Pdf geotechnical and geochemical assessments of shales. Part 1 discusses the geology of the crystalline rocks and their regional distribution while the sedimentary basins constitute the subject of part 2. Subsurface core samples obtained from enugu 25 and 31 wells within the anambra basin were utilized in this study with the aims of characterizing the organic matter as well as determining the maturity in order to. Prior to the tectonic event the anambra basin was sandstone that successively. Geology and mineral resources of nigeria nuhu george. Paleoenvironmental indications from textural parameters. Sedimentology and sequence stratigraphy of the nkporo. The study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. Anambra basin is one of the basins in nigeria, habouring the largest deposit of. The benue trough was formed by rifting of the central west african basement, beginning at the start of the cretaceous period.
Department of geology, anambra state university, uli. Paleoecology of enugu and mamu formations in anambra basin. State, anambra basin, nigeria, is bounded by latitudes 60 49i 50. 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. The oldest sediment in the anambra basin is nkporo group nwajide, 1990. The stratigraphy of the anambra basin southeastern nigeria after, ladipo, 1988 and akande et al. This could have introduced an accuracy which is beyond the original data. Formation in the adjacent anambra basin during that transgressive cycle. 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. Subsurface evaluation of source rock and hydrocarbon. 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.
Basinwide stratigraphic correlation across the anambra basin using base of the mamu. Nigeria is underlain by seven major sedimenta ry basins, viz. Evidence from field relationship and sedimentological study adeigbe, o. Geologic map of the anambra basin adopted from babatunde o.
Kinematics of faults and joints at enugu area of the anambra basin d. The basin is situated west of the lower benue trough and is. Geology and depositional environment of campanomaastrichtian sediments in the anambra basin, southeastern nigeria. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size. 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. The sokoto basin nigerian sector of the iullemmeden basin. Orient petroleum resources plc opr was established to harness the vast but mostly untapped mineral, agricultural and human resources, especially hydrocarbon deposits in anambra basin, for the industrialization of the area, improvement of the socioeconomic wellbeing of the people while creating value for the stakeholders. Most of the exposures of the lithofacies comprising the anambra sedimentary basin fill are exposed on the eastfacing scarp of the cuesta. Introduction this study examines part of the sedimentary units of the eocene nanka formation of anambra basin exposed at lat.
Contains details on the geological units of nigeria and the associated mineral resources. Several works have been carried out within the anambra basin. Scribd is the worlds largest social reading and publishing site. Part 3 takes the mineral resources of nigeria one on one, their geological environment, mode of occurrence, localities. Anambra basin is one of nigerias inland sedimentary basins, where petroleum exploration activities are presently taking place. Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite. 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.
Accepted 23 august, 2010 structural analysis of joints and fault data obtained from exposures of. Onuoha department of geology, university of nigeria, nsukka, enugu state, nigeria. Department of geology, university of port harcourt, port harcourt, nigeria. It is a nearly triangular shaped depression covering about 3000 km 2 and containing 6000 m thick cretaceous and tertiary sediments ekine and onuoha, 2008. The main oil source formations of the anambra basin, southeastern. The total aeromagnetic data covering the study area was subjected to first vertical derivative, spectral depth analysis, and source parameter imaging spi. Sedimentological attributes and stratigraphic of nanka formation, anambra basin,nigeria acra 2e.
The main oil source formations of the anambra basin, southeastern nigeria. It was deposited into the basin in late campanian, comprising nkporo shale, owelli sandstone and enugu shale reyment, 1965 and obi, 2001. Palynological and sequence stratigraphy characterization of the earlylate campanian nkporo shale, orekpekpeimiegba area, anambra basin, nigeria adebayo olajide f. The first two cycles belong to the presantonian sediments while the third cycle belongs to postsantonian sediments which are. Geochemistry and geotechnical analysis of lateritic soils. Pdf geology and depositional environment of campano. The basin is bounded to the south by the niger delta basin hinge line. 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. Anambraimo river basin development authority asked to. The mineral resources so far reported in the trough by the geological survey of nigeria agency are discussed below.
This plain is occasionally interrupted by low mesas. The late cretaceous post santonian formations present in the central parts of the anambra basin have pinched out midway into the benin flank area. Nigeria finds oil and gas in commercial quantities in anambra. P4and itiowe k5 1,5department of geology, university of port harcourt, port harcourt, nigeria 2 dept. Sedimentology and sequence stratigraphy of the eocene. Anambra basin has about 6,000 m of sedimentary rocks. Anambra river1, ihadagu1 and very scanty 2d seismic information, anambra basin is under explored. In addition to previous work done by enaworu et al. Synthetic aperture radar data were used to interpret. The iullemmeden basin in northwestern nigeria is known locally as the sokoto basin.
