pyrite associated with the gold mineralization in the area. These trace metals like Hg in rocks and sediments, and Pb in water from the study area can get consumed directly or indirectly through food chain. They are potential toxic elements that can render water unfit, causes slow growth rate in plant and respiratory, nervous and reproductive disorder in man. Regulations should be put in place to curtail excessive ground opening during mining, environmentally friendly and scientific usage of mercury in gold processing encouraged, and indiscriminate mined waste disposal discouraged. However, it is advisable to explore and exploit for Ag to compliment Au exploitation in the area. Keywords: Geology, Artisanal gold mining, Sediment Geochemistry, Water Quality, Kataeregi. North-central Nigeria
Environmental Impact of Artisanal Gold Mining on Soils in Saigbe and Environs, Part of Minna Sheet 164, North-Central Nigeria
(Minna Journal of Geosciences (MJG), 2017) Omanayin, Y. A.; Abdurrahman, R.; Akande, W. G.; Mamodu, A.; Alkali, Y. B.; Alabi, A. A.
The environmental geochemistry of soils from Saigbe and environs, Minna, North-central Nigeria was studied in an attempt to assess the impacts of artisanal gold mining activity in Saigbe and environ. Geological fieldwork carried out in the area revealed that the underlying lithologies include schist, granite and amphibolite. A geochemical soil survey was also carried out and a total number of twenty (20) soil samples were systematically collected from both mined and unmined sites within the study area, of which eight (8) representative samples were geochemically analyzed. Elemental concentrations (major and trace elements) in the soil samples were determined using X-Ray fluorescence (XRF) technique. The physical impacts observed during fieldwork in the area include loss of vegetation, land degradation, water pollution and abandoned pits. The average concentrations of the elements determined were compared with the published upper crustal abundance of the individual elements and subsequently their enrichment ratios were computed. Elements such as Ag, Au and Hg show high enrichment with 1.81 ppm, 0.03 ppm and 0.11 ppm concentrations respectively. The result from accumulation index (Igeo) also shows possible Hg contamination. This potentially toxic element can cause serious damage to the skin, nervous and digestive systems in man through direct or indirect consumption.
Exploration of Groundwater within the Mariam Babangida Girls Science Secondary School Minna, NorthCentral Nigeria Using Schlumberger Vertical Electrical Sounding Techniques
(Journal of Science, Technology, Mathematics and Education (JOSTMED), 2012-08) Momoh, O. L.; Amadi, A. N.; Abdulfatai, I. A.; Omanayin, Y. A.; Onoduku, U. S.; Onah, M.
A Geoelectrical investigation adopting Schlumberger vertical electrical sounding (VES) have been carried out to explore for groundwater within the premises of Mariam Babangida Girls Science Secondary School, Bosso, Minna, Niger State. This is with a view of to resolve the problem of acute water shortages experienced by the staff and students of the institution. The area lies within the basement rock complex of North Central Nigeria with biotite granite and muscovite granite constituting the main lithological units. The survey was carried out using ABEM SAS 300C Terrameter along five (5) established traverses with 40 m maximum electrode separation. The VES data were analyzed and interpreted through curve matching and the use of Resist software to obtain the geoelectric parameters. These were used in constructing the 1D geoelectric sections and the isopach map. The geoelectric sections revealed the presence of four geo-electric layers namely the top soil, the weathered layer, the partly weathered/fractured bedrock and the resistive bedrock. The contoured depth to bedrock contour map reveals a significant linear feature delineated by the VES as fractures beneath T2V7, T2V8 and T3V9 and is filled with clayey substratum except T3V9 that are characterized by clayey sand materials. T3V9 is therefore recommended for drilling and groundwater development to a depth of about 30 m. however, the groundwater potential of the study area is generally low.
Field and Petrographic Studies of Basement Complex Rocks in Saigbe and Environs, North-Central, Nigeria
(Nigerian Journal of Basic and Applied Sciences (NJBAS), 2023-06) Omanayin, Y. A.; Lawal, M.; Bolaji, I. B.; Muhammad, A.
