Sep 22, 2017 sedimentology and geochemical evaluation of campanomaastrichtian sediments, anambra basin, nigeria. This difference they attributed to high tectonic activity in chad basin and the. Sinistrial movements along earlier existing shear faults have been proposed for their origin based on field evidence benkhelil and robineu, 1983, okoro et al. Geology and mineral resources of the lower benue trough. Imo shale is a sequence of grey shales, occasionally clay iron stones and sandstones beds, trunswell and cope, 1963 as illustrated. The elements of water budget equation were analyzed for the agulu lake area and underlying aquifers. The basin is a nwse trending embayment, perpendicular to the main axis of the benue trough and the niger delta basin fig. Kinematics of faults and joints at enugu area of the anambra basin d. During the visit, the team also inspected the 20 kilometre access road to the oil wells and the 10 kilometre flow line for evacuating crude to a spot at anambra river basin from where evacuation. Biostratigraphy and paleoenvironment of the coniacian awgu. M 2 6 2departmentof chemical and geological sciences, alhikmah university, ilorin, nigeria 7 3department of geology, university of ibadan, ibadan, 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. Textural characteristics of the siliciclasts of ajali.
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 study area is located in the southern part of the anambra basin and covers about 2200 km 2. Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria. Ogbahon, department of applied geology, federal university of. The marginalshallow marine nkporo group is the basal lithostratigraphic unit of the late campanianmaastrichtian successions of the anambra basin, nigeria fig. Basin analysis is an uptodate overview of the essential processes of the formation and evolution of sedimentary basins, and their implications for the development of hydrocarbon resources. Pdf geotechnical and geochemical assessments of shales. Geochemistry and geotechnical analysis of lateritic soils. Nigeria is underlain by seven major sedimenta ry basins, viz. Ditch cutting samples from an exploratory nzam1 well located in the northwestern part of anambra basin were subjected to lithological. Controversy surrounding the stratigraphy of the anambra basin. 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 basin is bounded to the south by the niger delta basin hinge line. Department of geology, federal university of technology, owerri, nigeria. The rocks of the basin starts with nkporo shale, ajalli sandstone, nsukka formation, imo shale, ameki sand, ogwashiasaba formation and benin formation. Foraminiferal stratigraphy and paleoecological interpretation.
This assertion is strongly criticized in the sense that going by the definition of anambra basin it. Anambraimo river basin development authority asked to. The study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. Pdf the study area lies within the anambra basin and it is made up of enugu shale, mamu. This sedimentary phase was initiated by the santonian folding and uplift of the abakaliki anticlinorium along the ne. The oldest sediment in the anambra basin is nkporo group nwajide, 1990. The flow of the anambra river is released into the atlantic through various outlets forming the 25,000squarekilometre 9,700 sq mi niger delta region.
Anambra basin has about 6,000 m of sedimentary rocks. Sedimentological attributes and stratigraphic of nanka formation, anambra basin,nigeria acra 2e. Anambra river1, ihadagu1 and very scanty 2d seismic information, anambra basin is under explored. The position of the basin relative to plate margins 3. Where the basin lies close to a plate margin, the type of plate interaction occurring during sedimentation. Evidence from field relationship and sedimentological study adeigbe, o.
This sedimentary phase was initiated by the santonian folding and. Evidence from field relationship and sedimentological study. Obala nkpume na eti mkpili, oke mmili ndu, mmili ala naazu omambala, the mystic arteryvein of the dark race. P4and itiowe k5 1,5department of geology, university of port harcourt, port harcourt, nigeria 2 dept. Basin g is a continuation of anambra basin in the northern direction. Department of geology, anambra state university, uli. Department of zoology, university of nigeria, nsukka, nigeria. To give a concise geological description of the outcrops. Geothermal gradient of the niger delta from recent studies. A consideration of the fundamental physical state of the lithosphere.
Palynofacies studies of sedimentary succession in ogbabu1. Anambra basin is one of the energyrich inland sedimentary basins in nigeria. 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. Kinematics of faults and joints at enugu area of the. Imo shale is a sequence of grey shales, occasionally clay iron stones and sandstones beds. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation. Okigwe area, geologically, lies within the anambra sedimentary basin, which. Sedimentological characteristics of ajali sandstone at okigwe. Sedimentology and sequence stratigraphy of the nkporo.
Kinematics of faults and joints at enugu area of the anambra. Adeagbo, department of geology polytechnic, ibadan. Geology and depositional environment of campanomaastrichtian. Onuoha department of geology, university of nigeria, nsukka, enugu state, nigeria. The foraminiferal assemblages comprise 86% arenaceous benthonics, 4% calcareous benthonics and 8% planktonic foraminifera. Sedimentology and geochemical evaluation of campanomaastrichtian sediments, anambra basin, nigeria. Download fulltext pdf geotechnical and geochemical assessments of shales in anambra basin, southeastern nigeria, as landfill liners article pdf available november 2017 with 273 reads. This study aimed at determining the geology and depositional environmental of these.
Sedimentology and geochemical evaluation of campano maastrichtian sediments, anambra basin, nigeriainternational journal geology and mining 32. The first two cycles belong to the presantonian sediments while the third cycle belongs to postsantonian sediments which are. Hydraulic, textural and geochemical characteristics of the. Geological map of the anambra basin and adjacent areas. 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. Palynologiacal and paleoenvironmental investigation of the. Introduction this study examines part of the sedimentary units of the eocene nanka formation of anambra basin exposed at lat. Pdf geotechnical and geochemical assessments of shales in. This study highlights the distribution of hydraulic conductivity k in the regional aquiferous ajali formation of senigeria on one hand and assesses the possible influences of textural and geochemical characteristics on the hydraulic conductivity on the other hand.
