Test results are sent to the tri basin nrd office, where they are recorded in a water quality database. The depositional environments and provenance characteristics. Generally, species nomenclature for dinoflagellate cysts followed fensome and williams 2004. Petsanimals dogs are allowed for hunting migratory birds, squirrels. A faulted basement high, the okitipupa basement ridge separated the dahomey embayment from the benue trough until the late cretaceous subsidence and marine transgression united both basins. Petrography and geochemical indices of the lagos lagoon. With less than 50 wells so far drilled two discoveries. Evidence from field relationship and sedimentological study adeigbe, o. Composition characteristics and industrial assessment of sedimentary clay bodies in part of eastern dahomey basin. There are precambrian rocks in the tibesti mountains in the north and the east whilst in eastern chad are basement rocks, some of which extend into darfur in neighbouring sudan granitic gneiss and peliticgraphitic schists. Please contact the complex headquarters for more information. Outcrop analog are important tools for better understanding of large scale seismic features such as slope deposits and structures.
The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. 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. The geology of nigeria as described by obaje 1, comprises of three litho petrological. The basin is bounded to the south by the niger delta basin hinge line. Computers and software may import the data without transcription from the portable document format files. The results are then forwarded to the home owner, along with information about protecting water quality. Since 2007, six out of eight wells have been positive. It is separated from the niger delta by a subsurface basement high referred to as the okitipupa ridge. The dahomey basin evolved in the late jurassic early cretaceous as a result of the separation of. Palynology and paleoenvironments of the upper araromi formation, dahomey basin, nigeria. Although much of the lands along the noyyal river basin run along the rain shadow are, still receiving considerable rainfall which could be utilized well. Pectographic study of carbonate sediments around yewa river. Palynology and paleoenvironments of the upper araromi.
Petrographic studies and paleoenvironmental reconstruction of. The basin is a marginal pullapart basin klemme, 1975 which developed in. The studied xformation is one of the paleocene strata bearing marine macrofossils. Pdf estimation of the depth to magnetic basement in part of. Subsidence patterns in the nigerian sector of benin dahomey basin. This study, completed basin in 1982, was initiated by the missouri river basin commission, later to be known as the missouri basin states association mbsa. In the republic of benin, the geology is fairly well known billman, 1976. Recently proposed plans for oil and gas drilling in the galisteo basin sparked concerns about the impacts that such activities could have on the basins unique resources.
Aquifer vulnerability assessment of the dahomey basin. The dahomey basin is an extensive sedimentary basin on the continental margin of the gulf of guinea. The paleoceneearly eocene foraminiferal biostratigraphy. Pdf aquifer vulnerability assessment of the dahomey. The basin is a marginal pullapart basin klemme, 1975 which developed in the. Chemistry and materials research issn 2224 3224 print issn 2225 0956 online vol 2, no. The shales are grey to dark grey and well laminated. Water flow in the river basin occurs during the monsoon.
Integrating airborne magnetic and landsat data for. Aquifer vulnerability assessment of the dahomey basin using. Regional map of four countries showing the location of the benin dahomey basin in the gulf of guinea modified from brownfield and chapentier, 2006. For dinoflagellates and acritarchs, monographs of powell 1992, jan du chene 1987 and sluijs et al. This paper presents the theory and application of rainfall and travel time rtt vulnerability method. Geophysical and geological evidence for the benuechad. Generally, the coastal plain sands and recent alluvium of the dahomey basin, south western nigeria, underlie the lagos area. For more information on this program, please contact tribasin nrd at 308 9956688 or 18779956688. Shales belonging to the oshosun formation exposed at the sagamu quarry of the west african portland cement have been mapped and assessed for their abundances in rare earth elements ree. Nigerian association petroleum explorationists, 7, 121. Generalized stratigraphic column showing age, lithology, and sequence of the formations and tectonic stage of basin development in the nigerian sector of the benin basin 3.
