Browsing by Author "Obaje, N.G."

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    G&G ASSESSMENT OF HYDROCARBON NEW BUSINESS OPPORTUNITIES IN THE BIDA BASIN OF CENTRAL NIGERIA
    (Department of Geology and Mining, Nasarawa State University Keffi, 2016-03-01) Obaje, N.G.; Idris-Nda, A.; Okoro, A.U.; Akpunonu, E.O.; Jatau, B.S.; Et al.
    An integrated study combining geological prospectivity mapping and geophysical aeromagnetic interpretation was carried out to determine hydrocarbon new business opportunities that may exist in the Bida Basin of Central Nigeria. Geological mapping was used to delineate the geological boundaries between the formations which is a significant initial criterion in evaluating hydrocarbon prospectivity. The formations deposited in the Bida Basin comprise the Bida Sandstone at the base, followed successively upward by the Sakpe, Enagi and Batati Formations in the Northern/Central Bida Basin while the Lokoja, Patti and Agbaja Formations constitute lateral equivalents in the Southern Bida Basin. Processed and interpreted geophysical aeromagnetic data over the basin juxtaposed against the geological map has led to ranking of the prospectivity as Less Prospective, Prospective and More Prospective. The Prospective and More Prospective areas constitute new hydrocarbon business opportunities in the basin. Available geochemical data show that hydrocarbon source rocks exist within the Enagi and Patti Formations in the northern and southern sections respectively. The geophysical aeromagnetic data indicates depths of more than 2,000m (> 2 Km) within the identified prospective areas. New business opportunities as used here refer to open acreages in Nigeria‟s sedimentary basins that have not been licensed out by the government (Department of Petroleum Resources) to any operator but with significant potentials for commercial hydrocarbon accumulation.
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    LITTIO-STRATIGRAPHY AND PETROLEUM SOURCE ROCK POTENTIAL OF THE SOUTHERN BIDA BASIN, NIGERIA
    (Department of Geology and Minning, Nasarawa State University Keffi, 2015-11-01) Usman, Halima Osu; Obaje, N.G.; Nghargbu, K.
    The study area is the Southern Bida Basin (Lokoja Sub-basin), extending from Gada-Biyu in the Federal Capital Territory to the Agbaja Plateau in Kogi State of Nigeria. This area is geologically underlain by three rock units namely: the Lokoja, Patti and Agbaja Formations. The Lokoja formation composes of tine to medium coarse grained sandstone, poorly sorted associated with sedimentary structural features ranging from parallel lamination to cross bedding (herring bone structures) indicating continental environment of deposition with marine tidal influxes. Suspension settling in a low energy setting was attributed to the deposition of the Patti Formation with a lithologic composition of shales and siltstones which are rhythmically interbedded with concrctional to massive bioturbated ironstones. The Agbaja Formation composes of oolitic ironstones beds. The micropaleontological studies of the rocks in this area show that (he foraminiferal assemblages in Patti Formation are lowly diversified and dominated by four (4) genera, namely: Animbaculites, Milliammina, Trochamina and Textularia. This agglutinated benthonic foraminiferal assemblage indicates deposition of the Patti Formation in an anoxic shallow marine environment.
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    Petrography and Chemical Characteristics of Sandstone Facies from the Awe Formation, Middle Benue Trough, Nigeria
    (Department of Geology and Minning, Nasarawa State University Keffi, 2017-03-06) Usman, Halima Osu; Tanko, Ishak Yau; Kuza, T.; Obaje, N.G.
    The study area covers Old Awe town and its environs, part of Akiri sheet 232 S\V. This work focused mostly on the petrography and geochemistry to determine the characteristics of sandstone facies of the Awe Formation. The areas consist of mostly sandstone of the Cenomanian Awe Formation, with intercalation of bands of shales and clays, and \olcanics (basalt). Petrographic analysis of sandstone and basalt reveal minerals such as quartz, feldspar, mica and olivine, pyroxene, quartz respectively. The dominant trend direction ot joint readings on sandstone shows NE-SW trend. Geochemical analysis of samples using Energy Dispersive X-ray Fluorescence Spectrometry (ED-XRFS) analytical method show the presence of trace elements like Zn, Cr, Cu, Zr, Pb, Rb and Sr. Contour maps and bar charts show that most of the trace elements have concentration relatively higher above normal and their elevated concentrations may have adverse environmental and health effects in the area.
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    Preliminary Studies of Structures Controlling the Flow of Brine in the Awe Brine Field
    (Department of Geology and Minning, Nasarawa State University Keffi, 2019-01-05) Usman, Halima Osu; Usman, Halima Osu; Tanko, I.Y.; Obaje, N.G.
    Studies of the Awe brine field in the middle Benue Trough have revealed interesting structural features deserving a considerable attention. Some interesting field evidence points to the probability of the occurrence of dome structures in the brine bearing sediments. This brine field is underlain by Formations of Cretaceous age (Asu River Group, Awe, Keana and Ezeaku Formations). The tectonic set up in this brine field is * dominated by the Keana anticlinorium and brine is seen to issue from flanks of the transitional beds of the Awe Formation which have been exposed by erosion.ln Old Awe town, structural features mapped revealed dips of up to 14° to 30° to the north and south. Usually, close conjugate joint systems, infilled by silica revealed the same pattern as the major fold axis, thus contribute to the flow of brine in the field.