Establishment of river basins development authorities. Paleoecology of enugu and mamu formations in anambra basin. Geological and mineral map of the study area adapted from geological and mineral map of nigeria, 2009, nigerian geological survey agency. Geochemical and geophysical investigations of kaolin.
Controversy surrounding the stratigraphy of the anambra basin, depositional environments and conditions, and age of geologic formations. Basinwide stratigraphic correlation across the anambra basin using base of the. Click, drag, and drop to reorder files or press delete to remove any content you dont want. Hydrocarbon generation indications from source rock to reservoir rock. Assessment of aeroradiometric data of southern anambra. Hydrocarbon generation indications from source rock to. Anambra basin is a structural synclinal depression and one of the intracratonic basins in nigeria whose origin is related to the separation of africa from south america and the opening of south atlantic ocean ofoegbu, 1982. Diagenetic study of sandstone sediments in parts of. Case studies of anambra and abakaliki basins, southeastern nigeria rita u. Pdf petroleum potentials of the nigerian benue trough. Ogwashiasaba formation, anambra basin, palaeogene, sandstone lithofacies, nigeria. The river is the most important feeder of the river niger below lokoja. 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.
Just upload files you want to join together, reorder them with draganddrop if you need and click join files button to merge the documents. Pdf the fish fauna of anambra river basin, nigeria. Kinematics of faults and joints at enugu area of the anambra basin. Palynofacies studies of sedimentary succession in ogbabu1. Rearrange individual pages or entire files in the desired order. Upload a corrupt or damaged pdf and we will try to fix it. Sedimentology and depositional environments of the. These, in most parts of the anambra basin is overlain by the lower maastrichtian sandstones, shales, siltstones and.
Update on developments in anambra statephotos politics. The analysis and interpretation of the data sets allow the reconstruction of sedimentary facies parameters, diagenetic histories, dominant controls on sequence development, and allow an added interpretation of the sediments of the northern niger delta and anambra basin reservoir qualities. Palynology, source rock potential and thermal maturity of. The basal shale unit of the enugu formation documents very few senegalinium bicavatum and sparse burrows of thalassinoides isp. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. The flow of the anambra river is released into the atlantic through various outlets forming. Some parts of the basin has been found to contain precampanian sediments that are as old as. Geology and mineral resources of the lower benue trough, nigeria. A total of 102 bagrid fishes belonging to 4 genera and 7 species were subjected to parasitological investigation, only 32 fishes were infected with a parasitic prevalence of 31. The basin developed due to the santonian tectonic event which greatly.
Anambra is the 3rd industrialized state in nigeria anambra is the second urbanized state in nigeria anambra has the fourth largest economy in nigeria after lagos, porthacourt and abuja anambra has the largest market in africa in terms of landmass, area, geographical and volume of goods and services. The analysis and interpretation of the data sets allow the reconstruction of sedimentary facies parameters, diagenetic histories, dominant controls on sequence development, and allow an added interpretation of the sediments of the northern niger delta and anambra basin. Detrital rocks are formed by the sedimentation of minerals and rock fragments that were derived from mechanical breakdown of preexisting rocks in the source area, and were transported to a depositional site basin. The general direction of increase in geothermal gradient, originally projected as south to north by earlier workers dealing with the niger delta data and the very limited well data from the anambra basin, is. You can merge pdfs or a mix of pdf documents and other files. Although several works have proved the existence of oil and gas in the campanian to maastrichtian strata of the anambra basin, it is still. Eocene lithic fills in the anambra basin and afikpo syncline is divisible into three main transgressiveregressive cycles reyment, 1965.
In the gongola sub basin of the northern benue trough, the pindiga formation 6, represented by the marine ka nawa member, the regressive fluvial and littoral sandy. The stratigraphic evolution can be outlined using subsurface data and correlation along sections connecting several wells in the anambra basin. Anambra basin has about 6,000 m of sedimentary rocks. Assessment of aeroradiometric data of southern anambra basin 745 kuforijimi, olorunsola. Geology and mineral resources of the lower benue trough. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. The anambra basin developed during the thermal sag phase of the benue trough evolution, which formed following the platewide inversion tectonics that occurred in the santonian and possibly continuing into the maastrichtian in the northern benue trough and chad basin nwajide, 20. Sedimentology and depositional environment of the mid. Biostratigraphy and paleoenvironment of the coniacian. Recover content and data from corrupt files with ease. The inversion was a consequence of stresses that had built up because of africaeurope. 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.
Petrographic and stratigraphic analyses of palaeogene ogwashi. The nkporo shale documents the transgressive event that. Ditch cutting samples from an exploratory nzam1 well located in the northwestern part of anambra basin were subjected to lithological. Benue trough, the marine of the ezeaku facies group and the and anambra basin is related to their origin and evoluawgu formation are the lateral equivalents.
