The objective of the study was to investigate the suitability and potential of electrical resistivity tomography ert combined with vertical electrical sounding ves surveys in baryte mineral exploration over known deposits. The benue trough is a major geological structure underlying a large part of nigeria and. Based on the geology and tectonics of the lower benue trough. Twodimensional interpretation of the anomalies shows that the anomalies are best interpreted in terms of basic intrusive bodies occurring either within the cretaceous sediments or within the metamorphic basement or both. The tectonic evolution of the the southern portion of the. Cretaceous cyclic sedimentation in the southern benue trough, together with unconformities, provide a tripartite subdivision of the sedimentary succession into 1 the albian asu river group, 2 the late cenomanian to early santonian cross river group new name comprising the marine nkalagu formation new name and interfingering marginal marine sandstones, and 3 the postsantonian coal. The benue trough of nigeria formed as a result of series of tectonism and repetitive sedimentation in the cretaceous. The mapped area falls within the benue trough the oldest sedimentary rocks in nigeria is in this trough and they are of lower cretaceous age. The geology of the middle benue trough is characterized by the presence of thick sedimentary cover of varied composition whose age ranges. The area has been given less attention with regards to geological studies than the other parts of the lower benue trough or the middle benue trough. It is part of the broader west and central african rift system. The physiological features recognized in the area are the river benue, river anambra, and river okulu. About 300 gravity stations were established at 24 km intervals along an ew profile across the lower benue trough from gbokonsukkaauchi with the main. We suggest that the distinctive rightangled bends of the south american and.
They include alifokpa, gabu and osina in cross river state and ishiagu in ebonyi state in the lower benue trough. Physicochemical parameters were analyzed using apha, 2012 method. Origin of saline groundwaters in the ogoja area, lower. Geology and stratigraphy of middle cretaceous sequences. Tectonic and sedimentation framework of the lower benue trough. Ahmed isah haruna research paper postgraduate geography earth science geology, mineralogy, soil science publish your bachelors or masters thesis, dissertation, term paper or essay. The enugu eng coal is on the boundary between subbituminous and high volatile c bituminous. Estimating the thickness of sedimentation within lower benue. U a geologic field report on the geology of afikpo basin, lower benue trough, south eastern nigeria submit paper. An overview of the geology and hydrogeology of nigeria. Baryte mineral exploration in parts of the lower benue trough.
Interpretation of aeromagnetic anomalies over the lower and. Geology and depositional environment of the ameki formation. Geology of parts of gboko and makurdi local government areas, benue state, nigeria. The study area lies between longitudes 7o51le and 8o00le and latitudes 5o55ln and 6o00ln within the afikpo syncline of the cross river basin of the benue trough. Anticlinorium of thc lower benue trough by ofocgbu an onuoha 1991. Geology of the study area the study area covers extensively the upper benue trough, some parts of chad basin southern part of bornu basin, the younger granites province of bauchi area. The benue trough, located at the gulf of guinea reentrant on the west coast of africa fig. The predrift fit of south america into the gulf of guinea is well known1.
Oden 2012 reported that occurrences of baryte are found in various localities of eight states within the benue trough. Introduction the benue trough is a linear northeast african. Stratigraphic report of the middle benue trough, nigeria. Read hydrocarbon potential of cretaceous sediments in the lower and middle benue trough, nigeria. The lower benue trough which includes the anambra basin is considered as the southern extension of the bida basin. Geology and economic potential of barite mineralization on. The benue trough is nigerias main but not exclusive source of baryte mineralization. Geology and mineral resources of west africa pp 981 cite as. The benue trough is a linear, intracratonic and graben basin, 800 km long and 90 km wide on the average in eastern nigeria ogungbesan and akaegbobi 2011. Geology and mineral resources of the lower benue trough. Its developed during the separation of south america and africa and the. Pdf an overview of the geology and hydrogeology of nigeria. Gravity study of lower benue trough, nigeria geological. Petroleum potentials of the nigerian benue trough and anambra.
