Stratigraphy of upper benue trough pdf

Sequence stratigraphic interpretation of the cretaceous. The upper benue trough is further subdivided into three basins. 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. Outcropbased sequence stratigraphic analysis and palynological biofacies were used to define depositional sequences and their bounding surfaces, and build a sequence stratigraphic model for the upper cretaceous succession of the afikpo subbasin. Palynostratigraphy and age of the sequence penetrated by. Stratigraphy of the calabar flank free pdf file sharing. The asu river group is represented in the study area by the 500 m thick seam of abakaliki shale, which occupies the core of the abakaliki anticlinorium and extends to mamfe embayment of the south eastern nigeria 19,20. Stratigraphic units of the upper benue trough 11 3. Gongola basin, upper benue trough, north eastern nigeria. The santonian sediment is unlikely to be present in the well analyzed, because, the interval do. Structuraldepth analysis of the yola arm of the upper.

The benue trough is a failed arm of a triple junction aulacogen that existed beneath the present position of the niger delta during the cretaceous time. Provenance and tectonic setting of amasiri sandstoneturonian. Petroleum potentials of the nigerian benue trough and anambra. 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 benue trough is an elongate rifted depression in which the sediments reach well over m thickness in places and have been strongly folded, probably.

The study area falls within the gongola arm of the upper benue trough. Presantonian rocks are recorded in parts of the older benue trough and in the southern anambra basin. 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 formed as a result of series of tectonism and repetitive sedimentation in the cretaceous time when south america separated from africa. Following midsantonian tectonism and magmatism, depositional axis in the benue trough was displaced westward resulting in subsidence of the anambra basin. Detailed geological mapping of the gboko area in the extreme northern part of the lower benue trough has revealed that the stratigraphy of the area cannot be understood purely on extrapolation from other parts of the benue trough. 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. This paper is intended to raise critical questions on the existence of the yolde formation as a lithologic unit in the stratigraphy of the upper benue trough, n.

Benue trough is an important frontier basin in nigeria of interest in hydrocarbon exploration. The stratigraphic succession of the middle benue basin comprises of the albian asu river group table 1. The origin of the benue trough is linked to riffing associated with the separation of south america from africa in the cretaceous times. Stratigraphic report of the middle benue trough, nigeria. Stratigraphic succession in the upper benue trough. Chemistry of maiganga coal deposit, upper benue trough, north. The benue trough is itself a product of the west and central african rift system in which it opened as a broad strikeslip fault system.

According to reyment, 1965, description of the stratigraphy and palaeogeography of different sedimentary basins in. The main stages of tectonic evolution of the benue trough are well documented in the stratigraphic succession, basically comprising three depositional sequences. The lithostratigraphy of awgu shale is mainly shaley in nature and diagenized at different degrees within various stratigraphic levels. Introduction the benue trough is a linear northeast african. Download scientific diagram stratigraphic succession in the upper benue trough. The benue trough is geographically subdivided into lower, middle and upper benue trough 4. Evaluation of arsenic concentration in rocks of kaltungo. The stratigraphy of southern benue trough is marked by a series of transgressive and regressive phases which affected the benue trough. The presence of longapertites sp 3 lawal and moullade, 1986 at the top of the zone marks the base of campanian age. Geoelectrical evaluation of groundwater potentials of shongom. A bibliography of geological studies on the benue trough of nigeria. Mcconnelnotes on leadzinc deposits of nigeria and cretaceous stratigraphy of benue and cross river valleys. It extends top to depth 235 m at the bottom where the analysis northward to the lower benue river and also forms a commenced. The basin is grouped into the upper, middle, and lower benue trough.

Reviews on the geology and stratigraphy of the benue trough and particularly the upper benue trough have been presented by several workers petters, 1982, benkhelil, 1982, dike, 1993, obaje, 1994, zaborski et al. Stratigraphically, the upper benue trough has been presented by several workers petters, 1982. Upper lower middle llandovery wenlock ludlow pridoli upper middle silurian devonian lower ordovician phanerozoic phanerozoic paleozoic asselian hadean archean precambrian proterozoic neoproterozoic mesoproterozoic paleoproterozoic neoarchean mesoarchean paleoarchean eoarchean ediacaran cryogenian tonian stenian ectasian calymmian. Sequence boundary, maximum flooding surface, system tracts, depositional sequence. The upper benue trough comprises of the area extending from the bashar mutum biyu line as far north as the dumbulwabage high of zaborski et al, 1998 which separates it from the borno basin. Materials and methods kolmani river1 well, drilled in the gongola basin, northern benue trough. The benue trough is geographically subdivided into lower, middle and upper benue troughpetter, 1982. It is geographically subdivided into lower, middle and upper portion. Sequence 4 is the topmost depositional sequence belonging to the nsukka formation. Petroleum potentials of the nigerian benue trough and.