Geological mapping and petrographic studies of rocks provide useful information on texture and mineralogical composition of rocks which can be used in the exploration and exploitation of any associated mineralization. However, few regional studies have been conducted in Minna and environs. Here, preliminary field mapping and petrography of out crops in Saigbe environ were conducted to determine their identification, structural and mineralogical composition. Twenty-one rock samples were collected, eight of which were used for thin section analysis. Joint directions were measured and plotted on rose diagram. Results show that Saigbe is underlain by schist, amphibolite and granite with minor pegmatite intrusions. Joints, faults, fold and foliations constitute main structures. Joints in the schists trend NE-SW, while those in the granites trend NW-SE, suggesting different episodes of emplacement for both rocks. Petrography revealed that the schists comprised quartz, biotite, muscovite, plagioclase and opaque mineral, while the amphibolites are composed largely of quartz, hornblende, plagioclase feldspar and opaque minerals. The granites are composed of quartz, microcline, plagioclase feldspar, muscovite and opaque minerals. The pegmatite dykes in the granites comprised quartz, plagioclase feldspar, orthoclase feldspar, muscovite and gemstones, hence interpreted as product of residual melt. The pegmatites make interesting target for mineral exploration. Keywords: Older Granite, Basement Complex, Petrography, Pegmatites, Northern Nigeria
Geochemical analysis of Jakura-Obajana Marble, Kogi State, North Central Nigeria: Implication for their Industrial Uses
(Minna Journal of Geosciences (MJG), 2017) Mamodu, A.; Ako, T. A.; Unuevho, C. I.; Omanayin, Y. A.; Ile, O. T.
Geochemical analysis of the Jakura-Obajana marble deposit in Kogi State, North Central Nigeria was investigated. The paper seeks to put into perspective the diverse uses of marble which hinges on its geochemical characterization. Besides the popular use of marble for cement production, the research tends to elucidate other uses of marble predicted on predefined specifications. This will trigger optimal benefit of the Jakura-Obajana marble deposit. To achieve this, fieldwork was carried out to map the rock units underlying the area. Representative marble samples were randomly collected for laboratory analysis using XRF at the Nigerian Geological Survey Agency, Kaduna. The result of the field work reveals that the Jakura-Obajana marble was found occurred with limestone, quartzite and schist. It was also found that marble are the most dominant rock types in the study area. The colour varies from white to grey and the grain sizes range from fine to medium. The geochemical result reveals that CaO and MgO have the average content of 32.37 wt% and 19.57 wt% respectively. The average content of the oxides is 99.43 wt% and the average loss of ignition (LOI) is 43.01 wt%. The average CaCO3 and MgCO3 content of the Jakura-Obajana marble are 58.33 wt% and 41.08 wt% respectively. The percentages indicate that CaCO3 higher than MgCO3. This implies that, the Jakura marble is calcitic in origin. The total carbonate content in the marble is 99.41 %. This makes it suitable for fertilizer production, cement production, and in the production of useful industrial chemical such as sodium carbonate, bicarbonate and hydroxide. It is concluded that the investigated marble deposits have other potential areas of application in addition to usage for cement production, except for animal feeds production and usage as fluxes in steel production.
Geochemical Investigation and Physical Impact Assessment of Artisanal Gold Mining, Kataeregi, North-Central Nigeria
(INTERNATIONAL JOURNAL OF SCIENCE FOR GLOBAL SUSTAINABILITY, 2016-06) Omanayin, Y. A.; Ogunbajo, M. I.; Waziri, N. M.; Ako, T. A.; Shuaibu, A. M.; Alaku, I. O.
