P4and itiowe k5 1,5department of geology, university of port harcourt, port harcourt, nigeria 2 dept. M 2 6 2departmentof chemical and geological sciences, alhikmah university, ilorin, nigeria 7 3department of geology, university of ibadan, ibadan, nigeria. Major and trace element geochemistry of aibian and turonian shales from the southern benue trough, nigeria l. Department of marine geology, nigeria maritime university, okerenkoko asuen, g. The bida basin is often taken to be a northwesterly extension of the anambra basin or an extension nwse. The sedimentary rocks comprise ancient cretaceous deltas, somewhat similar to the niger delta, with the nkporo shale, the mamu formation, the ajali sandstone and the nsukka formation as the main deposits. This study aimed at determining the geology and depositional environmental of these formations through field.
The main oil source formations of the anambra basin, southeastern nigeria. Major and trace element geochemistry of albian and turonian. The study of sokoto basin has revealed its geothermal gradient to range from 0. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia.
Iountains, the san fernando valley, the southern foothills of the san gabriell\1ountains. Earlier work began with the investigation of tectonism in the southern nigeria. Department of geology, ekiti state university, ado ekiti nigeria olaburaimo a. Sedimentology and sequence stratigraphy of the nkporo. Anambra basin in the lower benue trough is a major coal producing basin in nigeria where intensive exploration and exploitation activities have been on since 1916 owing to the discovery of commercial coal in udi. These continental merge the two formations yobe and gongila together as. Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria. I4, ikporukpo betty t j 5 and david inyang6 1,2 department of geology, university of port harcourt, port. Sedimentological attributes and stratigraphic of nanka formation, anambra basin,nigeria acra 2e. Russ 1930, adeleye 1974, whiteman 1982, braide 1992, idowu and enu 1992, akande et al. The iullemeden basin, also known as the sokoto basin spans mali, western niger, northwest nigeria and northern benin and began accumulating sediments in the jurassic, followed by the maastrichtian rima group, which records a brackish environment. The main geologic units of the study area are the nanka sand ecocene, overlain by ogwashiasaba, formation oligocene and underlain by imo.
Table of contents introduction location ofthe basin geology of the basin tectonichistory petroleum potentialof the basin conclusion a basinisa depressiononthe earthssurface relative tosurroundings. It was deposited into the basin in late campanian, comprising nkporo shale, owelli sandstone and enugu shale reyment, 1965 and obi, 2001. The basement rocks are also exposed in the north central, southwestern and eastern part of the country and the basement complex are separated by sedimentary rocks except in the north central where they are interwoven for descriptive purposes. Sedimentology and sequence stratigraphy of the nkporo group campanianmaastrichtian, anambra basin, nigeria shirley o. As a result of these phases, the axis of the main basin has been displaced giving rise to the abakaliki benue trough, the anambra basin and the niger delta basin.
Petroleum potentials of the nigerian benue trough and. Department of geology, anambra state university, uli, anambra state, nigeria author for correspondence abstract source rock thermal maturation of campanian enugu shale in anambra basin, southeastern nigeria was assessed by rockeval pyrolysis. Geological setting anambra basin is located in the south eastern part of nigeria. The basin is bounded to the south by the niger delta basin hinge line. Anambra basin is one of the energyrich inland sedimentary basins in nigeria 153 it is a nearly triangular shaped embayment covering about 3000 km 2 with a total sedimentary thickness of approximately 9 km 2. It is frequently regarded as the northwestern extension of the anambra basin, both of which were major depocentres during the third major transgressive cycle of southern nigeria in late cretaceous times. Petroleum potentials of the nigerian benue trough and anambra. The anambra basin is a synclinal structure consisting of more than 5,000m thick of upper cretaceous to recent sediments representing the third phase of marine sedimentation in the benue trough ladipo, 1988.