Nigeria from logs of boreholes drilled for oil that the thermal gradient for chad basin ranges between 3. Foraminiferal investigation of the kolmani river 1 well yielded a total of forty two 42 species. Biostratigraphy and paleoenvironment of the coniacian. The stratigraphic setting of southern nigeria comprises sediments of three major sedimentary cycles. The investigation approach involved field sampling and collection of 12 sandstone samples from different outcrop locations. 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. Anambra basin has about 6,000m thick of sedimentary rocks. Nwajide cs, reijers tja 1996 anambra basin excursion guide. Anambra basin is a cretaceous depocentre that received campanian to tertiary sediments nwajide, 1990 and obi, 2000. The stratigraphic succession of each region was established and correlated across the basin and to the adjoining anambra basin. Petrogeologist study geology to find mine, coal, or oil deposit. It is accessible by motorable roads and footpath, especially those. Excitement as orient petroleum strikes oil in anambra.
Geology is an interesting subject in knowing history of earth creation, creature evolution, ancient earth life and earth condition in the past. Anambra basin showing the extension of ajali sandstone drawn from geological map of nigeria, gsn, 1994. Free geology books download ebooks online textbooks. The geology of nigeria is made up of three major lithopetrological components, namely, the basement complex. Trace fossils from the campanian maastrichtian enugu formation. The indogangetic basin is the largest alluvial tract in the world. State, anambra basin, nigeria, is bounded by latitudes 60 49i 50. Sedimentology and sequence stratigraphy of the eocene nanka. Foraminiferal stratigraphy and paleoecological interpretation of sediments penetrated by kolmani river 1 well, gongola basin, nigeria. Subsurface evaluation of source rock and hydrocarbon. Uzoegbu and okon 127 accepted 28 august, 2017 citation.
Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite. It was deposited into the basin in late campanian, comprising nkporo shale, owelli sandstone and enugu shale reyment, 1965 and obi, 2001. Maastrichtian age has been recorded in the anambra basin. Evaluation of swelling and slaking characteristics of shales from. Nigeria finds oil and gas in commercial quantities in anambra. Sedimentology and sequence stratigraphy of the nkporo group. Geology and mineral resources of the lower benue trough, nigeria. Sedimentology,sequence stratigraphy,anambra basin,nanka formation and eocene.
Oil seepages have also been reported from parts of the basin. Previous accounts of the stratigraphy of the lower benue trough such as those of reyment. Sedimentology and geochemical evaluation of campano. The total aeromagnetic data covering the study area was subjected to first vertical derivative, spectral depth analysis, and source parameter imaging spi. Geology and geohydrology of the palo duro basin, texas panhandle. Most of the exposures of the lithofacies comprising the anambra sedimentary basin fill are exposed on the eastfacing scarp of the cuesta. Obi department of geology, anambra state university, uli, nigeria abstract integration of sedimentologic and sequence stratigraphic interpretations of the nkporo group has provided the basis for a basin wide framework for prediction of potential. Sedimentological characteristics of ajali sandstone at. 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. Simpson 1954, reyment 1965, hogue and ezepue 1977 and ladipo 1986 have discussed 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. Water budget analysis of agulu lake in anambra state, nigeria.
It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. Sedimentology and sequence stratigraphy of the eocene. The paleoenvironments, biostratigraphy and petroleum geology of the anambra basin have attracted the attention of many authors. Geochemical evaluation of okaba odagbo coal deposit. The basin is bounded to the south by the niger delta hinge line. Gravity models as tool for basin boundary demarcation. Dept of applied biology ebonyi state university abakiliki ebonyi state, nigeria received 03iv2008. Department of geology, college of physical and applied sciences, michael okpara university of agriculture, umudike, pmb 7267, umuahia, abia state. Pdf geology and depositional environment of campano. Geology and depositional environment of campanomaastrichtian sediments in the anambra basin, southeastern nigeria. Depositional environment of siliciclastic deposits on the western.
Agagu and ekweozor 1982 reported that the awgu and. The main oil source formations of the anambra basin. Earth sciences basins geology analysis cretaceous period estuaries geomorphology sediments. The main oil source formations of the anambra basin, southeastern nigeria. It is a product of stresses consequent upon movement along the fracture zones associated with the benue trough amogu et al. A discussion on the major types of lithospheric deformation relevant to basin development. The anambra river flows 210 kilometres mi into the niger river and is found in anambra, nigeria.
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. It extends northwestward into the niger valley, northward to the jos massif and northeastward as far as lafia. Depositional environments, organic richness, and petroleum. Sedimentary succes sions in these basins are of middle mesozoic to recent age. A sequence stratigraphic model for the group was developed by nwajide and reijers 1996, on the basis of stratigraphic analysis of a composite section located at leru, near okigwe. Water budget analysis of agulu lake in anambra state, nigeria 1egboka, bce. The matrix is composed poorly sorted, medium to coarsegrand, mudfree quartzose sand.
In addition to previous work done by enaworu et al. The investigation approach involved field sampling and collection of 12 sandstone samples from. Accepted 23 august, 2010 structural analysis of joints and fault data obtained from exposures of the enugu and mamu formations. 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. 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. It is accessible by motorable roads and footpath, especially those created by the villagers to fetch water from the pond. The major elements geochemistry and compaction characteristics of lateritic soils in azagba. The river is the most important feeder of the river niger below lokoja. Geology department, federal university of technology, minna, nigeria abstract 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. Few ostracod and gastropods shells were recovered and they make up the remaining 2% of the assemblages. Earth sciences basins geology analysis cretaceous period estuaries geomorphology sediments geology.