The geochemistry of mine products and stream sediments from Kataeregi area in Northcentral Nigeria was studied with the objective of environmental hazards assessment that is caused by artisanal gold mining activities through field work and laboratory analyses. The field work involves the observation of physical impact of mining on the environment and collection of representative samples along the streams, mined site and tailings within the location of study. The sediment samples were analyzed using X-ray fluorescence spectrometry. The result obtained from laboratory analysis was compared with the ideal average crustal concentration of the elements in upper continental crust. Field observation revealed that mining activity has impacted on the environment with land destruction, loss of vegetation and erosion of soils. Geological field mapping show the area is underlain with Migmatite-Gneiss complex, Mica Schist, Granite and Sandstone lithologies. Results from geochemical analysis revealed that sediments are enriched with elements such as Au (0.23ppm), Ag (2.59ppm), Hg (0.21ppm) and Mo (1.14ppm). The presence of Hg in sediments can get consumed directly or indirectly through food chain and passed on to human. Keywords: Artisanal gold mining; Sediment geochemistry; degradation of land; Contamination; North-central Nigeria.
Geological factors in civil engineering construction: the perspective of engineering geophysics using case histories from basement complex terrain of Nigeria
(Journal of Science and today's world, 2013-06) Momoh, O. L.; Olasehinde, P. I.; Amadi, A. N.; Asema, A. I.; Omanayin, Y. A.
Acknowledged factors of premature failure of most civil engineering construction include poor construction materials, bad design, drainage problems and usage factor. However, the foundation of civil engineering projects and its routes requires pre-knowledge of the subsurface geology that carries the load and hence the need for engineers to have adequate predesigned idea of the subsurface geology. While direct exploratory borehole drill for sample collection and insitu engineering tests are considered ultimate in this respect, the rich opportunities of geophysical tools in giving needed subsurface information cannot be over emphasized due to the combine high speed, relatively cheap and appreciable accuracy of the latter. Therefore, theoretical background of engineering geophysics and case histories from basement complex terrains of Nigeria are presented and discussed with respect to civil engineering constructions. Keywords: geological factors, engineering geophysics, civil engineering construction, basement complex
Geology and Environmental Impact of Aritsanal Gold Mining around Kataeregi area, North-Central Nigeria
(Nigerian Journal of Technological Research (NJTR), 2016) Omanayin, Y. A.; Ogunbajo, M. I.
Geology and effect of artisanal gold mining was investigated in Kataeregi and environ, North-central Nigeria with the aim of determining its host rock and assessing the impact of such activity on the surrounding. Geological field mapping show the area comprise of the Migmatite-Gneiss complex, Schist, Granite and Sandstone lithologies. The geochemical analysis of the representative rock samples indicates probable Au, Ag and Hg mineralization (0.16 ppm, 2.53 ppm and 0.21 ppm respectively on the average). Au is hosted by auriferous quartz veins within the Schist rock. Geochemistry of the sediment samples revealed the sediments are enriched with elements such as Au (0.23 ppm), Ag (2.59 ppm), Hg (0.21 ppm) and Mo (1.14 ppm). The water is earth-alkaline fresh water with high alkaline content, and mostly sulphate type. The average concentration of these elements in rocks and sediments were compared with published average crustal abundances of the elements in upper continental crust and the water compared with Nigerian Standard for Drinking Water Quality and World Health Organization Standards. Mining activity has impacted the environment with land degradation, loss of vegetation and erosion of soils. Trace elements like Hg in rocks and sediments, and Pb in water from the study area are potential toxic elements that can render water unfit, causes slow growth rate in plant and reproductive disorder in man.
GEOLOGY AND GEOCHEMISTRY OF PEGMATITES OF OGODO – ODOBOLA, NORTH CENTRAL NIGERIA: A STATUS REVIEW
(FUDMA Journal of Sciences (FJS), 2022-12) Omanayin, Y. A.; Waziri, N. M.; Onoduku, U. S.; Alabi, A. A.; Amadi, A. N.