Hydrocarbon potential of cretaceous sediments in the lower. Geology and mineral resources of the lower benue trough, nigeria. Basin framework and basement structuring of lower benue trough. The study area is situated within the afikpo basin, lower benue trough of southeastern nigeria. Geology of the study area the benue trough is a sedimentary basin located in. The trough is arbitrarily divided into lower, middle and upper regions, and the upper region is.
The geology of the lower benue trough has been documented through the tectono. Cretaceous stratigraphy of the middle and lower benue trough figure i is a map of the geology of the benue trough region of nigeria. The lower benue trough is the southernmost of the three main cretaceous. Palynostratigraphy and age of the sequence penetrated by the kolmani river 1 well in the gongola basin, northern benue trough, nigeria. Estimating the thickness of sedimentation within lower. The anambra basin, therefore, is a part of the lower benue trough containing postdeformational sediments of campanianmaastrichtian to. We suggest that the distinctive rightangled bends of the south american and african coasts result from three cretaceous. The trough has been categorized into three different zones and they are the lower benue trough at the southern part, the middle benue trough at the center, and the upper benue trough at the northern part. Detailed field studies carried out in ishiagu, enyigbaamekiameri, wanikandewanakom, and gabuoshina which together constitute the four main areas of mineralization in the lower benue trough, show that mineralization appears restricted to nwse and ns fractures while the more common nesw fractures are barren.
Read origin of saline groundwaters in the ogoja area, lower benue trough, nigeria, journal of african earth sciences on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. The benue trough was formed by rifting of the central west african basement, beginning at the start of the cretaceous era. The lower benue trough is the southern portion of the benue trough that is believed to have originated as a failed arm of an aulacogen at the time of the opening of the south atlantic oceans during the separation of the african plate and the south american plate. Petroleum geology of benue trough and southeastern chad. Palynostratigraphy and age of the sequence penetrated by. Geologic map of southern benue trough showing the study. The study area lies within asu river group of the lower benue trough, southern part of nigeria. See below for the abstract, table of contents, list of figures, list of tables, list of appendices, list of abbreviations and chapter one. The new benue state of today has twentythree 23 local government areas, which are administered by local government councils.
Insights from new source rock facies evaluation, journal of african earth sciences on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Sedimentation in the lower benue trough commenced with the marine albian asu river group, although. Based on the results of a detailed magnetic study of the lower and middle benue trough of nigeria carried out by the author and results of previous geophysical studies of the benue trough and of similar structures elsewhere in the world, a possible model for the tectonic evolution of the benue trough has been developed. Benue state lies within the lower river benue trough in the middle belt region of nigeria. Lower benue, trough introduction the benue trough is an intracratonic rift trending southwestnortheast from about latitude 60n near the gulf of guinea to about latitude 100n south of the chad basin. Pdf the study area ishiagu which is part of the lower benue trough comprises of igneous rock. Baryte mineral exploration in parts of the lower benue. The trough is divided into lower, middle and upper regions. Download the complete geology project topic and material chapter 15 titled the geology of amuro and environs1 here on projects. Stratigraphic evolution of the benue trough and its. General dictionary of geology 5 foreword in the name of god most gracious most merciful, because of his salvation this dictionary can be completed. The benue trough of nigeria figure 1a is an intracontinental basin in central west africa that extends ne to. The oldest sediments belong to the asu river group see fig.
Opening of the gulf of guinea and geological history of the. Speculation of cenomanian hiatus in the southern and central benue trough was stalled by recognition of many deposits of this age along the entire length of the trough from south to north. This transgression entered the benue trough from the newly opened equatorial atlantic ocean and reached its peak towards the end of middle albian. Contrasting styles of leadzincbarium mineralization in the. Early cretaceous basalt volcanism and initial continental. Following midsantonian tectonism and magmatism, depositional axis in the benue trough was displaced westward resulting in subsidence of the anambrabasin. The trough is filled with over 5000m of predominantly aptian to maastrichtian sediments in the lower, middle and upper benue geographical regions.