Because we focus on the liberian and dahomey basins, let us expand more on the geology of the upper part. The dahomey basin is a very extensive sedimentary basin that extends from southeastern ghana in the west. 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. Pdf aquifer vulnerability assessment of the dahomey basin.
Apr 30, 2009 the dahomey basin is a combination of inland coastal offshore basin that stretches from southeastern ghana through togo and the republic of benin to southwestern nigeria. Test results are sent to the tribasin nrd office, where they are recorded in a water quality database. Louis centre geologique et geophysique, universite des sciences, 34060 montpellier, france and d. Other subsequent workers recognized three chronostratigraphic units. The dahomey basin constitutes an integral part of the geologic history of west africa, which evolved during late jurassic to early cretaceous at the start of the rifting and associated with the opening of the gulf of guinea2. Introduction a proper understanding of modern sedimentary environment is based mainly on three parameters which are their physical, chemical and biological characteristics. A faulted basement high, the okitipupa basement ridge separated the dahomey embayment from the benue trough until the late cretaceous subsidence and. Geological map of dahomey basin in the nigerian sector and the states located on the basin modified after 1. The lagoon is about 50 km long, between 3 km and km wide, with a depth ranging from 3 m in most parts to 12 m. Basin research basinevolutionofuppercretaceous lower. The geology of chad includes an area of metamorphic rocks of precambrian age surrounding the chad basin which is floored with tertiary and quaternary sediments. Quaternary sediments of the lagos coastal lagoon in nigeria lie within the dahomey basin, located in the southwestern part of the country adegoke, 1969. Feb 23, 20 chemistry and materials research issn 2224 3224 print issn 2225 0956 online vol 2, no. Many of the sequence stratigraphy ideas developed by john and the exxon team were based on field work in the book cliffs of utah and colorado, the powder river basin in wyoming, and the san juan basin in new mexico.
This group is the thickest sedimentary unit within the basin. The dahomey benin embayment is part of a system of west african pericratonic margin sag basin 14, covering much of the continental margin of the gulf of guinea, extending from voltadelta in ghana on the west to the okitipupa ridge in nigeria on the east figure 1. Extending across the turkeyarmenian border, this basin documents the syn and. Pdf the dahomey basin is an amalgamation of inlandcoastaloffshore basin. The paleoceneearly eocene foraminiferal biostratigraphy of. Geology, lithospheric structure and tectonics of the basin are only partially. Recently proposed plans for oil and gas drilling in the galisteo basin sparked concerns about the impacts that such activities could. The study area is located within the eastern part of dahomey basin between latitude 6o 40n to 6o 55n and longitude 3o 47n to 4o 19n accessible by major roads fig 1.
The slides, residues, unprocessed samples, cd copies and duplicate prints are in the palynological collections of the biological sciences department, redeemers university, mowe. This knowledge will aid the understanding of the geology of the basin and its resources. The dahomey basin is a very extensive sedimentary basin that extends from southeastern ghana in the west to the western flank of niger delta in nigeria. River basin, formed work teams to evaluate the effects of depletions on streamflows in the missouri river. The studies conducted in this basin includes exploration for petroleum by oil companies 19541961 which led to the drilling of bodashe1 well, illepaw 1 well, afowo1 well and ojo19 well fayose, 1970.
Recent discoveries offshore douala basin the offshore sector of the douala basin is currently experiencing a revival in exploration activity. Pdf estimation of the depth to magnetic basement in part. The galisteo basin contains some of new mexicos most unique and irreplaceable archaeological, cultural, water and other natural resources. It extends from south eastern ghana through togo and benin republic into western nigeria slansky, 1962, antolini 1968, billman 1972. Biostratigraphic studies of x 1 and x 2 boreholes,xformation, dahomey basin nigeria. Half of them succeeded in finding hydrocarbons, mainly gas and condensate in miocene sandstone reservoirs. Electrical resistivity imaging eri of slope deposits and.
