Pdf aquifer vulnerability assessment of the dahomey. 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 dahomey basin is an extensive sedimentary basin on the continental margin of the gulf of guinea. Palynology and paleoenvironments of the upper araromi formation, dahomey basin, nigeria. For dinoflagellates and acritarchs, monographs of powell 1992, jan du chene 1987 and sluijs et al. 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.
Nigeria is underlain by seven major sedimenta ry basins, viz. The paleoceneearly eocene foraminiferal biostratigraphy. The dahomey basin is a very extensive sedimentary basin that extends from southeastern ghana in the west. The results are then forwarded to the home owner, along with information about protecting water quality. 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. Test results are sent to the tribasin nrd office, where they are recorded in a water quality database. Heavy minerals and mineralogical composition of subsurface. The paleoceneearly eocene foraminiferal biostratigraphy of. Nigerian association petroleum explorationists, 7, 121. Evidence from field relationship and sedimentological study adeigbe, o. It is subdivided into three formations, namely, from the oldest to the youngest.
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. 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. The basin is a marginal pullapart basin klemme, 1975 which developed in. This group is the thickest sedimentary unit within the basin. Geophysical and geological evidence for the benuechad basin cretaceous rift valley system and its tectonic implications c. 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. The frontier cotonou basin or dahomeybenin embayment, situated west of the. 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. Recent discoveries offshore douala basin the offshore sector of the douala basin is currently experiencing a revival in exploration activity. In the republic of benin, the geology is fairly well known billman, 1976. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. For more information on this program, please contact tribasin nrd at 308 9956688 or 18779956688. Introduction a proper understanding of modern sedimentary environment is based mainly on three parameters which are their physical, chemical and biological characteristics. For more information on this program, please contact tri basin nrd at 308 9956688 or 18779956688.
Chemistry and materials research issn 2224 3224 print issn 2225 0956 online vol 2, no. Dahomey basin, provenance, heavy minerals, and mineralogical composition. Please contact the complex headquarters for more information. Pdf aquifer vulnerability assessment of the dahomey basin. Geophysical and geological evidence for the benuechad.
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. The assessment of potential source rocks of maastrichtian araromi. 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 slides, residues, unprocessed samples, cd copies and duplicate prints are in the palynological collections of the biological sciences department, redeemers university, mowe. Other subsequent workers recognized three chronostratigraphic units. 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. Dahomey basin ranges from continental to oceanic crust. Biostratigraphic studies of x 1 and x 2 boreholes,xformation, dahomey basin nigeria. Subsidence patterns in the nigerian sector of benin dahomey basin. The shales are grey to dark grey and well laminated. Electrical resistivity imaging eri of slope deposits and structures in some parts of eastern dahomey basin author. A faulted basement high, the okitipupa basement ridge separated the dahomey embayment from the benue trough until the late cretaceous subsidence and. Basin research basinevolutionofuppercretaceous lower. This is an arcuate coastal basin, the onshore parts of which underlie the coastal plains of southwest nigeria, benin and togo.
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. 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 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. 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. Computers and software may import the data without transcription from the portable document format files. Pdf estimation of the depth to magnetic basement in part. Profile of noyyal river basin 56 shortage or shortage of water for industrial and agricultural purposes. The boreholes were drilled in the central part of the xformation, dahomey basin and was drilled up to the depth of 70ft.
Pdf the dahomey basin is an amalgamation of inlandcoastaloffshore basin. 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. This knowledge will aid the understanding of the geology of the basin and its resources. The analysis of the sedimentary fills in a basin provides clues to the conditions prevalent during its evolutions. Palynology and paleoenvironments of the upper araromi. 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. It stretches from voltadelta southeastern ghana through togo and. The galisteo basin contains some of new mexicos most unique and irreplaceable archaeological, cultural, water and other natural resources. 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. Test results are sent to the tri basin nrd office, where they are recorded in a water quality database. The dahomey basin is an arcuate extensive basin located within the gulf of guinea, west africa figure 1. Geological map of dahomey basin in the nigerian sector and the states located on the basin modified after 1.
