Geological map of dahomey basin in the nigerian sector and the states located on the basin 3. The dahomey basin is a very extensive sedimentary basin that extends from southeastern ghana in the west. This basin contributes significantly to the water resources of nigeria and is also the major source of freshwater supply to various households. General geology the benin dahomey basin is a very extensive sedimen tary basin. The dahomey basin, sw nigeria, hosts a 3000mthick sedimentary succession of cretaceous and cenozoic age, of which the turonianmaastrichtian afowo formation includes sandstones, arkoses, shales, shelly limestones, unconsolidated sand, clay and most importantly, bituminous tar sand strata. Feb 23, 20 chemistry and materials research issn 2224 3224 print issn 2225 0956 online vol 2, no. It is part of a system of west african margin basins developed during the period of the rifting associated with the separation of south american and african plates and subsequent. The depositional environments and provenance characteristics. Integrating airborne magnetic and landsat data for. Palynology and paleoenvironments of the upper araromi. Geochemical and organic petrological study of bituminous. The dahomey basin is a marginal pullapart klemm, 1975 or marginal sag basin kingston et al.
Voltaian basin geographical region, ghana britannica. Geology of the eastern dahomey basin with emphasis on the geology of the oil sands of ogun. Source to reservoir correlation and hydrocarbon compositions of oil sand deposits in dahomey basin, nigeria saeed mohammed1, opuwari momonitu1, salam titinchi1, mohammed b. It is separated from the niger delta by a subsurface basement high referred to as the okitipupa ridge. It is subdivided into three formations, namely, from the oldest to the youngest. Eastern dahomey basin in nigeria comprises two major inland river basins which include the ogunosun and beninowena river basin, with the addition of the coastal aquifer. The iullemmeden basin in northwestern nigeria is known locally as the sokoto basin. Geology and mineral resources of nigeria nuhu george.
Agbadamashi2 and chukwudi ugbome2 1department of geology, college of physical and applied sciences, michael okpara university of agriculture, umudike, p. The basin is a marginal pullapart basin klemme, 1975 which developed in the. Generalized geology of the dahomey basin modified by billman, 1976 the abeokuta formation is the oldest formation in the dahomey basin. Dahomey embayment benin basin keta basin tano basin s a l t p o nd a n d c e n t r a l b a s i s ivory coast s t. Chemostratigraphic characterization of siliciclastic rocks. Ondo and edo states, mosunmolu ltd, lagos, nigeria, pp. The recent classification schemes are shown in table 1. The dahomey basin the dahomey basin is a combination of inlandcoastaloffshore basin that stretches from southeastern ghana through togo and the republic of benin to southwestern nigeria. Tectonic evolution and hydrocarbon prospectivity of. 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. Nigeria is underlain by seven major sedimenta ry basins, viz. The study area is situated in the coastal strip of dahomey basin, western nigeria fig. Geology and stratigraphy of dahomey basin dahomey basin is an extensive coastal sedimentary basin on the margin of gulf of guinea. Avon canyon is located in the area shown with dotted lines.
Most of the wells that penetrated the basement are in the eastern dahomey embayment of western nigeria. Geology and petroleum systems of the offshore benin basin \benin\ sands which outcrop in some onshore areas of the dahomey embayment point to the existence of another petroleum section of line be 8 262315 hessouh et al. The studied xformation is one of the paleocene strata bearing marine macrofossils. Electrical resistivity tomography ert, induced polarization ip and borehole logging were carried in locations with relatively enhanced electrical. Origin and residence time of shallow groundwater resources. Hydrocarbon geochemical characteristics and depositional. This group is the thickest sedimentary unit within the basin. The stratigraphy of the eastern dahomey basin has been studied and discussed by various authors 1 11 14 20. 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. Department of geology, federal university of technology, minna, nigeria. Pectographic study of carbonate sediments around yewa. Contains details on the geological units of nigeria and the associated mineral resources. The basin is bounded to the south by the niger delta basin hinge line.
Geology and mineral resources of nigeria ebook, 2009. Despositional environments and reservoir potential. Integrating airborne magnetic and landsat data for geologic. Geohydrologic section through northeastern sokoto basin, north western nigeria, showing principal aquifers and confining beds. Sedimentary succes sions in these basins are of middle mesozoic to recent age. Regional map of four countries showing the location of the benin dahomey basin in the gulf of guinea modified from brownfield and chapentier, 2006. Fence diagram showing subsurface geology of wstern sokoto province, northwestern nigeria. Regional geologic setting and stratigraphy the benin dahomey basin constituting part of a system of west african pericratonic margin sag basin.
In the togo and benin regions, the following rock types. Chemostratigraphy, involving the application of inorganic geochemistry for the characterization of sedimentary sequences has been applied in the study of siliciclastic rocks in parts of the eastern dahomey basin, southwest nigeria, with the aim of characterizing the rocks based on variations in inorganic geochemistry. The basin is dominated by lake volta, an artificial lake that extends far into the central part of the country behind the akosombo dam and covers about. It extends from southeastern ghana keta basin in the west, through southern togo and the southern benin republic to thin out at okitipupa ridge in nigeria in the east billman, 1976. It consists predominantly of a gently undulating plain with an average elevation varying from 250 to 400 m above sealevel. The main problems in the exploration of the nigerian portion of the dahomey basin include lack of drilling density, especially in the poorly mapped coastal area, and difficulty of acquisition of marine data in the shallowwater area of the gulf of guinea culdesac. Nigerian association petroleum explorationists, 7, 121. It is bounded in many places by granitic and metamorphic rocks of the basement complex and members of the younger granite suits. 1727 march 1990 with 3,846 reads how we measure reads. The province includes the ivory coast, tano, central, saltpond, keta, and benin basins and the dahomey embayment.
