A structural basin is a largescale structural formation of rock strata formed by tectonic warping of previously flatlying strata. The shale and mudstone beds are light grey to dark grey in colour and bioturbated. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size distribution morphologic studies. Geological map of the anambra basin and adjacent areas. The basin is bounded to the south by the niger delta basin hinge line.
French creek provided most of the irrigation for the ranch, and runs along the base of the bighorns. The shaly facies grade laterally to sandstones of the owelli and afikpo formations in the anambra basin. This study aimed at determining the geology and depositional environmental of these formations through field. A stratigraphic section of the powder creek basin can be found at the wyoming geological survey website. Bhima basin the ne trending irregularly sinous bhima basin fig.
Part 3 takes the mineral resources of nigeria one on one, their geological environment, mode of occurrence, localities. Nigerias frontier basinsunrealized rift system hydrocarbon. Of the four, only the dahomey basin has yielded commercially viable oil and gas deposits, as well as the vast undeveloped bitumen discoveries adegoke. Contains details on the geological units of nigeria and the associated mineral resources. 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. Regional framework, structural and petroleum aspects of. 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. Nigeria finds oil and gas in commercial quantities in anambra. With less than 50 wells so far drilled two discoveries. Agagu and ekweozor 1982 shows that the awgu and nkporo shales constitute the main source and seal rocks in the anambra basin. Subsurface evaluation of source rock and hydrocarbon. The volcanic rocks of the mogollondatil field predominate. The lithological succession in east kutai basin, east kalimantan, indonesia. 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.
Of the nine rift basins in nigeria, hydrocarbons have been discovered in only four anambra basin, dahomey basin, southern bornu basin, and the gongola basin yola arm of the upper benue trough. Sedimentological attributes and stratigraphic of nanka formation, anambra basin,nigeria acra 2e. Burnside pennsylvanian and lower permian rocks of parts of west and central texas geological survey professional paper 315b prepared in cooperation with the bureau of economic geolovy of the university of texas united states government printing office, washington. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size.
Seismic geohistory and differential interformational velocity analysis in the anambra basin, nigeria. The investigation approach involved field sampling and collection of 12 sandstone samples from different outcrop locations. Oil seepages have also been reported from parts of the basin. This map also provides an interpretation of bedrock geology based on geo. Department of geology, faculty of physical sciences, university of benin, benincity, nigeria correspondence. Structural controls on the evolution of the kutai basin, east. Preliminary assessment of source rock potential and palynofacies analysis of maastrichtian dark shale, sw anambra basin edegbai, a. Basin size, areal extent of portion of basin below 4.
The basin data is derived from a lower resolution grid which has been upsampled using gmt. Matriculation number 142332, of the department of geology, faculty of science, university of. Earlier work began with the investigation of tectonism in the southern nigeria. Geophysical and geological evidence for the benuechad. Subsistence of the anambra plate due to folding and uplift of the abakalikibenue fold belt in the santonian stage produces the anambra basin. Accepted 23 august, 2010 structural analysis of joints and fault data obtained from exposures of. Hydraulic, textural and geochemical characteristics of the. Geology of the continental margin beneath santa monica bay. Table of contents introduction location ofthe basin geology of the basin tectonichistory petroleum potentialof the basin conclusion a basinisa depressiononthe earthssurface relative tosurroundings. The paleoenvironments, biostratigraphy and petroleum geology of the anambra basin have attracted the attention of many authors.
Sedimentology and sequence stratigraphy of the eocene. Geology of part of the horseshoe atoll in borden and. Geology and mineral resources of nigeria nuhu george. The images are hyperlinks and will open up a separate window with a high resolution pdf image of the map. Muglad basin in suda the anza basin, kenya of kenya, 1990, as wel the benue basin poi niger rifts faure, 191 20 16 fig. Geology of the continental margin beneath santa monica bay, southern california, from seismicre. The study area lies within latitudes 50155055n and longitudes 70156055e, in the anambra basin. Kinematics of faults and joints at enugu area of the. Palynomorphs distribution, biostratigraphy and paleoecology study. Structural basins may also be sedimentary basins, which are aggregations of sediment that filled up a depression or accumulated. The investigation approach involved field sampling and collection of 12 sandstone samples from different outcrop. Depositional environments, organic richness, and petroleum. Geology and natural gas potential of deep sedimentary. It is accessible by motorable roads and footpath, especially those created by the villagers to fetch water from the pond.