The analysis of the sedimentary fills in a basin provides clues to the conditions prevalent during its evolutions. Heavy minerals and mineralogical composition of subsurface. Cratchley institute of geological sciences, exhibition road, south kensington, london sw7, u. Large reserves of tar sands containing 40 bbl of heavy oil are reservoired in poorly sealed sandstones of the campanian maastrichtian araromi formation in the basin. The shale thickness, which measures approximately 15m and overlies the ewekoro formation is separated by a very thin bed of glauconite. Dahomey basin, provenance, heavy minerals, and mineralogical composition.
Geophysical and geological evidence for the benuechad basin cretaceous rift valley system and its tectonic implications c. Additionally, he has worked extensively in the brent and statfjord formations on both the u. These could be related to a number of features in the study area including its. Geology and total petroleum systems of the westcentral. Petrographic studies and paleoenvironmental reconstruction.
Sedimentary exposures at ijebu omu, itele and ijebu ife, all within the eastern part of dahomey basin, southwest nigeria were imaged using electrical geophysical method with the aim of reconstructing the geological history of the area and providing a basis for. Geology and petroleum systems of the offshore benin basin. The method is applied on a shallow aquifer in the dahomey basin of southwestern nigeria with the results being compared to other established vulnerability assessment methods. The assessment of potential source rocks of maastrichtian araromi. The geology of nigeria as described by obaje 1, comprises. Devils dry lake lake irvine lake alice stump lake east devils lake rock lake sweetwater lake hurricane lake morrison lake long lake mud lake lake isben cranberry. Petrological and geochemical evaluation of the paleocene. Nigeria is underlain by seven major sedimenta ry basins, viz. Anambra river1, ihadagu1 and very scanty 2d seismic information, anambra basin is under explored. Geology and petroleum systems of the offshore benin basin benin c.
Pectographic study of carbonate sediments around yewa. The frontier cotonou basin or dahomeybenin embayment, situated west of the. The dahomey basin is a very extensive sedimentary basin. The boreholes were drilled in the central part of the xformation, dahomey basin and was drilled up to the depth of 70ft. Parker disclaimer the development of this material has been funded by usaid southern africa. Amelina 0 0 beninese company of hydrocarbon cbh 01 bp 8060 cotonou, benin 1 university of abomeycalavi, 01 bp 526 cotonou, benin geology and petroleum systems of the offshore benin basin benin this paper. It stretches from voltadelta southeastern ghana through togo and. A mobility impaired hunter is defined as a person 1 permanently confined to a wheelchair, crutches, or a walker or 2 a single or doubleleg amputee. Pdf geology and petroleum systems of the offshore benin. Preliminary investigation of the rare earth element ree. Dahomey basin ranges from continental to oceanic crust. Omatsola and adegoke 1981 on the lithostratigraphy of dahomey basin recognized 3 formations belonging to the abeokuta group based on lithologic homogeneity and similarity of origin. Geological map of dahomey basin in the nigerian sector and the states located on the basin 3. However, the sedimentary successions in these basins are broadly divisible into.
The dahomey benin embayment is part of a system of west african pericratonic margin sag basin14, covering much of the continental margin of the gulf of guinea, extending from voltadelta in ghana on the west to the okitipupa ridge in nigeria on the east figure 1. The dahomey basin is a combination of inland coastal offshore basin that stretches from southeastern ghana through togo and the republic of benin to southwestern nigeria. Electrical resistivity imaging eri of slope deposits and structures in some parts of eastern dahomey basin author. Depositional facies and sequence stratigraphic study in. It is subdivided into three formations, namely, from the oldest to the youngest. Because of the number and variety of platforms and software available, graphical images are provided as. Biostratigraphic studies of x and x boreholes,xformation. Benin basin dahomey embayment is bounded in the west by the ghana ridge which is an extension of the romanche fracture zone and the east by the benin hinge line, a basin escarpment which separates the okitipupa structure from the niger delta basin and marks the continental extension of. The benin dahomey basin is a rift related cretaceous tertiary depocenter contiguous with the ivory coast, tano, saltpond, and keta basins in the gulf of guinea. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. The basin cov ers over 2,345 square kilometres with approximately 52 percent within honduras and 48 percent.
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