The results of an interpretation of aeromagnetic anomalies over the lower and middle benue trough of nigeria are presented. The benue trough is a major geological structure underlying a large part of nigeria and extending about 1,000 km northeast from the bight of benin to lake chad. The anambra basin, therefore, is a part of the lower benue trough containing postdeformational sediments of campanianmaastrichtian to eocene ages. Geology and baryte mineralization of the liji area, upper. The benue trough is one of the seven main sedimentary structural features in the sene nigeria. Studies on the origin and tectonic evolution of the benue trough have been based so far principally on surface geological and geochemical. Madu and ozibo 072 then sub tributaries flow from an elevated plain of about 600ft above sea level, which serves as the main water divide of the area. Jan 21, 2019 the lower benue trough is the southern portion of the benue trough that is believed to have originated as a failed arm of an aulacogen at the time of the. The geology of lower benue trough is associated with the tectonic activities. The stratigraphic correlations for the lower southwest, middle, and upper northeast benue is given in table 1 as presented by kogbe 1981a. The benue trough of nigeria figure 1a is an intracontinental basin in central west africa that extends ne to sw. The use of dc electrical method in baryte mineral exploration has been investigated in buruku northeast of markurdi, nigeria. The spectrum of depositional environments represented in the bfnue trough ranges from fluvia.
The benue trough is a linear nesw trending anticlinorium stretching from the chad basin in the north to the gulf of guinea through niger delta in the south avbovbo 1980. The lower benue trough is the southern portion of the benue trough that is believed to have originated as a failed arm of an aulacogen at the time of the. Opening of the gulf of guinea and geological history of. It is approximately 275,000 km2 and covered by 25 aeromagnetic maps. The benue trough is geographically subdivided into southern, central and northern portions nwajide, 20. Its geographic coordinates are longitude 7 47 and 10 0 east. The mapped area has three drainage basins which are separated by water divide. The origin of the benue trough is linked to riffing associated with the separation of south america from africa in the cretaceous times. The tectonic evolution of nigerias benue trough has recently been the focus of investigations, especially in relation to continental drift and opening of the south atlantic ocean during cretaceous times. Interpretation of aeromagnetic anomalies over the lower. W paralic arenaceous foraminifera from the upper cretaceous of the benue trough, nigeria.
Petroleum geology of benue trough and southeastern chad basin. A model for the tectonic evolution of the benue trough of. Petters department of geology, university of ibadan, ibadan, nigeria abstract the main stages of tectonic evolution of the benue trough are well documented in the stratigraphic. Contrasting styles of leadzincbarium mineralization in. Doc geology of nigeria vincent kalu and stanless pee. Geology of parts of gboko and makurdi local government. Geology of the area tile geology of the middle benue trough has been described in some details by offodile 1976. Spectral depth analysis of parts of upper benue trough and. Use of modelling approach in evaluation of fractured shale. Organic petrographic results indicate vitrinite and fusinite contents steadily increase from the lower benue trough coals to the upper benue trough coals, while semifusinite and total mineral contents follow a reverse pattern. Structural geology of the lower benue trough search and discovery.
We felt so happy because we can finish this dictionary without any big trouble although we lost one of our beloved editors. Groundwater samples were evaluated for irrigation purpose, within selected part of oju area of benue state, nigeria. This paper therefore, attempts to update the knowledge on the structural setting, sequence stratigraphic successions and mineral resources of the lower benue trough. Department of geology, university of ibadan, ibadan, nigeria. British geological survey technical report wc9754 overseas geology series the hydrogeology of the oju area, eastern nigeria. Journal of geology and mining research determination of. Petrology, physicochemical and thermal analyses of. The anambra basin in the west of the lower region is more recent than the rest of the trough. The aptiansantonian lower benue trough was a relatively simple rift comprising a deep. Lower, middle and upper benue valley in place of trough. The study area covers the lower benue trough, the upper part of anambra basin, and the basement complexes bounding it at the west and northern edges figure 1. The epigenetic leadzincbarite fluorite deposits of the benue trough are localized in ns trending fractures developed within the lower cretaceous albian shales.
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