Agagu and ekweozor 1982 reported that the awgu and. The formation comprises a heterolithic succession of wave ripple laminated and fine grained sandstone, alternating with thin beds of shale, mud laminated sandstone, mudstone and coal beds. The type of rocks which form there tell about the palaeoclimate of the continent. Biostratigraphy and paleoenvironment of the coniacian awgu. The geology is of interest to oil prospectors, hydrologists and palaeontologists.
Paleoecology of enugu and mamu formations in anambra basin. Part 1 discusses the geology of the crystalline rocks and their regional distribution while the sedimentary basins constitute the subject of part 2. Geologic setting and stratigraphy the geology of the anambra basin has been well studied and documented. Sedimentology,sequence stratigraphy,anambra basin,nanka formation and eocene. Nigeria is underlain by seven major sedimenta ry basins, viz. Pdf geology and depositional environment of campano. Pdf the palynological study of the northern section of the anambra basin at. Horseshoe atoll in borden and howard counties, texas by r. Late cenozoic gravels found in extensional basins record recent 15 ma geologic history of the region and are the best aquifers. The geology of the lower benue trough has been documented through the tectonosedimentary studies of murat 1972, nwachukwu 1972, olade 1975 and agagu and adighije 1983 and for the anambra basin by agagu et al. To give a concise geological description of the outcrops.
Sedimentology and sequence stratigraphy of the eocene nanka. Department of geology, anambra state university, uli. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Introduction this study examines part of the sedimentary units of the eocene nanka formation of anambra basin exposed at lat. Paleogeography, sedimentation and tectonics of the upper.
The coincidence of movement on the faults and the growth of the anticlines as the sediment was deposited resulted in ideal conditions for subsequent entrapment of hydrocarbons. Geology and natural gas potential of deep sedimentary basins. It extends northwestward into the niger valley, northward to the jos massif and northeastward as far as lafia. Jul 09, 2009 contains details on the geological units of nigeria and the associated mineral resources.
Water budget analysis of agulu lake in anambra state, nigeria. Geology and total petroleum systems of the westcentral. Within the anambra basin, some structural styles such as hanging walls, footwalls, horst block and collapsed crest structures. Geological map of the benue trough nigeria and cameroon after. The study area is located in the southern part of the anambra basin and covers about 2200 km 2. Sedimentology and sequence stratigraphy of the nkporo group. Biostratigraphy and paleoenvironment of the coniacian. Article pdf available in earth sciences research journal. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria. Rio muni basin cabo san juan arch annoboncameroon volcanic axis kinshasa bangui central african republic niger delta w a l vis ridge angola cabinda namibe basin geology and total petroleum systems of the westcentral coastal province 7203, west africa u.
Palynologiacal and paleoenvironmental investigation of the. Onuoha department of geology, university of nigeria, nsukka, enugu state, nigeria. General geological map showing main sedimentary basins of nigeria, selected growth faults and general structural data. Geological basins are one of the two most common places inland which collect sediment the other is lakes. Jun 05, 20 french creek provided most of the irrigation for the ranch, and runs along the base of the bighorns. Ladtpo department of geology and mlnera sciences university of llorln p. Basin geology simple english wikipedia, the free encyclopedia. Kinematics of faults and joints at enugu area of the anambra. The main oil source formations of the anambra basin, southeastern nigeria. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation.
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. Basin analysis and petroleum systems modeling of the. Pdf seismic geohistory and differential interformational velocity. The mamu formation is the coalbearing stratigraphic unit of the anambra basin. Index map of niger delta and offshore nigeria showing the anambra basin and abakaliki fold belt after doust and omatsola, 1989.
Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite. This could have introduced an accuracy which is beyond the original data. The petroleum geology, biostratigraphy and paleoenvironmental description of anambra basin have been carried out by many authors. The hartford deerfield basin, a late triassic to early jurassic rift basin in central connecticut and massachusetts, is the northernmost of the onshore mesozoic rift basins in the eastern united states. Geology and palaeogeography of borneo wilson and moss 1999 provided a detailed overview of the geology of borneo, and. Geology and mineral resources of nigeria nuhu george obaje. The basin is bounded to the south by the niger delta hinge line. Review of the geology of bornu basin article pdf available in journal of mining and geology 312. Structural basins are geological depressions, and are the inverse of domes. Sedimentation in the anambra basin thus commenced with the early campanian early maastrichtian of the enugu and nkporo formations lateral equivalents which consist of a sequence of bluish to dark grey shale and mudstone locally with sandy shales, thin sandstones and shelly limestone beds. Palaeoenvironments of borneo geology and palaeogeography. The delta is cut by a homogenous sequence of downtothe basin faults trending northwest and southeast, similar in length and remarkably equidistant from each other.
Basin classification geology and natural gas potential of deep sedimentary basins in the former soviet union north caspian northern part of caspian sea 518,000 middle caspian eastern part of north caucasus 430,000 west sib. Accepted 23 august, 2010 structural analysis of joints and fault data obtained from exposures of the enugu and mamu formations. The main oil source formations of the anambra basin. Basement geology and structure tertiary rocks of the kutai basin rest with angular unconformity upon a basement of mesozoic and older strata. Conclusion the gila drainage basin in new mexico is underlain by rocks from proterozoic to recent in age. Some elongated structural basins are also known as synclines. State, anambra basin, nigeria, is bounded by latitudes 60 49i 50. The marginalshallow marine nkporo group is the basal lithostratigraphic unit of the late campanianmaastrichtian successions of the anambra basin, nigeria fig. Structural controls on the evolution of the kutai basin. Review of the geology of bornu basin article pdf available. The gila drainage basin in new mexico is underlain by rocks from proterozoic to recent in age. Evidence from field relationship and sedimentological study.
The delta is cut by a homogenous sequence of downtothebasin faults trending northwest and southeast, similar in length and remarkably equidistant from each other. Geological map of anambra basin showing the area of study modified after. Kinematics of faults and joints at enugu area of the anambra basin d. The presence of asphaltic petroleum in outcrops indicates that at least one active petroleum system has existed within the basin. This page bundles the available data for the anambra basin in the africa. Sedimentary succes sions in these basins are of middle mesozoic to recent age.
Geology and depositional environment of campanomaastrichtian sediments in the anambra basin, southeastern nigeria. Geology and mineral resources of the lower benue trough. The geology and geotechnology of the keta basin with. The base of this zone is the same as the top of zone ii. The study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. Geophysical and geological evidence for the benuechad basin. It overlies the granitic basement of eastern dharwar craton with a profound unconformity and has faulted contacts at many places. It is often below sea level geological basins are one of the two most common places inland which collect sediment the other is lakes.
A common type of rock found in this basin is called scoria colloquially known as red dog. Most of the exposures of the lithofacies comprising the anambra sedimentary basin fill are exposed on the eastfacing scarp of the cuesta. General geology the chad basin occupies a vast area at an altitude of. Of the nine rift basins in nigeria, hydrocarbons have been discovered in only four anambra basin, dahomey basin, southern bornu basin, and the gongola basinyola arm of the upper benue trough. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. The relatively unfavourable geology of the area has made the design of effective coastal defense measures difficult.
950 1017 320 1116 1273 916 295 2 145 1045 724 1364 293 274 1523 807 1460 313 1109 1227 819 86 309 255 71 1033 34 1485 1122 130 824 1114 66 1524 256 713 1049 1300 419 586 1117 1240 627 328 66