Palynostratigraphy and age of the sequence penetrated by. Petroleum geology of benue trough and southeastern chad basin. 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. Geologic map of southern benue trough showing the study. The benue trough is an elongate rifted depression in which the sediments reach well. Benue state lies within the lower river benue trough in the middle belt region of nigeria. It is part of the broader west and central african rift system. 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. We suggest that the distinctive rightangled bends of the south american and. Petrology, physicochemical and thermal analyses of.
The physiological features recognized in the area are the river benue, river anambra, and river okulu. 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. Stratigraphic setting sedimentation in the lower benue trough commenced with the marine neocomian albian asu river group. Physicochemical parameters were analyzed using apha, 2012 method. 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.
Estimating the thickness of sedimentation within lower. The aptiansantonian lower benue trough was a relatively simple rift comprising a deep. Geology and mineral resources of the lower benue trough, nigeria. U a geologic field report on the geology of afikpo basin, lower benue trough, south eastern nigeria submit paper. Read hydrocarbon potential of cretaceous sediments in the lower and middle benue trough, nigeria. Petrology, physicochemical and thermal analyses of selected.
The lower benue trough is the southernmost of the three main cretaceous. 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. 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 benue trough is a major geological structure underlying a large part of nigeria and. Geology and stratigraphy of middle cretaceous sequences. Contrasting styles of leadzincbarium mineralization in the. Baryte mineral exploration in parts of the lower benue trough. Geology of parts of gboko and makurdi local government. The geology of the lower benue trough has been documented through the tectono. The trough is arbitrarily divided into lower, middle and upper regions, and the upper region is.
Stratigraphic report of the middle benue trough, nigeria. Journal of geology and mining research determination of. Introduction the benue trough is a linear northeast african. The trough is divided into lower, middle and upper regions.
The lower benue trough which includes the anambra basin is considered as the southern extension of the bida basin. The results of an interpretation of aeromagnetic anomalies over the lower and middle benue trough of nigeria are presented. Pdf the study area ishiagu which is part of the lower benue trough comprises of igneous rock. Geology and economic potential of barite mineralization on. The study area is situated within the afikpo basin, lower benue trough of southeastern nigeria. It is approximately 275,000 km2 and covered by 25 aeromagnetic maps. Petroleum geology of benue trough and southeastern chad. 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. 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. The mapped area has three drainage basins which are separated by water divide. Opening of the gulf of guinea and geological history of the. Doc geology of nigeria vincent kalu and stanless pee.
Tectonic and sedimentation framework of the lower benue trough. Petroleum potentials of the nigerian benue trough and anambra. Geology and depositional environment of the ameki formation. See below for the abstract, table of contents, list of figures, list of tables, list of appendices, list of abbreviations and chapter one. Lower, middle and upper benue valley in place of trough. Geology and stratigraphy of middle cretaceous sequences northeast of afikpo basin, lower benue trough, nigeria. The tectonic, stratigraphic and organic geochemical evaluations of these basins suggest the similarity with the contiguous basins of chad and niger republics and sudan, where commercial oil discovery have been made. 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. They include alifokpa, gabu and osina in cross river state and ishiagu in ebonyi state in the lower benue trough. Geology and mineral resources of the lower benue trough.
Based on the geology and tectonics of the lower benue trough. Use of modelling approach in evaluation of fractured shale. The anambra basin, therefore, is a part of the lower benue trough containing postdeformational sediments of campanianmaastrichtian to. 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. Palynostratigraphy and age of the sequence penetrated by the kolmani river 1 well in the gongola basin, northern benue trough, nigeria. The benue trough of nigeria figure 1a is an intracontinental basin in central west africa that extends ne to sw. Its developed during the separation of south america and africa and the. 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 geology of lower benue trough is associated with the tectonic activities. 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. 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. This paper therefore, attempts to update the knowledge on the structural setting, sequence stratigraphic successions and mineral resources of the lower benue trough. Opening of the gulf of guinea and geological history of. Geology and mineral resources of west africa pp 981 cite as.
The tectonic evolution of the the southern portion of the. The anambra basin in the west of the lower region is more recent than the rest of the trough. Geology of the area tile geology of the middle benue trough has been described in some details by offodile 1976. 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. Groundwater samples were evaluated for irrigation purpose, within selected part of oju area of benue state, nigeria. Department of geology, university of ibadan, ibadan, nigeria. Geology and baryte mineralization of the liji area, upper.