Surface geochemical exploration in benue trough, nigeria. The niger delta basin lies in the south westernmost part of a larger tectonic structure, the benue trough. W paralic arenaceous foraminifera from the upper cretaceous of the benue trough, nigeria. Therefore, if all other conditions for the formation of hydrocarbon from organic matters like temperature and marine sediments are. Cretaceous stratigraphy of the middle and lower benue trough figure i is a map of the geology of the benue trough region of nigeria. Geology and stratigraphy of middle cretaceous sequences. Within the past few decades, much new data have been acquired on the stratigraphy of the benue trough on dating, correlation and palaeoenvironments of deposition that necessitated reassessment of previous geological reports. Geology and economic potential of barite mineralization on. The late cenomanian to early turonian was a period of. The discussion involved critical analysis of the type section and other identified sections of the formation. The trough is filled with over 5000m of predominantly aptian to maastrichtian sediments in the lower, middle and upper benue geographical regions. The stratigraphic succession in the benue trough comprises essentia. Thirty two 32 ditch cutting samples were collected from the shell nigeria exploration and. Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria.

Mar 22, 2018 the upper sb is dated at 71 ma while associated mfs is dated at 73. The stratigraphic succession in the upper benue trough is shown in fig. The benue trough is an intracontinental basin that trends sswnne for about 800 m and is about 150 m wide, and contains up to 6000 m of cretaceoustertiary sedimentary rocks and some volcanics abubakar, 2014. Bassey ce, eminue oo, ajonina hn 20 stratigraphy and depositional environments of the mamfe formation and its implication on the tectonosedimentary evolution of the ikommamfe. Sequence stratigraphy and palynological analysis of late. The niger delta basin is an extensional basin surrounded by many other basins in the area that all formed from similar processes. The sequence stratigraphic interpretations are useful in further deepening the knowledge of thesubsurface geology of the studiedwell in gongola sub basin, upper benue trough of nigeria. Biostratigraphy of upper cretaceous foraminifers of the. Middle cretaceous sequence stratigraphy at the ashaka cement.

Formation while the older sediments of the upper benue trough undergo lateral facies change in this area. It is part of the broader west and central african rift system. However, pioneering study of the abakaliki fold belt seems to be handicapped by the lack of core sections. The geology of the benue trough, though better known than the geology of many. The southern benue trough and anambra basin, southeastern. Careful appraisal of the previous works shows that both the definition and description of the. Palynological and palaeoenvironmental study of the middle. 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. Cretaceous microfossils africa foraminifera benue valley invertebrata mesozoic upper cretaceous stratigraphy west africa protista nigeria you do not currently have access to this article. Palynomorphs distribution, biostratigraphy and paleoecology. The study area is situated within the afikpo basin, lower benue trough of southeastern nigeria. Biostratigraphy and paleoenvironment of the coniacian.

Stratigraphy, basin analysis and paleooceanography. Geology and tectonosedimentary disposition of the bima sandstone. Diagram showing the stratigraphy of the upper benue trough obaje et al, 1999. Microfacies and biostratigraphy of the limestone shale. Sequence stratigraphy and controls on sedimentation of the. Chemical studies have been carried out on coal samples from maiganga coal mine, gombe formation, upper benue trough of nigeria with a view to determine theirchemical characteristics and possible utilization as coking coal or otherwise. Sequence stratigraphy, palynological evidence, anambra basin, formation, system tract. Synopsis of geology the benue trough the study area lies within the gongola subbasin of the upper benue trough. Sukuliye sekule formation, facies equivalent of the numanha formation in the upper benue trough, nigeria. Lower, middle and upper benue valley in place of trough.

Geology and mineral resources of the lower benue trough, nigeria. The sedimentary fill of the benue trough consists of three unconformitybounded depositional sequences petters, 1978 and the bida and anambra regions were platforms until the santonian. The gongola basin arm of the upper benue trough is a ns trending arm of the km long benue trough. The upper sb of sequence 3 is at 68 ma while the mfs is dated at 69. Stratigraphic evolution of the benue trough and its. They consist of sedimentary sequences of shale and limestone fig. Abstract within the past few decades, much new data have been acquired on the stratigraphy of the benue trough on dating, correlation and palaeoenvironments of deposition that. Jun 26, 2019 the benue trough of nigeria figure 1a is an intracontinental basin in central west africa that extends ne to sw. Sequence 3 consists of the upper mamu formation and the ajali formation. This paper therefore, attempts to update the knowledge on the structural setting, sequence stratigraphic successions and mineral resources of the lower benue trough. The upper benue trough is y shaped made up of three arms, namely. The spectrum of depositional environments represented in the bfnue trough.

