This assertion is supported by the occurrence of large deposits of tar sand in the nigerian. Hydrocarbon potential assessment of the maastrichtian. Earlier than january, 2015 5 2015 1 2016 3 2017 2 2019 1 to. 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. Geology, lithospheric structure and tectonics of the basin are only partially known. It consists predominantly of a gently undulating plain with an average elevation varying from 250 to 400 m above sealevel. Assessment of geotechnical properties of soils derived.
Contents geology igneous and metamorphic rocks the basement complex the younger granites cretaceous cenozoic magmatism and volcanism geology sedimentary basins the benue trough the bornu basin nigerian sector of the chad basin the sokoto basin nigerian sector of the iullemmeden basin the midniger bida basin the dahomey basin the niger. The sokoto basin nigerian sector of the iullemmeden basin. Akande 2 1 university of ilorin, 240093, ilorin, nigeria 2 university of ilorin, ilorin, nigeria. Geoelectric soundings for delineation of saline water. Biostratigraphic studies of x 1 and x 2 boreholes,xformation, dahomey basin nigeria.
The basement complex, which is precambrian in age, is made up of the. The stratigraphic setting of the eastern dahomey basin in the southwestern nigeria was described as having five 5 lithostratigraphic formations. Geology and stratigraphy the dahomey basin is an extensive sedimentary basin on the continental margin of the gulf of guinea. Its regional extent covers southwest nigeria, benin, togo and ghana fig. Contribution a prelude geologique du basin sedimentaire cotier au dahomey at du togo. However, the sedimentary successions in these basins are broadly divisible into.
Geology and mineral resources of the lower benue trough, nigeria. The dahomey basin is a very extensive sedimentary basin that extends from southeastern ghana in the west. The stratigraphy of the eastern margin of dahomey basins cretaceous to tertiary. The tectonic, stratigraphic and organic geochemical evaluations of these basins suggest the similarity with the contiguous basins of chad and niger republics and sudan, where commercial oil discovery have been made. 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. In areas characterized by complex geology, depth velocity analysis is the mandatory instrument to estimate the sharp velocity variations that can be expected. The assessment of potential source rocks of maastrichtian araromi.
Abundant mineral deposits occur in all the components of nigerian geology basement, younger granites, sedimentary basins. 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. Ondo and edo states, mosunmolu ltd, lagos, nigeria, pp. 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. Most of the wells that penetrated the basement are in the eastern dahomey embayment of western nigeria. Pectographic study of carbonate sediments around yewa. Thesis in the department of geology, university of ibadan adekeye, o. Stratigraphy of the nigerian sector of the benin dahomey basin. Grow, 1989, reprocessing of the cocorp data recorded across the wichita uplift and the anadarko basin in southern oklahoma. Geology and petroleum systems of the offshore benin basin. Geology and mineral resources of nigeria ebook, 2009. The recent classification schemes are shown in table 1. Niger delta province, nigeria, cameroon, and equatorial guinea, africa by michele l.
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. October 2017 bibliography of oklahoma anadarko basin. The study area is underlain by the sedimentary sequence of the dahomey basin. Avon canyon is located in the area shown with dotted lines. 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. 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. Dahomey basin is an extensive sedimentary basin in the gulf of guinea. Chemistry and materials research issn 2224 3224 print issn 2225 0956 online vol 2, no. Pdf geology and petroleum systems of the offshore benin. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough.
Petroleum prospectivity of the principal sedimentary basins on the united kingdom continental shelf. Estimation of magnetic contact location and depth of. The view that anambra basin lithostratigraphic names should not be used in the dahomey basin solely on the basis of age was supported by okosun 1990. The analysis of the sedimentary fills in a basin provides clues to the conditions prevalent during its evolutions. Dahomey embayment with indication of the study area. Basement geology in the sedimentary basins of nigeria. In the republic of benin, the geology is fairly well known billman, 1976.