The sokoto basin nigerian sector of the iullemmeden basin. It consists predominantly of a gently undulating plain with an. Geology and depositional environment of campanomaastrichtian sediments in the anambra basin, southeastern nigeria. The stratigraphic successions in the bida basin and their relationship to those in the anambra basin is shown in figure 4 while figure 5. Geology of the continental margin beneath santa monica bay, southern california, from seismicre. Oil seepages have also been reported from parts of the basin. A similar study of the geothermal gradient of bida basin shows that it ranges from 2 to 2. Geotechnical properties and geochemical composition of. Hamza 3 1department of geology and geography, ibrahim badamasi babangida university, lapai, niger state, nigeria. Index map of niger delta and offshore nigeria showing the anambra basin and abakaliki fold belt after doust and omatsola, 1989. Palynological and sequence stratigraphy characterization of the earlylate campanian nkporo shale, orekpekpeimiegba area, anambra basin, nigeria adebayo olajide f.
Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite. Pdf palynomorphs of the first downhole shale occurrence in. Assessment of aeroradiometric data of southern anambra basin. Hydrogeophysical investigation of southern anambra basin.
The geothermal gradient of anambra basin ranges from 2. The basin is bounded to the north by bida basin and northern nigeria massif, to the east by benue trough, to the west by west africa massif and to the south by the niger delta complex fig 1. The main oil source formations of the anambra basin. Assessment of aeroradiometric data of southern anambra. The ankpa basin now has a sediment thickness of about 5000m comprising pre and post santonian.
Amajor department of geology, university of port harcourt, port harcourt, nigeria received for publication 5 september 1986 abstracta. Pdf the palynological study of the northern section of the anambra basin at odagbo, southern part of the benue river was carried out. The anambra basin also known as the lower benue trough is an. I4, ikporukpo betty t j 5 and david inyang6 1,2 department of geology, university of port harcourt, port harcourt, nigeria. Geochemical evaluation of okaba odagbo coal deposit, anambra basin, nigeria abstract. A revised stratigraphy of the bida basin, nigeria sciencedirect. Evidence from field relationship and sedimentological study. American journal of engineering research ajer 2017 w w w. Paleoecology of enugu and mamu formations in anambra basin. Anambra basin has about 6,000 m of sedimentary rocks. Stakeholders on water have asked the anambra imo river basin development authority to embark on the recycling or reuse of waste water to ensure rapid economic development of its catchment areas. He spent 12 years in chevron nigeria and overseas as earth scientist, 4 years as technical director of geoscience solutions limited and has been the managing director of dharmattan nigeria, since 2008. The study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation.
Kinematics of faults and joints at enugu area of the anambra basin d. Olatunji palystrat limited, ibadan nigeria madukwe, henry y department of geology, ekiti. Department of geology, university of benin, benin city, nigeria onepetro august, 2019. Palynomorphs of the first downhole shale occurrence in. Sedimentology and sequence stratigraphy of the nkporo group.
The tectonic evolution, structures, sedimentation and stratigraphy of the anambra basin have been described by. Department of geology, university of benin, benincity, nigeria email. Anambraimo river basin development authority asked to. Pdf palynomorphs of the first downhole shale occurrence. Chiaghanam department of geology, chukwuemeka odumegwu ojukwu university, uli, anambra state, nigeria email addres. The iullemmeden basin in northwestern nigeria is known locally as the sokoto basin.
Geology and mineral resources of the lower benue trough. 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. Obi department of geology, anambra state university, uli, nigeria abstract integration of sedimentologic and sequence stratigraphic interpretations of the. Murat 1972 noted that the geologic history of the southeastern nigeria have been controlled by three major tectonic phases. The oldest sediment in the anambra basin is nkporo group nwajide, 1990. The area of study is bounded by latitudes 700 and 900 north and longitudes 600 and 730 east of the southern part of anambra basin and covers an area of approximately 33,708 sqkm. Provenance studies and sedimentology of ogwashiasaba formation, anambra basin, nigeria acra 1e. Onuoha department of geology, university of nigeria, nsukka, enugu state, nigeria. Geological and mineral map of the study area adapted from geological and mineral map of nigeria, 2009, nigerian geological survey agency. Pdf geology and depositional environment of campano. The stratigraphic succession of each region was established and correlated across the basin and to the adjoining anambra basin.