Pegmatites are an extremely, coarse-grained igneous rocks of granitic composition, constituting of mainly large crystals of quartz, feldspar and mica. Their occurrence cut across various formations, but mostly around granitoids. They are known to host industrial, rare metals, exotic minerals and gemstones of economic value. Due to the continuous demands and recently discovered uses of some of these minerals, its continuous exploration can never be over-emphasized. Pegmatites occurrence in Nigeria were formerly confined to certain quadrants but resent research has proved they also exist in other zones too. Its occurrence in Ogodo-Odobola area is a recent discovery with scantily available literature. The Few available research work conducted on pegmatite of the Ogodo-Odobola area in Kogi State, North central Nigeria has been reviewed. The works focused on its feldspar content for economic value and the latter attempted the mineralization potential of the pegmatites. The area is revealed to be underlain by schistose and granitic lithologies and intruded by the pegmatite dykes of various dimensions. However, recent studies on granitic pegmatites have evolved just as the pegmatites, not only concentrating on their industrial potentials but also on rare metal mineralization potentials which presently are a key to unlocking the future technologically. A few of those relevant and recent studies in the field were also reviewed to bring forth new ways of dealing with this present world cake to geoscientists. White micas are a useful mineral for determining the degree of evolution in pegmatites. This was achieved in the research work using K/Rb ratios paired with incompatible elements such as Cs. Decreasing K/Rb and increasing Cs is a signs of increasing evolution. The modeling of fractional crystallization of white micas in pegmatites using these trace elements determined that the pegmatites are a result of 99% to 99.99% crystallization of a granitic melt. Keywords: Pegmatites, Ogodo-Odobola, White Mica, Kogi State, North Central, Nigeria
Geology of Basement Complex rocks in Kabo area, Kano, Northwestern Nigeria: Insights into the Trends of Mineralization in the Region
(INTERNATIONAL JOURNAL OF SCIENCE FOR GLOBAL SUSTAINABILITY, 2025-03) Lawal, M.; Mohammed, M. A.; Alalade, K. A.; Hamidu, H.; Shuaibu, A. M.; Yelwa, N. A.; Omanayin, Y. A.; Adeniyi, F. S.
Nigeria is situated in a mobile zone separating older cratons of West Africa and Gabon, and underlain by nearly equal proportions of sedimentary and crystalline rocks. The crystalline basement rocks comprises three lithological groups (the Basement Complex, the Younger Granites and the Tertiary-Recent Volcanics) that were affected by Pan African (~550 Ma) thermo-tectonic events. The Basement Complex (Precambrian) encompasses gneisses- and migmatite-complex with schist belts, granites and minor charnokites and syenites with complex history and geochronology. In Kano (Kabo NE, Sheet 80 of Nigerian Geological Survey Agency maps) NW Nigeria, outcrops of these late Precambrian – lower Paleozeoic crystalline rocks are being mined of economic minerals. However, only a few studies exist on the geology of Kabo region. Therefore, this study describes the geology (lithology, composition, associated structures and field relationship) of rocks that characterize Kabo region, Kano and discuss trends of associated mineralization using field mapping and thin section petrography. Our data also includes high-resolution photographs of evidential geology of the area, parts of which are now defaced due to intense mining activities. Results showed that Kabo area is underlain by three rock groups: a migmatite-gneiss complex, an infolded schist belt (Younger Metasediments) and the Older Granites (porphyritic biotite granites, porphyroblastic biotite-rich gneiss and fine-medium grained granites). The porphyroblastic biotite-rich gneisses of the Older Granite division trend mainly in NE-SW and cut through the migmatite-gneiss complex; they exhibit preferred mineral alignment, suggesting that they are probably granitization products of the migmatite-gneisses, later metamorphosed and deformed. The granitized bodies are enriched in tourmaline that occur both in the NE-SW porphyroblastic rocks and the schist belt. The study thus serves as guide for investment decisions on solid mineral exploration in the area, and as a handbook for students of geology and tourists who now find Kano as a relatively safe geoheritage site. Keywords: Basement Complex, Northern Nigeria, Kano
Hydrogeochemical Analysis and Potential Pollutant of Water Resources Around Ajaokuta Steel Complex, North Central, Nigeria
(Journal of Geography and Earth Sciences, 2014-06) Mamodu, A.; Onoduku, U. S.; Ako, T. A.; Abraham, S. U.; Amadi, A. N.; Omanayin, Y. A.
