Paleoecology of enugu and mamu formations in anambra. This study covers parts of five basins niger delta, calabar flank, anambra basin, mamfe basin, and lower benue trough in nigeria. Oil seepages have also been reported from parts of the basin. Geochemical evaluation of okaba odagbo coal deposit, anambra basin, nigeria onoduku, usman shehu geology department, federal university of technology, minna, nigeria. Sedimentological attributes and stratigraphic of nanka formation, anambra basin,nigeria acra 2e. Perception of sources, accessibility and consequences.
Reservoir potential, environment of deposition, tectonic. Mar 14, 2016 jl and ryno scrub up at basin and see what all the fuss is about. Paleoecology of enugu and mamu formations in anambra basin, southeastern nigeria onuigbo e. The iullemeden aquifer system is multilayered including a cretaceous continental intercalary sedimentary aquifer at the bottom, overlain by three layers of tertiary continental terminal formations. Most of the exposures of the lithofacies comprising the anambra sedimentary basin fill are exposed on the eastfacing scarp of the cuesta. Pdf the extent and distribution of groundwater resources in parts of anambra state, nigeria has been investigated. Textural characteristics of the siliciclasts of ajali. Even though these threats cut across international boundaries, this paper focuses on the nigerian geographical boundaries. Establishing river basin development authorities as a. Anambra basin is a cretaceous depocentre that received campanian to tertiary sediments nwajide, 1990 and obi, 2000. Contamination indices and heavy metal concentrations in.
It is delimited in the northeast and southwest by the basement complex while it merges with anambra and sokoto basins in sedimentary fill. The characteristic feature of his basin is the presence of. This color and contrast prompted the national geographic society in 1949, with consent from kodak film corp. Biostratigraphy and palaeoenvironment of deposition of nsukka formation, anambra basin, southeastern nigeria s. 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. P4and itiowe k5 1,5department of geology, university of port harcourt, port harcourt, nigeria 2 dept. It is a cretaceous sedimentary domain partly bounded between the southern benue trough below and the niger delta basin above. Structural interpretation of part of anambra basin nigeria.
Outcrops of the formation are well exposed along the long reach of orle stream in auchi as well as road embarkments at ayogwiri, fugar and othame environs in the western flank of the anambra basin, southwestern nigeria. The asu river group in the lower benue trough comprises the shales, limestones, and sandstone lenses of the abakaliki formation in the abakaliki area and the. 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. The main oil source formations of the anambra basin, southeastern nigeria. Anambra basin, enugu shale, rockeval pyrolysis, total organic carbon, source rock, thermal maturation introduction the anambra basin figure 1 which is a cretaceous basin is located in the southern part of the regionally extensive northeastsouthwest trending benue trough. Pdf extent and distribution of groundwater resources in parts of. Live view from the summit of arapahoe basin, facing loveland pass and the continental divide. Integrated exploration of the owambo basin, onshore namibia.
In the geological settings research carried out by. With less than 50 wells so far drilled two discoveries. The growing population was the major driver of the robust domestic petroleum products market in 2017. The geology of the owambo basin is shown in the geologic map in figure 2. Pdf a seasonal analysis of the geochemical composition of. It is believed that the anambrabenin phase of campanianmiddle eocene is strongly contested that such phenomenon did not affect the whole part of anambra basin. Threats to water resources development is a broad topic having global and national dimensions.
The formation verges on the outside of the anambra basin and dips gently to the southwest below the ajali formation. The basin is bounded to the north by bida basin and northern nigeriamassif, to the east by benue trough, to the west by west african massif, and to the south by niger delta complex fig 2. The study area lies within the anambra basin, the post santonian tectonism caused the downwarping of anambra basin and afikpo syncline. Geochemistry and geotechnical analysis of lateritic soils. Sedimentology and sequence stratigraphy of the nkporo. Geochemical evaluation of okaba odagbo coal deposit. The onland part covers an area of app 28,000 sq km and the offshore part including deep waters covers an area of about 1,45,000 square km. The state lies in the anambra basin, the first region where intensive oil exploration was carried out in nigeria. To characterize the various depositional cycles and environments of the cretaceous successions through sedimentological and foraminifera paleontological study.
The trough is characteristically linear in shape and its sedimentary. Ditch cutting samples from an exploratory nzam1 well located in the northwestern part of anambra basin were subjected to lithological. The bida basin is a nwse trending intracratonic sedimentary basin extending from kontagora in niger state of nigeria to areas slightly beyond lokoja in the south fig. Three profiles of max spread lengths of 500, 400, and 500m were conducted around the pond. Basin information directorate general of hydrocarbons dgh. This study is a contribution to our understanding of the hydrocarbon potentials of the nkporo shale in the anambra basin, nigeria. The result from the first vertical derivative shows that the northern part of the area is covered by the young biotite granite of precambrian origin, and the western edge is covered by the old granite, gneisses, and migmatite of western. The stratigraphic succession of each region was established and correlated across the basin and to the adjoining anambra basin.