Petrographic studies and paleoenvironmental reconstruction of. Aquifer vulnerability assessment of the dahomey basin using. Anambra river1, ihadagu1 and very scanty 2d seismic information, anambra basin is under explored. 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. Generally, the coastal plain sands and recent alluvium of the dahomey basin, south western nigeria, underlie the lagos area. 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. Because of the number and variety of platforms and software available, graphical images are provided as. The dahomey basin evolved in the late jurassic early cretaceous as a result of the separation of. Because we focus on the liberian and dahomey basins, let us expand more on the geology of the upper part. These could be related to a number of features in the study area including its.
Aquifer vulnerability assessment of the dahomey basin. The depositional environments and provenance characteristics. 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. Geology and petroleum systems of the offshore benin basin benin c. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Since 2007, six out of eight wells have been positive. 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. 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. 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.
The basin is bounded to the south by the niger delta basin hinge line. Geology and petroleum systems of the offshore benin basin. Louis centre geologique et geophysique, universite des sciences, 34060 montpellier, france and d. The shale thickness, which measures approximately 15m and overlies the ewekoro formation is separated by a very thin bed of glauconite. Petsanimals dogs are allowed for hunting migratory birds, squirrels. Composition characteristics and industrial assessment of sedimentary clay bodies in part of eastern dahomey basin. Geological map of dahomey basin in the nigerian sector and the states located on the basin 3. Electrical resistivity imaging eri of slope deposits and. The basin is a marginal pullapart basin klemme, 1975 which developed in the. 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. Quaternary sediments of the lagos coastal lagoon in nigeria lie within the dahomey basin, located in the southwestern part of the country adegoke, 1969. Pectographic study of carbonate sediments around yewa river. Depositional facies and sequence stratigraphic study in.
Petrography and geochemical indices of the lagos lagoon. Additionally, he has worked extensively in the brent and statfjord formations on both the u. Feb 23, 20 chemistry and materials research issn 2224 3224 print issn 2225 0956 online vol 2, no. 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. With less than 50 wells so far drilled two discoveries. Integrating airborne magnetic and landsat data for. However, the sedimentary successions in these basins are broadly divisible into. 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, lithospheric structure and tectonics of the basin are only partially.
Generally, species nomenclature for dinoflagellate cysts followed fensome and williams 2004. The basin cov ers over 2,345 square kilometres with approximately 52 percent within honduras and 48 percent. 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. 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. Pdf estimation of the depth to magnetic basement in part of. It is separated from the niger delta by a subsurface basement high referred to as the okitipupa ridge.
It extends from south eastern ghana through togo and benin republic into western nigeria slansky, 1962, antolini 1968, billman 1972. Biostratigraphic studies of x and x boreholes,xformation. Cratchley institute of geological sciences, exhibition road, south kensington, london sw7, u. Composition characteristics and industrial assessment of sedimentary clay bodies in. The geology of nigeria as described by obaje 1, comprises of three litho petrological. River basin, formed work teams to evaluate the effects of depletions on streamflows in the missouri river. Generalized geology of the dahomey basin modified by billman, 1976 the abeokuta formation is the oldest formation in the dahomey basin. Pectographic study of carbonate sediments around yewa. Geology and total petroleum systems of the westcentral. 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. Estimation of the depth to magnetic basement in part of the dahomey basin, southwestern nigeria article pdf available in australian journal of basic and applied sciences 59.
The studied xformation is one of the paleocene strata bearing marine macrofossils. Petrological and geochemical evaluation of the paleocene. The geology of nigeria as described by obaje 1, comprises. Preliminary investigation of the rare earth element ree. This paper presents the theory and application of rainfall and travel time rtt vulnerability method. Half of them succeeded in finding hydrocarbons, mainly gas and condensate in miocene sandstone reservoirs. Outcrop analog are important tools for better understanding of large scale seismic features such as slope deposits and structures. Regional map of four countries showing the location of the benin dahomey basin in the gulf of guinea modified from brownfield and chapentier, 2006. Pdf geology and petroleum systems of the offshore benin. The method follows the source pathway receptor concept of aquifer vulnerability assessment where rainfall represents.
Water flow in the river basin occurs during the monsoon. Recently proposed plans for oil and gas drilling in the galisteo basin sparked concerns about the impacts that such activities could. The dahomey basin is a very extensive sedimentary basin. Parker disclaimer the development of this material has been funded by usaid southern africa.
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