The basin is a nwse trending embayment, perpendicular to the main axis of the benue trough and the niger delta basin fig. Simpson 1954, reyment 1965, hogue and ezepue 1977 and ladipo 1986 have discussed the. 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. 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. Geology and mineral resources of the lower benue trough. Geotechnical and geochemical assessments of shales in anambra basin, southeastern nigeria, as landfill liners article pdf available november 2017 with 273 reads how we measure reads. Pdf the study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. Anambra basin is a cretaceous depocentre that received campanian to tertiary sediments nwajide, 1990 and obi, 2000.
Department of geology, college of physical and applied sciences, michael okpara university of agriculture, umudike, pmb 7267, umuahia, abia state. Sedimentology and geochemical evaluation of campanomaastrichtian sediments, anambra basin, nigeria. Structural controls on the evolution of the kutai basin. Earth sciences basins geology analysis cretaceous period estuaries geomorphology sediments geology. Oil seepages have also been reported from parts of the basin. Depositional environments, organic richness, and petroleum. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. It consists predominantly of a gently undulating plain with an average elevation varying from 250 to 400 m above sealevel. Sedimentology and geochemical evaluation of campano. Kinematics of faults and joints at enugu area of the. Summarized stratigraphy of the benue trough and anambra basin after. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation. Geology of cambay basin pdf the cambay rift basin, a rich petroleum province of india, is a narrow, throughout the geological history, except during early.
The anambra basin in the west of the lower region is more recent than the rest of the trough, being formed during a later period of compression, but is considered part of the formation. Department of geology, university of nigeria, nsukka, nigeria 2department of physics, university of port harcourt, port harcourt, nigeria abstract data from sixteen deep wells drilled for oil exploration purposes in the anambra basin of southeastern nigeria indicate large variations in temperature gradients and heat flow within the basin. Anambra basin showing the extension of ajali sandstone drawn from geological map of nigeria, gsn, 1994. The major elements geochemistry and compaction characteristics of lateritic soils in azagba ogwashi. 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 investigated sections consist of coarsening upward sequences with thick, dark gray shale at the base, grading upward through siltstones into. This paper analyses the paleogene and neogene evolution of the kutai basin using a combination of geophysical and. Paleoecology of enugu and mamu formations in anambra basin, southeastern nigeria onuigbo e. Exploratory activities carried out in the anambra basin have revealed that the basin has the potential of generating hydrocarbon. Geology of cambay basin pdf the cambay rift basin, a rich petroleum province of india, is a narrow, throughout the geological history, except during early syn rift stage, the. Paleoenvironmental study of paleocene to eocene sandstone in some parts of anambra basin was studied using textural parameters. Evidence from field relationship and sedimentological study. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size distribution morphologic studies. The stratigraphic setting of southern nigeria comprises sediments of three major sedimentary cycles.
Ditch cutting samples from an exploratory nzam1 well located in the northwestern part of anambra basin were subjected to lithological. This page bundles the available data for the anambra basin in the africa. Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria. It rims the western basement complex north of the area and the niger delta to the south 4. Biostratigraphy and paleoenvironment of the coniacian. 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. Palaeocene post santonian anambra basin situated on the northwest flank of the abakalilki fold belt which began to develop as a regressive offlap sequence during campanian times. Olatunji palystrat limited, ibadan nigeria madukwe, henry y department of geology, ekiti. Inset map of nigeria with outlines of geology showing the anambra basin. Controversy surrounding the stratigraphy of the anambra basin, depositional. Previous accounts of the stratigraphy of the lower benue trough such as those of reyment. 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. Pdf the study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka. M 2 6 2departmentof chemical and geological sciences, alhikmah university, ilorin, nigeria 7 3department of geology, university of ibadan, ibadan, nigeria.
The images are hyperlinks and will open up a separate window with a high resolution pdf image of the map. A case study of the paleocene to eocene sandstones in some parts of anambra basin, southeastern, nigeria. Palynology, source rock potential and thermal maturity of. Department of geology, ekiti state university, ado ekiti nigeria olaburaimo a. The basin data is derived from a lower resolution grid which has been upsampled using gmt. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. To give a concise geological description of the outcrops. Sedimentology,sequence stratigraphy,anambra basin,nanka formation and eocene. Palynologiacal and paleoenvironmental investigation of the. The marginalshallow marine nkporo group is the basal lithostratigraphic unit of the late campanianmaastrichtian successions of the anambra basin, nigeria fig.
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