Previous accounts of the stratigraphy of the lower benue trough such as those of reyment. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Evidence from field relationship and sedimentological study adeigbe, o. Sedimentation in the lower benue trough commenced with the marine albian asu river group, although some pyroclastics of aptianearly albian ages have been sparingly reported. Kodachrome basin kodachrome basin is a spectacle of towering sandstone chimneys, changing in color and shadow with the days mood from redtinged spires against a blue sky, to soft evening light settling over the desert. Biostratigraphy and paleoenvironment of the coniacian awgu. The total aeromagnetic data covering the study area was subjected to first vertical derivative, spectral depth analysis, and source parameter imaging spi. The anambra basin is a roughly triangular basin containing more than 5 km thick of sediments of varied lithologies. The basin data is derived from a lower resolution grid which has been upsampled using gmt. The flaming a logo is approximately 18 inches tall at its highest point. Olaburaimob a department of chemical and geological sciences, alhikmah university, ilorin, nigeria b department of geology, federal university, birnin kebbi, nigeria. The southern boundary of the anambra basin coincides with the northern section of the niger delta, with the basin as main precursor and the basin extends north wards beyond the benue river udo, 1970. Department of marine geology, nigeria maritime university, okerenkoko asuen, g. The stratigraphic setting of southern nigeria comprises sediments of three major sedimentary cycles.
On 2 august 2015, the management of orient petroleum resources plc said the company planned. Extent and distribution of groundwater resources in parts of. Perception of sources, accessibility and consequences of domestic water supply. The main objective was to simulate the hydrocarbon generation and expulsion in the nkporo source horizons encountered in igbariam1, iji1, and ajire1 wells drilled in the basin, using the onedimensional genesis zetaware basin modeling software. A study of hydrocarbon generation and expulsion of the. The basin is bounded to the south by the niger delta basin hinge line. Basin definition and meaning collins english dictionary. The sedimentsinthisregionare partof the asu rivergroupwhichdepositedinthe middle albian. The krishnagodavari basin, a pericratonic basin, is located in the central part of the eastern passive continental margin of india. The basin area includes the deltaic plains of the krishna and godavari rivers and the interdeltaic regions. Anambra basin has about 6,000 m of sedimentary rocks. Geology and mineral resources of the lower benue trough.
Some parts of the basin has been found to contain precampanian sediments that are as old as. Products that provide you with an experience that combines natural ingredients with escape worthy fragrances. Depositional environments, organic richness, and petroleum. Pdf this research work aimed at characterizing the stream sediments of the anambra drainage basin, in nigeria. The flow of the anambra river is released into the atlantic through various outlets forming.
Depositional environment of siliciclastic deposits on the. The study utilized twenty aeromagnetic maps on a scale of 1. The maps were digitized manually along flight lines and a total of 16,689 data points obtained. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size distribution morphologic studies. It is frequently regarded as the northwestern extension of the anambra basin to the southeast. This could have introduced an accuracy which is beyond the original data. The anambra river flows 210 kilometres mi into the niger river and is found in anambra, nigeria. 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. The investigated sections consist of coarsening upward sequences with thick, dark gray shale at the base, grading upward through siltstones into. 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.
The study area is part of anambra basin, south eastern nigeria, which lies between longitude 7o00e 7o30e and latitude 6o00n 6o30n fig. Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite. Due to geographicpositioning,the lowertroughhasinrecenttimes be describedasthe anambra basin due to stratigraphicsimilarities. Hydrocarbon generative potential of campanian source rock from ihube, anambra basin, nigeria. The main geologic units of the study area are the nanka sand ecocene, overlain by ogwashiasaba, formation oligocene and underlain by imo.
Anambra basin of which the study area lies forms part of the. The cam is cleared every morning at approximately 5. The river is the most important feeder of the river niger below lokoja. The anambra basin which includes the study area is located at the southwestern extreme of the benue trough formed after the santonian tectonic depression, dating back to 84 mya 9. The indigenous company struck oil in the anambra river basin.
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. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation. Provenance studies and sedimentology of ogwashiasaba formation, anambra basin, nigeria acra 1e. Sedimentology and sequence stratigraphy of the nkporo group. When downwarp of the kalahari basin began in the late cretaceous these rivers were backtilted into the newly formed basin and deposition of the kalahari group sediments began. Department of geology, university of benin, benin city, nigeria. Besides the differences in interpretation, the singleout crop approach adopted in the stratigraphic analysis of the nkporo group presented by nwajide and reijers 1996.
Anambra basin is located in the southeastern part of nigeria. Palynological analysis carried out in over twentyfive samples 25 yielded spores, pollens and marine species. I4, ikporukpo betty t j 5 and david inyang6 1,2 department of geology, university of port harcourt, port. The basin is 300km nesw trendingsyncline, located at the south western dip of the benue trough in south eastern nigeria. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. Anambra river1, ihadagu1 and very scanty 2d seismic information, anambra basin is under explored. The study area is located in the southern part of the anambra basin and covers about 2200 km 2.
Adegeye department of agricultural economics, university of lbadan, madan, nigeria received. Four faults designated apo 1, 2, 3, and 4 with color code blue, red, green and black and their zones were mapped. Abakaliki and anambra basins, as exposed at leru, southeastern nigeria. The data were acquired simultaneously for both methods. The anambra basin, located in the southern benue trough is a post santonian synclinal sedimentary structure containing over 5,000m thick of upper cretaceous to recent sediments. Water supply of the njikoka and awka areas of the anambra. Department of geology, anambra state university, uli.