Geological survey editorial standards or with the north american stratigraphic. Generalized geology of the dahomey basin modified by billman, 1976 the abeokuta formation is the oldest formation in the dahomey basin. Biostratigraphic studies of x and x boreholes,xformation. It extends from south eastern ghana through togo and benin republic into western nigeria slansky, 1962, antolini 1968, billman 1972. Doc geology of nigeria vincent kalu and stanless pee. Geology of the eastern dahomey basin with emphasis on the geology of the oil sands of ogun. Palynology and paleoenvironments of the upper araromi. This group is the thickest sedimentary unit within the basin.
General geology the benin dahomey basin is a very extensive sedimen tary basin. The dahomey basin stretches from southeastern ghana to southwestern nigeria. Deformed qzpe are compared to redeformed qzpdfs in the sudbury. The frontier cotonou basin or dahomeybenin embayment, situated west of the. We are currently mostly working from home, and our facilities. 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. Use of stable carbon isotope in characterization of tar sand deposit in southwestern nigeria. Dahomey basin ranges from continental to oceanic crust. This is an arcuate coastal basin, the onshore parts of which underlie the coastal plains of southwest nigeria, benin and togo. Furthermore, it is inappropriate to use the same names for lithostratigraphic units situated in different basins which are both widely separated from each other and have had different geologic. The iullemmeden basin in northwestern nigeria is known locally as the sokoto basin. 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. Geochemical discriminant for provenance characterization.
The dahomey basin is a continental margin basin situated on the northern margin of the gulf of guinea coast. In the togo and benin regions, the following rock types. 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. Petrographic studies and paleoenvironmental reconstruction. The boreholes were drilled in the central part of the xformation, dahomey basin and was drilled up to the depth of 70ft.
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. Petroleum potentials of the nigerian benue trough and. Geological map of dahomey basin in the nigerian sector and the states located on the basin modified after 1. The new mexico bureau of geology and mineral resources staff are closely following the recommendations of new mexico governor lujangrisham during the covid19 crisis. Basin, the lower, middle and upper benue trough, the chad basin, the sokoto basin, the midniger bidanupe basin and the dahomey basin. The studied xformation is one of the paleocene strata bearing marine macrofossils. 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.
The basin is a rift margin basin formed during the continental split between west africa gondwanaland and the south american land mass. 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. 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. Assessment of coal geology, resources, and reserves in the southwestern. The benin dahomey basin is one of the sedimentary basins located in the gulf of guinea oil province and straddles through four major countries, namely, ghana, the republic of benin, the federal republic of nigeria and the republic of togo. Geological map of dahomey basin in the nigerian sector and the states located on the basin 3. The basin is a marginal pullapart basin klemme, 1975 which developed in the. Geology and mineral resources of the lower benue trough. 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.
Department of applied geology, the federal university of technology, akure. Geology and petroleum systems of the offshore benin basin benin c. Scanning electron microscope description of the afowo oil sand. 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. Dahomey basin in the gulf of guinea modified from brownfield and chapentier, 2006. Geology of nigeria by kogbe pdf the gboko limestone, yandev, benue state, nigeria. Integrating airborne magnetic and landsat data for. Geochemical and organic petrological study of bituminous. The geology of nigeria as described by obaje 1, comprises of three litho petrological. 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. 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. Map showing location of the study area and the sampling points.
It is separated from the niger delta by the subsurface basement high okitipupa ridge around okitipupa in ondo state, nigeria 18 19. The geology of nigeria is made up of three major lithopetrological components, namely, the basement complex, younger granites, and sedimentary basins. General geological framework of the dahomey basin modified from bilman 29. Petroleum prospectivity of the principal sedimentary. 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. It is separated from the niger delta by a subsurface basement high referred to as the okitipupa ridge. Depositional facies and sequence stratigraphic study in. It is subdivided into three formations, namely, from the oldest to the youngest. 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. Hydrocarbon potential assessment of the maastrichtian araromi shales in the dahomey basin, southwestern nigeria.
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