It is part of the broader west and central african rift system. A new geological map was made for the basin which clearly demonstrates the relationship of the formations. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size distribution morphologic studies. The southern benue trough and anambra basin, southeastern. Kinematics of faults and joints at enugu area of the. Inset is map of nigeria showing ondo state modified from. Agagu and adhigije 31 also reported a division of the anambra basin into southern onitsha basin and circular northern ankpa basin separated by the nwse trending nsukka high.
Geochemical studies have been carried out on coal samples from okaba odagbo in the anambra basin of nigeria to determine their geochemical characteristics and possible use as coking coal or otherwise. Assessment of aeroradiometric data of southern anambra basin 745 kuforijimi, olorunsola. Within the anambra basin, some structural styles such as hanging walls. Evidence from field relationship and sedimentological study adeigbe, o.
Nkporo group of anambra basin, southeastern nigeria k. The borno basin temperature gradient ranges from 1. The northsouth trending awkaorlu cuesta divides the study area into two relief features, viz. His key skills include asset evaluation, reservoir management, geologic modeling. The study area is a significant part of anambra river basin stratigraphy and is basically, a result of the paleohydrogy of the region durham et al, 2008. The oban masif, southwestern nigeria basement craton and the cameroon basement complex also served as sources for the sediments of the anambra basin hoque and ezepue, 1977. Aspects of hydrocarbon potential of the tertiary imo shale.
Biostratigraphy and paleoenvironment of the coniacian. Investigation of sediment migration from the abakaliki anticlinorium to the anambra basin a geostatistical approach. Ditch cutting samples from an exploratory nzam1 well located in the northwestern part of anambra basin were subjected to lithological. Palynologiacal and paleoenvironmental investigation of the. Biostratigraphy and paleoenvironment of the coniacian awgu. Department of geology, anambra state university, uli. Geologic setting and stratigraphy the geology of the anambra basin has been well studied and documented. Paleoecology of enugu and mamu formations in anambra basin, southeastern nigeria onuigbo e. Enugu shale in anambra basin, south eastern, nigeria anozie h. Palynology, source rock potential and thermal maturity of. The basin is a nwse trending embayment, perpendicular to the main axis of the benue trough and the niger delta basin fig. Palynomorphs of the first downhole shale occurrence in three.
The tectonic evolution, structures, sedimentation and stratigraphy of the anambra basin have been described by 4, 6, 11, 2938 and others. Accepted 23 august, 2010 structural analysis of joints and fault data obtained from exposures of the enugu and mamu formations. The anambra basin is a structural depression located southwest of the benue trough. Geologic setting and stratigraphy the anambra basin is one of the cretaceous sedimentary basins of nigeria, bounded on the southwestern flank by the niger delta hinge line, northwest by the benue flank and southeast by the abakaliki fold belt. Sedimentary and petrofacies analyses of the amasiri. Earth sciences basins geology analysis cretaceous period estuaries geomorphology sediments geology. Nw extension of the anambra basin, both of which were. Sedimentary succes sions in these basins are of middle mesozoic to recent age. Geology of the continental margin beneath santa monica bay. Department of geology, university of ibadan, ibadan, nigeria.
There had, however, been strong tendencies in the past to merge the anambra basin with the niger delta basin as one. Section map of nigeria showing the regional geology of anambra basin. Paleoecology of enugu and mamu formations in anambra. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Geologic map of the anambra basin adopted from babatunde o. Accepted 23 august, 2010 structural analysis of joints and fault data obtained from exposures of. This study was undertaken to study the hydrogeophysical properties of the geologic formations that underlie the southern anambra basin and to help in delineating sites for drilling of productive boreholes in the area. Characterization of the upper cretaceous sediments in the. Nigeria is underlain by seven major sedimenta ry basins, viz.
The mineral resources so far reported in the trough by the geological survey of nigeria agency are discussed below. Geochemical evaluation of okaba odagbo coal deposit. Department of geology, federal university of technology, owerri, nigeria. Kinematics of faults and joints at enugu area of the anambra.
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