Stratigraphic setting sedimentation in the lower benue trough commenced with the marine neocomian albian asu river group. Hydrocarbon generative potential of campanian source rock. A dem digital elevation model image of the same area is shown in figure 3. The first two cycles belong to the presantonian sediments while the third cycle belongs to postsantonian sediments which are.
All bath and body products natural, uplifting basin. To give a concise geological description of the outcrops. The main oil source formations of the anambra basin. A basin is a large or deep bowl that you use for holding liquids, or for mixing or. Majuoyovwikowhe g e, and imasuen i o, reservoir potent ial, environment of deposition, tectonic setting, and provenance of rock units in the anambra basin, southeastern nigeria. Water supply of the njikoka and awka areas of the anambra basin. This page bundles the available data for the anambra basin in the africa. The basin is a nwse trending embayment, perpendicular to the main axis of the benue trough and the niger delta basin fig. Kg basin is a polycyclic pericratonic passive margin rift basin located on the east coast of india and extends both onland and offshore. The bida basin, which is one of the major inland sedimentary basins in nigeria, is oriented in the northwest southeastern direction and perpendicular to the main axis of the benue trough and the niger delta basin of nigeria fig. To identify and characterize the various shale gas play within the anambra basin. Aug 12, 2003 mr onwumere who led a team of experts to assess the volume of gas and crude reserves in the anambra river basin as well as gauge the preparedness of the state government in the establishment of an indigenous refinery through its oil company, orient petroleum resources, said the team was impressed with what it saw on the ground. The anambra basin is a sedimentary basin in south central part of nigeria that covers an area of 40,000sq. Reyment 1965, reyment and morner 1977 and zaborski 2000 described the transgressive and regressive cycles related to marine sedimentation in the area.
Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria. Ekine, 1999, subsurface temperature variations and heat flow in the anambra basin nigeria. Anambra basin is one of the energyrich inland sedimentary basins in nigeria. Paleocurrent definition of paleocurrent by the free dictionary. Although the basin has not been fully covered by seismic investigations and remains undrilled, both ground and. Russ 1930, adeleye 1974, whiteman 1982, braide 1992, idowu and enu 1992, akande et al. Numbers indicate cretaceous and tertiary formations shown as follows.
It extends northwestward into the niger valley, northward to the jos massif and northeastward as far as lafia. Geology and mineral resources of the lower benue trough, nigeria. The first of john mcphees works in his series on geology and geologists, basin and range is a book of journeys through ancient terrains, always in juxtaposition with travels in the modern worlda history of vanished landscapes, enhanced by the histories of people who bring them to light. The owambo basin is covered by the sands of the kalahari formation. On this image the outcrops along the basin margins can be delineated. The images are hyperlinks and will open up a separate window with a high resolution pdf image of the map. The anambra imo river basin development authority, a parastatal under the federal ministry of water resources wishes to notify the general public of her intended procurement under its 2017 appropriation act. Petroleum potentials of the nigerian benue trough and. The anambra basin is about 40,000 km2 in size ogala, 2011 and is bounded to the west by the okitipupa ridge, in the east by abakaliki basin, and in the south by the niger delta basin fig. Basement exploration in kg basin the untouched frontier. Pdf palynological study of the campanomaastrichtian. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size. The ias is located in mali, niger, nigeria, algeria and benin, while the.
Agricultural administration 9 1982 3011 establishing river basin development authorities as a strategy for nigerian rural development adeduro j. A comparison of sedimentary thicknesses in the two basins indicate that the anambra basin fill reaches up to 8km compared with an average of 3. Investigation of sediment migration from the abakaliki anticlinorium to the anambra basin a geostatistical approach okiotor, m. The southern benue trough and anambra basin, southeastern nigeria. The study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. Biostratigraphy and paleoenvironment of the coniacian. The basin is bounded to the south by the niger delta hinge line. Paleoecology of enugu and mamu formations in anambra basin. Generalized geological map of nigeria boxed areas of inset showing the geological map of the anambra basin.
Gravity studies in the bida basin put the maximum thickness of the sedimentary successions at about 3. Depositional environment of kg basin, east coast of india. Jul 04, 2015 advances in life science and technology issn 22247181 paper issn 2225062x online vol. Nigeria finds oil and gas in commercial quantities in anambra. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria pdf. Subsurface evaluation of source rock and hydrocarbon. Nigerian oil and gas industry department of petroleum resources. The stratigraphic successions in the bida basin and their relationship to those in the. Palynology, source rock potential and thermal maturity of. Anambra and bida basins indicates thats the successions of the anambra basin reached up to 8 km thickness compared with an average of 3. Sedimentology and sequence stratigraphy of the nkporo group campanian maastrichtian, anambra basin, nigeria haq et al. Formation in the adjacent anambra basin during that transgressive cycle. Source rock potential and thermal maturity of the eocene. Department of geology, university of nigeria, nsukka, nigeria.