The benue trough is a major nesw trending rift basin of 50 150km width and over km length. Late cretaceous palynostratigraphy in the gongola basin. A model for the tectonic evolution of the benue trough of. In both sections, the albian bima sandstone is deposited in an uncomfortable position on. A bibliography of geological studies on the benue trough of. Stratigraphic evolution of the benue trough and its implications for the upper cretaceous paleogeography of west africa. Chapter 4 the benue trough ibrahim badamasi babangida. Middle cretaceous sequence stratigraphy at the ashaka cement quarry in gongola basin of the upper benue trough, northeast nigeria suleiman u.

The stratigraphic correlations for the lower southwest, middle, and upper northeast benue is given in table 1. Stratigraphic setting sedimentation in the lower benue trough commenced with the marine neocomian albian asu river group. To the northeast, the trough is terminated by the biu volcanics and the underlying basement rocks fig 1. Previous authors interpreted the formation as transitional. Palynostratigraphy and age of the sequence penetrated by the. Biostratigraphy of upper cretaceous foraminifers of the benue. The upper benue trough of nigeria is comprised of three basins. The other side of the basin is bounded by the cameroon volcanic line and the transform passive continental. The benue trough is a sedimentary basin located in nigeria, extending from the gulf of guinea in the south to the chad basin in the north. The upper cretaceous gonglia and pindiga formations. Stratigraphic setting the benue trough is a major nesw trending rift basin of 50 150km width and over km length. Quarry in gongola basin of the upper benue trough, northeast. Hydrogeochemistry of the middle benue trough, nigeria. Geology and stratigraphy of middle cretaceous sequences northeast of afikpo basin, lower benue trough, nigeria.

In both sections, the albian bima sandstone is deposited in an uncomfortable position on the precambian basement. These faults in the lower benue trough share the same history with the formation of the benue trough, and are probably related to the initial formation and evolution of the benue trough during continental drift. A bibliography of geological studies on the benue trough. Stratigraphical successionlower benue trough nnamdi. The cretaceous sediments of the benue trough are geographically divided into lower, middle and upper benue trough fig. The benue trough was terminated by a late santonian episode of compressional folding. The benue trough is a known metallogenic province ford 1981 with the following mineral districts namely. The benue trough is conventionally subdivided into a lower benue trough, abakaliki trough of whiteman 1982, a middle benue trough and an upper benue trough benue valley respectively of whiteman 1982. Benue trough containing postdeformational campanian stratigraphy of well 1008 ranges from depth 201 m at the maastrichtian to eocene sedimentary strata. Four unconformitybounded thirdorder depositional sequences were identified.

The benue trough group 4 2018 final cretaceous geology. The upper cretaceous gongila and pindiga formations of the northeastern benue and gongola troughs in. Water samples from saline springs, boreholes, handdug wells and rivers streams from the middle benue trough are collected and analysed for cations, anions and heavy metals, using atomic absorption spectrometry aas. Abstract within the past few decades, much new data have been acquired on the stratigraphy of the benue trough on dating, correlation and palaeoenvironments of deposition that necessitated. The anambra basin, therefore, is a part of the lower benue trough containing postdeformational sediments of campanianmaastrichtian to eocene ages. Palynological stratigraphy of the upper cenomanian. Reservoir potentials of the cretaceous gombe sandstone. The stratigraphy of the abakaliki fold belt is similar to that of the southern benue trough, and paleoenvironmental interpretations in the lower benue trough are also valid here. Petroleum prospectivity of cretaceous formations in the. The benue trough is geographically subdivided into lower, middle and upper benue trough petter, 1982. Sequence boundary, maximum flooding surface, system tracts.

The basin was formed during the cretaceous period extending towards chad on the north and the niger delta on the south. The benue trough of nigeria figure 1a is an intracontinental basin in central west africa that extends ne to sw. Biostratigraphy and paleoenvironment of the coniacian awgu. Geology and mineral resources of the lower benue trough. Foraminiferal stratigraphy and paleoecological interpretation. Here, we analyse the stratigraphy and tectonic framework of the bima. Sequence stratigraphy of well dx, gongola subbasin, upper. Evolution of gongola basin upper benue trough northeastern. The zlivisporites blanensis assemblage zone is here dated coniacian age. The mechanism of the formation of the trough dominated most of the early studies carried out in the area and, although, still controversial, an unstable rrf riftrift fault triple junction model leading to plate dilation and the opening of the gulf of guinea. The middle benue trough is relatively poorly known, especially in its northeastern part. Based on this study, new stratigraphic units akpagher, mayange and ikumbur. 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.

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