The citing of Ajaokuta steel complex near its major raw materials (Iron) has brought about economic development in Kogi State, Nigeria. As a result of poor management of industrial waste, the only River where most people in the community get their drinking water became polluted. The aim of this research is to determine the quality of water and its pollutant within the study area. In order to meet the objective of the research, both physical and hydrogeochemical analysis were carried out. The physical parameters determined indicated (on average), a Ph of 7.44, temperature of 27°C, electrical conductivity of 106.8us/cm and turbidity of 157.4 NTU. 20 water samples were analyzed using Flame analysis photometry and Atomic absorption spectrophotometer.The result reveals on the average: 1.227mg/l Na+ , 2.3 mg/l K+ , and 2.545mg/l Ca2+2.6mg/l NH4+ , 0.17mg/l Cu 2+ , 0.45mg/l Fe2+ , 0.4mg/l Cr3+ , 0.06mg/lMn2+<10, ug/l As3 . . There were gradual decreases in concentration in some elements as one move further away from the steel complex (inferred source of pollution). The reason for these decreases maybe due to distance from the source of pollution and seepage into the groundwater. Iron and manganese were found to be very higher when compared to World health standards. Dangote group of Company’s E.I.A report also shows higher concentration of Fe2+, Mn2+and Cu2+in plant tissue. Therefore, the research concludes that Fe2+ and Mn2+ were the main pollutants while a Cu 2+andCr3+arethe minor pollutants of water resources in the study area. The research also, preliminary concludes that poor handling of industrial waste may have contributed majorly to the pollution of water. Keywords: Ajaokuta, water, hydrogeochemical analysis, pollutant, Environmental Impact Assessment (E.I.A), industrial waste, Atomic absorption spectrophotometer
Integrated Geological and Geotechnical Properties of Subsoil for Shallow Foundation Design for M. I. Wushishi Housing Estate, Minna, Niger State, North-Central Nigeria
(Centre for Human Settlements and Urban Development Journal (CHSUDJ), Federal University of Technology, Minna, Nigeria, 2013-12) Omanayin, Y. A.; Abdullahi, I. N.; Amadi, A. N.; Momoh, O. L.; Abdulfatai, I. A.
A study of the geological and geotechnical properties of subsoil for shallow foundation design was carried out in the proposed site for the M. I. Wushishi Housing Estate in Minna, Niger State, North-Central Nigeria. The main aim of the research was to ascertain the lithological and structural characteristics of the study area in order to recommend the suitable shallow foundation design for the proposed building construction. The general geological mapping of the area revealed that the area is underlain by three lithologic units: Granite, Gneiss and Schist of Nigerian Basement Complex while the study area is predominantly underlain by Schist rock belonging to the Kushaka Formation. The principal joint direction in the area from rosette diagram is NW-SE. The area is generally low-lying and accessible through Eastern Bye-pass and Maitumbi road. The soil is heterogeneous when correlated laterally from trial pits. Both disturbed and undisturbed soil samples were collected and subjected to laboratory and sieve analysis. The liquid limit ranged from 12.00-37.00 with a mean value of 23.85 while the plastic limit varied from 7.27-30.73 with an average value of 17.17. The plasticity index varies from 1.79 to 15.13 with a mean value of 6.66 while the shrinkage potential ranged from low to medium. The maximum dry density ranged between 1.66-1.95 mg/m3 with the mean value of 1.81 mg/m3 while the optimum moisture content ranged from 8.70-21.37 with an average value of 15.16. The natural moisture content is in the order of 11.52-29.86 % with a mean value of 21.08 %. The particle size distribution curve shows that the area is sand dominated. Based on the field and laboratory results, shallow foundation (pad/strip) can be adopted for lightly loaded structures not exceeding an allowable bearing capacity of 150KN/m2 while deep/pile foundation are advocated for heavily loaded structures. Keywords: Foundation Design, Geological, Geotechnical, M. I. Wushishi Housing Estate, Minna, North-Central Nigeria
Investigation of Some Factors Responsible for Gully Erosion Activities along River Yashi, Minna, North-Central Nigeria
(Environmental Technology & Science Journal (ETSJ), 2016-06) Abdulfatai, I. A.; Okunlola, I. A.; Salihu, H. D.; Omanayin, Y. A.; Abubakar, A. E.
