Browsing by Author "Mariam Bolaji"

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    Geochemistry and Mineralogy of Maastrichtian Coals from the Anambra and Gongola Basins of Nigeria: Implications for Coal Quality, Resource Potential, and Agglomeration Characteristics
    (Journal of Economic Geology, 2024-06-22) Ayoola Yusuf Jimoh; Mariam Bolaji; Jimoh Ajadi; Shakirat Mustapha Aminu; Mutiu Adelodun Akinpelu
    Anambra and Gongola basins are part of the sedimentary inland basins in Nigeria characterized by fossil fuels and in response to its present energy problem, Nigeria has shifted its power generating focus to coal. The studied coals were obtained from two localities, namely Ankpa and Maiganga in Kogi and Gombe States, respectively. The coals were investigated to determine its quality in terms of use and resource potential. The coals were analyzed by proximate, ultimate, elemental, mineralogy and scanning electron microscopy-energy dispersive spectrometry analyses. The objectives of the study are to determine the coals cokability, rank, paleoenvironments, hydrocarbon potential, and slagging tendency. The average values of moisture content, ash, volatile matter, and fixed carbon are 5.54%, 16.42%, 48.45%, and 30.71%, respectively, for Ankpa coals, while Maiganga recorded 10.68%, 8.60%, 44.33%, and 36.41%, indicating high volatile subbituminous non-coking coals that are optimum for combustion and electric power generation. The Van Krevelen plot based on the H/C vs. O/C showed Type IV kerogen. The XRD results, correlation plots, and Detrital Authigenic Index (DAI) values of 7.49 and 13.49 in Ankpa and Maiganga coals, respectively, indicated that Ankpa coals are enriched in authigenic minerals like quartz, pyrite, and calcite, while kaolinite and quartz were probable detrital minerals in the Maiganga coals. The agglomeration of the coals deduced by Base/Acid (B/A), Silicon ratio (G), Silica/Alumina (S/A), Iron/Calcium (I/C), Carbon/Hydrogen (C/H), and Fixed Carbon/Volatile matter (FC/V) showed weak–medium-strong for the Ankpa coals and strong for Maiganga coals.
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    Geochemistry and Mineralogy of Maastrichtian Coals from the Anambra and Gongola Basins of Nigeria: Implications for Coal Quality, Resource Potential, and Agglomeration Characteristics
    (2024) Jimoh Yususf; Mariam Bolaji; Jimoh Ajadi; Shakirat Mustapha Aminu; Mutiu Adelodun Akinpelu
    Anambra and Gangula are part of inland sedimentary basins in Nigeria characterized by fossil fuels, and Nigeria has shifted the focus of its electricity generation to coal to solve its current energy problem. The studied charcoal was obtained from the two regions of Ankepa and Maiganga in the states of Kogi and Gombe, respectively. Charcoal was investigated to determine the quality, use, and potential of its resources. These charcoals have been decomposed using proximity, finite, elemental, mineralogy and electron microscopic analyses. The purpose of this study was to determine the coking capability, ranking, paleoanoic environments, hydrocarbon potential, and melting tendency of coals. The mean values of moisture, ash, volatile matter and fixed carbon content for Ankepa charcoal were 5.54, 16.43, 48.45 and 30.71 percent, respectively, and for Maiganga charcoal were 10.68, 8.60, and 44.33 percent, respectively. 36.41% which indicates subbituminous non-coking coals with high volatile content and are suitable for fuel and electricity generation. The Van Krulen diagram based on H/C vs. O/C showed that type IV kerogen is present. The results of XRD, correlation diagrams and values of pollutant and non-material index (DAI) of 7.49 and 13.46 for Ankepa and Maiganga charcoals showed that Ankepa charcoals were enriched with in-situ materials such as quartz, pyrite and calcite, while kaolinite and quartz are probable clastic materials in Maiganga charcoals. In summary, the accumulation of Ankepa charcoal based on acid/base ratio (B/A), silicon ratio (G), silica/alumina ratio (S/A), iron/calcium ratio (I/C), carbon/hydrogen ratio (C/H), and fixed carbon/evaporative matter ratio (FC/V) showed weak, medium and strong accumulation for Ankepa charcoal and strong accumulation for Meiganga charcoal, respectively.
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    Geochemistry and Mineralogy of Maastrichtian Coals from the Anambra and Gongola Basins of Nigeria: Implications for Coal Quality, Resource Potential, and Agglomeration Characteristics
    (Journal of Economic Geology, 2024-06-22) Ayoola Yusuf Jimoh; Mariam Bolaji; Jimoh Ajadi; Shakirat Mustapha Aminu; Mutiu Adelodun Akinpelu
    Anambra and Gongola basins are part of the sedimentary inland basins in Nigeria characterized by fossil fuels and in response to its present energy problem, Nigeria has shifted its power generating focus to coal. The studied coals were obtained from two localities, namely Ankpa and Maiganga in Kogi and Gombe States, respectively. The coals were investigated to determine its quality in terms of use and resource potential. The coals were analyzed by proximate, ultimate, elemental, mineralogy and scanning electron microscopy-energy dispersive spectrometry analyses. The objectives of the study are to determine the coals cokability, rank, paleoenvironments, hydrocarbon potential, and slagging tendency. The average values of moisture content, ash, volatile matter, and fixed carbon are 5.54%, 16.42%, 48.45%, and 30.71%, respectively, for Ankpa coals, while Maiganga recorded 10.68%, 8.60%, 44.33%, and 36.41%, indicating high volatile sub bituminous non-coking coals that are optimum for combustion and electric power generation. The Van Krevelen plot based on the H/C vs. O/C showed Type IV kerogen. The XRD results, correlation plots, and Detrital Authigenic Index (DAI) values of 7.49 and 13.49 in Ankpa and Maiganga coals, respectively, indicated that Ankpa coals are enriched in authigenic minerals like quartz, pyrite, and calcite, while kaolinite and quartz were probable detrital minerals in the Maiganga coals. The agglomeration of the coals deduced by Base/Acid (B/A), Silicon ratio (G), Silica/Alumina (S/A), Iron/Calcium (I/C), Carbon/Hydrogen (C/H), and Fixed Carbon/Volatile matter (FC/V) showed weak–medium-strong for the Ankpa coals and strong for Maiganga coals