Origin of saline groundwaters in the ogoja area, lower. A model for the tectonic evolution of the benue trough of. 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 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. 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. 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. Download the complete geology project topic and material chapter 15 titled the geology of amuro and environs1 here on projects. 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.
Geology of parts of gboko and makurdi local government areas, benue state, nigeria. Oden 2012 reported that occurrences of baryte are found in various localities of eight states within the benue trough. The epigenetic leadzincbarite fluorite deposits of the benue trough are localized in ns trending fractures developed within the lower cretaceous albian shales. Estimating the thickness of sedimentation within lower benue. Hydrocarbon potential of cretaceous sediments in the lower. Petroleum potentials of the nigerian benue trough and. 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 stratigraphic correlations for the lower southwest, middle, and upper northeast benue is given in table 1 as presented by kogbe 1981a. Sedimentation in the lower benue trough commenced with the marine albian asu river group, although. The trough is filled with over 5000m of predominantly aptian to maastrichtian sediments in the lower, middle and upper benue geographical regions. Spectral depth analysis of parts of upper benue trough and. The benue trough is geographically subdivided into southern, central and northern portions nwajide, 20.
Anticlinorium of thc lower benue trough by ofocgbu an onuoha 1991. Its geographic coordinates are longitude 7 47 and 10 0 east. British geological survey technical report wc9754 overseas geology series the hydrogeology of the oju area, eastern nigeria. Baryte mineral exploration in parts of the lower benue. Interpretation of aeromagnetic anomalies over the lower and. 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.
Geology of the study area the benue trough is a sedimentary basin located in. Interpretation of aeromagnetic anomalies over the lower. The predrift fit of south america into the gulf of guinea is well known1. The study area lies within asu river group of the lower benue trough, southern part of nigeria. Contrasting styles of leadzincbarium mineralization in. About 300 gravity stations were established at 24 km intervals along an ew profile across the lower benue trough from gbokonsukkaauchi with the main. The origin of the benue trough is linked to riffing associated with the separation of south america from africa in the cretaceous times. 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. Cretaceous stratigraphy of the middle and lower benue trough figure i is a map of the geology of the benue trough region of nigeria. We suggest that the distinctive rightangled bends of the south american and african coasts result from three cretaceous. Studies on the origin and tectonic evolution of the benue trough have been based so far principally on surface geological and geochemical. Geology and economic potential of barite mineralization on gombe inlier, gombe state, nigeria dr. Early cretaceous basalt volcanism and initial continental.
Pdf an overview of the geology and hydrogeology of nigeria. The new benue state of today has twentythree 23 local government areas, which are administered by local government councils. The use of dc electrical method in baryte mineral exploration has been investigated in buruku northeast of markurdi, nigeria. The benue trough of nigeria figure 1a is an intracontinental basin in central west africa that extends ne to. W paralic arenaceous foraminifera from the upper cretaceous of the benue trough, nigeria. The tectonic evolution of the the southern portion of the benue trough, nigeria volume 109 issue 5 s. The benue trough was formed by rifting of the central west african basement, beginning at the start of the cretaceous era. Ahmed isah haruna research paper postgraduate geography earth science geology, mineralogy, soil science publish your bachelors or masters thesis, dissertation, term paper or essay.
Basin framework and basement structuring of lower benue trough. Following midsantonian tectonism and magmatism, depositional axis in the benue trough was displaced westward resulting in subsidence of the anambrabasin. The benue trough is nigerias main but not exclusive source of baryte mineralization. The benue trough, located at the gulf of guinea reentrant on the west coast of africa fig. Gravity study of lower benue trough, nigeria geological.
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. Stratigraphic evolution of the benue trough and its. 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. The enugu eng coal is on the boundary between subbituminous and high volatile c bituminous. The oldest sediments belong to the asu river group see fig. The spectrum of depositional environments represented in the bfnue trough ranges from fluvia. The geology of the middle benue trough is characterized by the presence of thick sedimentary cover of varied composition whose age ranges. 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.
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. An overview of the geology and hydrogeology of nigeria. The anambra basin, therefore, is a part of the lower benue trough containing postdeformational sediments of campanianmaastrichtian to eocene ages. The benue trough of nigeria formed as a result of series of tectonism and repetitive sedimentation in the cretaceous. O 2 1 department of geology and exploration geophysics, ebonyi state university, abakaliki, nigeria. The benue trough is one of the seven main sedimentary structural features in the sene nigeria.
1008 1552 1086 1542 951 1267 439 1550 1518 530 366 1553 96 1155 1482 664 814 156 855 7 167 1133 498 1060 1102 985 1036 912 562 79 979 188 750