Investigation of some factors contributing to the propagation of gully erosion along River Yashi, Minna, North-Central Nigeria has been conducted. Field observations of anthropogenic factors and geochemical properties of soil along River Yashi were determined. The anthropogenic factors observed to contribute to the gully growth include soil excavation along the river bank and on the river bed, building on the flood plain and farm practices. Geotechnical field index properties of soil were determined followed by some laboratory index and performance tests. The outcome of the investigation indicated that; the natural moisture content varied from 8.49 to 18.21 % with an average of 12.93 %; the uncompacted bulk density (UBD) is between 0.98 to 1.23 kg/m3 with an average of 1.10kg/m3 and the compacted bulk density (CBD) is from 1.27 to 1.52kg/m3 with an average of 1.38kg/m3; the specific gravity varies through 2.15 to 2.68 and an average of 2.35; the sieve analysis result showed that coefficient of uniformity (Cu) is from 0 to 20.45 with an average of 7.63 while coefficient of curvature (Cc) is from 0 to 1.01 with an average of 0.64; the plasticity index extend from 0 to 5.63% while the average is 5.54%; the compaction result shows that the optimum moisture content (OMC) varies from 9.90 to 12.39% with an average of 11.39% while the maximum dry density (MDD) ranges from 2.14 to 2.42mg/m3 with an average of 2.2mg/m3; the triaxial shear test result shows that the angle of internal friction (AF) is from 6° to 11° with an average of 9° and the cohesion (C) is from 19 to 32kg/m2; the permeability ranges from 1.93 x 10-3 to 2.49 x 10-3cm/sec and the average is 2.14 x 10-3. The results of geotechnical tests show favourable soil condition for gully erosion growth. Slope stability, construction of rip-rap with weeping holes, cultural or vegetation method among others has been suggested as control measures.
Litho-Geochemistry, Petrogenesis and Mineralisation Potential of Amphibolite-Schists Around Gadaeregi Area, North-Central Nigeria
(Journal of Environment and Earth Science, 2017) Olose, M. A.; Abdulkadir, H.; Chaanda, M. S.; Alaku, I. O.; Omanayin, Y. A.; Iyah, R. O.
Abstract This study investigated the geochemical compositions of Amphibolite-schists around Gadaeregi area of North Central Nigeria to establish the petrogenetic evolution, geotectonic setting and associated potential mineralization. It was carried out across an area of 134.4km2 within Bida sheet 184 NE on a scale of 1: 25, 000. The area is bounded by latitudes 9o 22ꞌ 00ꞌꞌN - 9o 28ꞌ 00ꞌꞌN and longitudes 6o 17ꞌ 00ꞌꞌE - 6o 24ꞌ 00ꞌꞌE. Systematic field investigation was carried out which revealed that the area is underlain majorly by migmatite-gneiss, amphibolite schist and granite. Ten (10) samples of amphibolite-schist were subjected to geochemical analysis with reference to major oxide and trace elements using X-ray fluorescence (XRF). Plotting the geochemical results on typical discrimination diagrams revealed that the amphibolite-schists are of calc-alkaline and tholeiitic affinity. It shows a sedimentary origin, basaltic/andesitic progenitor and mixed (continental and oceanic) tectonic setting. Furthermore, the mineralization potential of the area was noted by comparing the result of trace elements in this study with their respective established crustal abundances, hence, Pb, Ag, Bi, Hg, Re, Pd, Ru and Au showed considerable anomalous concentrations in all/or some of the samples, though Au showed highest anomalies. This agrees with the fact that potential mineralization of Au is generally high within the schist belts of Nigeria. It is highly recommended that high resolution sampling at a larger scale be made to delineate the points with high prospects. Keywords: Gadaeregi, Amphibolite-Schist, Geochemistry
Petrography and Geochemical Classification of the Saigbe Granites, North Central Nigeria
(Ilorin Journal of Science, 2022) Omanayin, Y. A.; Abubakar, J.; Owuri, A. S.