It is a shallow, linear depression with sedimentary fill of about 3,000 m thick udensi and osazuwa, 2004. Geological developments in the basin in terms of basin evolution and structural features have been discussed by many authors. The stratigraphic aspects of the sedimentary sequences of anambra basin, southern nigeria have been studied by a number of workers like kogbe 1989, amajor 1984, reyment 1965, iwuoma juliet et. Ten 10 representatives outcrop samples collected from two stratigraphic sections in the study area were analyzed chemically using inductively. Anambraimo river basin development authority asked to. These cycles correspond to major marine incursions in the late campanian, paleocene and eocene, representing second order depositional sequences murat, 1972. Campanomaastrichtian paleoenvironment, paleotectonics and. As a bath tub catches all the water that falls within its sides, a river basin sends all the water falling on the surrounding land into a central river and out to an estuary or the sea. A river basin drains all the land around a major river. This part ot the basin coincides with zones of thick, iow conductivity sediments, low ground surface elevation, and hydraulic discharge zones. 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 anambra basin is a cretaceoustertiary basin, which is the structural link between the cretaceous benue trough and the tertiary niger delta basin lucas and ishiekwene, 2010.
Stratigraphic setting sedimentation in the lower benue trough commenced with the marine neocomian albian asu river group. This study found out that there are basically five subbasins in imo state. 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. Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria. The enugu and nkporo formations are essentially marine sediments of the third transgressive cycle. Palynological and sequence stratigraphy characterization of the earlylate campanian nkporo shale, orekpekpeimiegba area, anambra basin, nigeria adebayo olajide f. The anambra basin is a cretaceous basin having almost a roughly triangular shape figure 1 with a total. However, the sedimentary successions in these basins are broadly divisible into. The youngest formation within the basin is nsukka formation. Although several works have proved the existence of oil and gas in the campanian to maastrichtian strata of the anambra basin, it is still considered a frontier basin due to the challenges associated with interpretation of stratigraphy and structure arising from nonavailability of subsurface data. Geochemistry of maastrichtian clastic sedimentary rocks. Hydrocarboncharge modelling of anambra basin, southeastern nigeria. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Integrated geochemical and organic petrographic characterization of the campanomaastrichtian sediments around enugu escarpment, anambra basin, southeastern nigeria i.
This has led to poor understanding of the petroleum system and hindered exploration activity. Hydrocarbon generation indications from source rock to reservoir. How to merge pdfs and combine pdf files adobe acrobat dc. Parasitological investigation of bagrid fishes in anambra river basin in anambra state, nigeria was carried out for two months between the month of april and may, 2015. 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. Olatunji palystrat limited, ibadan nigeria madukwe, henry y department of geology, ekiti. How the document is seen through the lens of each selected hierarchical view taxonomy. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria pdf. Biostratigraphy and paleoenvironment of the coniacian awgu.
An act to repeal the river basins development authorities act 1979 and establish. The northwest southeastern trending bida basin forms one of the major inland sedimentary basins in nigeria. Aromatic hydrocarbon distribution and calculation of oil and gas volumes in postsantonian shale and coal, anambra basin, nigeria. Abakaliki and anambra basins, as exposed at leru, southeastern nigeria. Anambra basin is one of the energyrich inland sedimentary basins in nigeria. Petroleum potentials of the nigerian benue trough and. A river basin is the land that water flows across or under on its way to a river. The basin is a nwse trending embayment, perpendicular to the main axis of the benue trough and the niger delta basin fig. This sedimentary phase was initiated by the santonian folding and uplift of the abakaliki anticlinorium along the ne. The basin is bounded to the south by the niger delta basin hinge line. This analysis also afforded definite subsurface evidence for the cenomanian as well as the santonian deformations. Pdf kinematics of faults and joints at enugu area of the. It is bounded to the north by bida basin and northern nigerian massif, to the east by benue trough, to the west by west african massif, and to the south by niger delta 14. The anambra basin, it is generally characterized by sediments of cretaceous and younger ages.
Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l. Quantitative analysis of vitrinite reflectance data from the anambra basin, nigeria, has revealed for the first time tectonism and unconformities corresponding to the campanianmaastrichtian and paleoceneeocene boundaries. Department of geology, ekiti state university, ado ekiti nigeria olaburaimo a. Analysis of the sedimentological and stratigraphical characteristics of the deposits allix, 1987 shows three main period figure 3 in the evolution of the basin. In the gongola sub basin of the northern benue trough, the pindiga formation 6, represented by the marine ka. The shaly facies grade laterally to sandstones of the owelli and afikpo formations in the anambra basin. The anambra basin is located in the southeastern part of nigeria. Pdf drainage morphology of imo basin in the anambra. What links here related changes upload file special pages permanent link page information wikidata. Kinematics of faults and joints at enugu area of the. The granulometric study of mamu formation shows fine to medium grains, coarse, medium to fine grain for mamu and ajali formation respectively.
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