Geology and mineral resources of nigeria nuhu george obaje. Heavy minerals and mineralogical composition of subsurface. Palynological characterization of the tertiary offshore emi1 well, dahomey basin. The boreholes were drilled in the central part of the xformation, dahomey basin and was drilled up to the depth of 70ft. Apr 30, 2009 the iullemmeden basin in northwestern nigeria is known locally as the sokoto basin. The paleoceneearly eocene foraminiferal biostratigraphy. The foraminiferal biostratigraphy of the paleocene early eocene strata of sw nigeria which represents the eastern dahomey basin has been studied from four boreholes and two outcrops. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. P basin a u l f z r o m a n c h e f r a c t u r e z o n e c h a i n f r a c t u r e z o n e gulf of guinea volta basin 5 0 100 5 00 50 0 0n n w w e 0 200 400 km country boundary fracture zone sedimentary basin figure 1. Based mainly on available lithological, biostratigraphic and paleoenvironmental data, this paper summarizes the stratigraphic. Dahomey embayment with indication of the study area.
Geological and hydrogeological setting the study area is situated in the coastal strip of dahomey basin, western nigeria fig. This study employed electrical resistivity tomography ert in characterising the shallow groundwater aquifers of eastern dahomey basin in southwestern nigeria to assess the possible occurrence and distribution of saltwater within the aquifers. It extends from south eastern ghana through togo and benin republic into western nigeria slansky, 1962, antolini 1968, billman 1972. Geology of dahomey basin the dahomey basin is one of the sedimentary basins on the continental margin of the gulf of guinea, extending from southeastern ghana in the west to the western flank of the niger delta jones and hockey, 1964. Subsidence patterns in the nigerian sector of benin dahomey basin. Characterization of a bitumen seepage in eastern dahomey. Depositional facies and sequence stratigraphic study in. Electrical resistivity tomography ert, induced polarization ip and borehole logging were carried in locations with relatively. 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. Chemistry and materials research issn 2224 3224 print issn 2225 0956 online vol 2, no. The new mexico bureau of geology and mineral resources staff are closely following the recommendations of new mexico governor lujangrisham during the covid19 crisis.
Studies of geology and hydrology in the basin and range. Geological survey usgs consists of the coastal and offshore areas of cote divoire, ghana, togo, and benin, and the western part of the coast of nigeria, from the liberian border east to the west edge of the niger delta. A maximum thickness of about 12,000 m of sedimentary rocks is attained in the offshore western niger delta, but maximum thicknesses of sedimentary rocks are about 2,000 m in the chad basin and only 500 m in the sokoto embayment. Geology and stratigraphy the dahomey basin is an extensive sedimentary basin on the continental margin of the gulf of guinea.
Geologic map of the sokoto basin, northwestern nigeria. It is an extensive sedimentary basin in the gulf of guinea. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Broadhead, new mexico bureau of geology and mineral resources, a division of new mexico institute of mining and technology introduction the oil and natural gas that are produced from oil and gas fields reside in porous and permeable rocks reservoirs in which these liquids have collected and accumulated. The sokoto basin nigerian sector of the iullemmeden basin. Part 1 discusses the geology of the crystalline rocks and their regional distribution while the sedimentary basins constitute the subject of part 2. We are currently mostly working from home, and our facilities.
The geology of benin in west africa includes the northnortheast trending proterozoic dahomeyide orogen in the north and a range of cretaceous to holocene sedimentary rocks in the south, separated very closely by the 7th latitude 42 neogene alluvial deposits extend across benins northeastern border with niger. 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 chain fracture zone. This assertion is supported by the occurrence of large deposits of tar sand in the nigerian. The benin and western nigeria offshore basins, which are parts of an extensive basin called the dahomey benin embayment, were formed during the early cretaceous under similar tectonic conditions and continental sedimentary environments. Biostratigraphic studies of x and x boreholes,xformation. Broadhead, new mexico bureau of geology and mineral resources, a division of new mexico institute of mining and technology introduction the oil and natural gas that are produced from oil and gas fields reside in porous. This is an arcuate coastal basin, the onshore parts of which underlie the coastal plains of southwest nigeria, benin and togo. The province includes the ivory coast, tano, central, saltpond, keta, and benin basins and the dahomey. Basement geology in the sedimentary basins of nigeria. Origin and residence time of shallow groundwater resources in. Stratigraphy of western nigeria offshore basin the stratigraphy of the eastern dahomey basin has been studied and discussed by various authors 1 11 14 20. 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. Quantitative seismic geomorphology of fluvial systems of the pleistocene to recent in the malay basin, southeast asia, faisal alqahtani, christopher jackson, howard johnson, alex davis, and.
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