This work involves detailed field, petrographic and geochemical studies of Saigbe granites to bring forth their possible petrogenesis. Geological field mapping reveals the basement rocks of the Saigbe area consist of schist, amphibolite, and granite with minor intrusion of pegmatitic veins. Structural features were also discerned with principal joint direction as plotted on rose diagrams showing NWW – SEE for the granites. A total of ten granitic rock samples were collected and described based on their field relationships. Three fresh representative rock samples were subjected to petrographic analysis while five others were later subjected to geochemical analysis using the X-ray Fluorescence (XRF) technique. Petrography of the investigated rock samples showed an average mineralogical composition of plagioclase feldspar, quartz, biotite, microcline, muscovite and a trace of opaque minerals for the granites. The result of the geochemical analysis revealed the average percentage composition of major oxides as follows; SiO2 (71.30 wt.%), Al2O3 (11.13 wt.%), Fe2O3 (3.37 wt.%), CaO (4.44 wt.%), K2O (2.18 wt.%), Na2O (1.58 wt.%), MgO (2.09 wt.%), P2O5 (0.003 wt.%), TiO2 (1.04 wt.%) and MnO (0.62 wt.%). The geochemical classification of the granitic rocks revealed that the rocks fall within the Calc-alkaline/Tholeiitic series (AFM Plot), which supports a mixed and evolved magma origin during the evolution of the granitic rock. They were also classified into both I-Type and S-Type granite based on the Al₂O3/(Na₂O+K₂O+CaO) versus SiO2 plot. Ternary plot of the granitic samples sho.ws continent.al setting for the granitic rocks in the area. Therefore, the granitic rocks in the Saigbe area can then be said to have been formed from the fractionation of magma within the continental setting as the granitic rocks range in composition from Diorite and Granodiorite to Granite. Keywords: Petrographic Characteristic, Classification, Saigbe Granites, Nigeria
Physico-Chemical and Mineralogical Characteristics of Obajana Marble Deposit, Central Nigeria: Implication for Economic Appraisal
(Nigeria Journal of Engineering and Applied Sciences (NJEAS), 2018) Alkali, Y. B.; Lawal, O. H.; Omanayin, Y. A.
Marble is one of such minerals occurring in Obajana area that can be exploited for various uses other than cement production that the area is well known for. Hence, the continuous investigation into its economic viability can never be over emphasized. The physical, geochemical and mineralogical attributes of Obajana marble was investigated for the purpose of its economic potential. Obajana marble is closely associated with meta-sedimentary and granitoid rock assemblages of the Precambrian Lokoja - Jakura Schist Belt of central Nigeria. Thirty (30) representative samples were collected from the bench crest and bench trough from the 3 pits investigated based on variation of colour, texture and structure during field investigations .Physical properties were determined for while optical microscope and X-ray fluorescence techniques were used to discern mineralogical and chemical composition of the samples. The colour ranges from whitish to dark colour minerals, with traces of brownish colour and are very attractive based on physical look. Physical parameters for the marble indicated varied compressive strength (13.84 – 93.60 MPa), hardness (3.05), specific gravity (2.72), colour brightness (83) and pH (8.3). Chemical data showed pit 1, CaO (50.30 - 53.99%); MgO (0.00 -0.38 %); pit 2, CaO (48.31 - 51.87 %); MgO, (0.41 - 1.63%) and pit 3, CaO (49.39 - 52.93%); MgO (0.06 - 1.19 %) and in general reveal calcitic marble by virtue of the CaO : MgO ratios of the marble bodies. Also, mineralogy reveals that samples are composed mainly of calcite, with minor amounts of dolomite, quartz, magnesium oxide and iron. Appraisals of the functional potential of the marble based on physical, geochemical and mineralogical characteristics indicate that Obajana marble is suitable for cement feedstock, iron and steel fluxes, fillers in paints and paper making and as extenders in the manufacture of glass as well as useful in water treatment.