Tonle sap basin strategy has been formulated in support of the country strategy and program 20052007, and forms the basis for setting priorities and planning assistance in the tonle sap basin over the next 510 years. 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. Sustainable river basin management needs water allocation mechanisms based on a com. The niger basin is an expansive region in west africa that is home to more than million people. We combine chemical analyses of water samples from 40 different streams. In the tonle sap basin, the development objectives are to foster, promote, and facilitate. Nbi role in facing energy security challenges in the nile. This group is the thickest sedimentary unit within the basin. Estimation of shallow groundwater recharge in the great. 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 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. Dahomey basin, provenance, heavy minerals, and mineralogical composition. Profile of noyyal river basin 56 shortage or shortage of water for industrial and agricultural purposes.
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. Electrical resistivity imaging eri of slope deposits and. Niger river basin in west africa is on the extreme end of the vulnerability scale. 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. Petrographic studies and paleoenvironmental reconstruction of. Outcrop analog are important tools for better understanding of large scale seismic features such as slope deposits and structures. Geological map of dahomey basin in the nigerian sector and the states located on the basin modified after 1. The ogwashiasaba formation consists of cross bedded sandstone, carbonaceous mudstone the continental sediments of the nigerian coastal basins 83 shales, seams of lignite and clay. The recent classification schemes are shown in table 1. Determining a sediment budget for the mobile river basin. Sedimentary succes sions in these basins are of middle mesozoic to recent age. The iullemmeden basin in northwestern nigeria is known locally as the sokoto basin. The basin is a marginal pullapart basin klemme, 1975 which developed in the. 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.
The galisteo basin contains some of new mexicos most unique and irreplaceable archaeological, cultural, water and other natural resources. The romanche transform fault and chain fractures zones. Dahomey basin sw nigeria scientific research publishing. Geography the nigercrosses areas with different climatic. Detailed geology, evolution, stratigraphy and hydrocarbon. Geochemical classification and maturity of the coastal plain. Geochemical classification and maturity of the coastal. However, the active drainage area is less than half of the basin and excludes algeria. Dahomey basin is an extensive sedimentary basin in the gulf of guinea. 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.
Hydrocarbon potential assessment of the maastrichtian araromi. 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. 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 paleoceneearly eocene foraminiferal biostratigraphy. Feb 23, 20 chemistry and materials research issn 2224 3224 print issn 2225 0956 online vol 2, no. The assessment of potential source rocks of maastrichtian araromi. Akande 2 1 university of ilorin, 240093, ilorin, nigeria 2 university of ilorin, ilorin, nigeria. Hydrocarbon potential assessment of the maastrichtian. Regional map of four countries showing the location of the benin dahomey basin in the gulf of guinea modified from brownfield and chapentier, 2006. It is separated from the niger delta by a subsurface basement high referred to as the okitipupa ridge. The studied xformation is one of the paleocene strata bearing marine macrofossils. The analysis of the sedimentary fills in a basin provides clues to the conditions prevalent during its evolutions. Regional geologic setting and stratigraphy the benin dahomey basin constituting part of a system of west african pericratonic margin sag basin.
Estimates of average shallow groundwater recharge rates for 8digit hydrologic unit code huc, u. Petrographic studies and paleoenvironmental reconstruction. Pdf geology and petroleum systems of the offshore benin. The basin suffers further from a large adaptation deficit national and local governments are not equipped to respond to ongoing climaterelated events, much less escalated future events. These, and others, can be accessed through the africa groundwater literature archive. An act to confer legal status in uganda on the nile basin initiative, and otherwise give the force of law in uganda to the signed agreed minute no.
The following references provide more information on the geology and hydrogeology of benin. 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. In the southeast the vast hodh basin, with its dunes, sandstone plateaus, and immense regs, is a major livestockraising region, the economy of which has many links with neighbouring mali. Description of the study area the mrb encompasses 1,185 km2 along the states of mississippi, alabama, tennessee and georgia figure 1. Geology and depositional environment of campanomaastrichtian sediments in the. The continental sediments of the nigerian coastal basins. Depositional facies and sequence stratigraphic study in. The paleoceneearly eocene foraminiferal biostratigraphy of. 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. Geological map of dahomey basin in the nigerian sector and the states located on the basin 3. Groundwater is the dominant source of domestic water supply in rural communities across the basin. The benin coastal basin belongs to the dahomey embayment figure 1 an extensive basin delimited in its offshore area by the romanche and chain fractures zones and formed during the opening of equatorial atlantic. 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 tonle sap basin strategy asian development bank. 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. Nigerian association petroleum explorationists, 7, 121. Biostratigraphic studies of x and x boreholes,xformation. Pdf geology and petroleum systems of the offshore benin basin. Petsanimals dogs are allowed for hunting migratory birds, squirrels. Generally, species nomenclature for dinoflagellate cysts followed fensome and williams 2004. Thermal maturity evaluation of albian shales from offshore. It consists predominantly of a gently undulating plain with an average elevation varying from 250 to 400 m above sealevel. A number of authors have identified and described the eight lithostratigraphic units in the dahomey basin 5,6,7,8,9. 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. The slides, residues, unprocessed samples, cd copies and duplicate prints are in the palynological collections of the biological sciences department. Apr 30, 2009 the iullemmeden basin in northwestern nigeria is known locally as the sokoto basin. 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.
The depositional environments and provenance characteristics. The boreholes were drilled in the central part of the xformation, dahomey basin and was drilled up to the depth of 70ft. The views expressed in this publication are those of the authors and do not necessarily reflect the views and policies. Seismic stratigraphy and development of avon canyon in benin dahomey basin, southwestern nigeria seismic stratigraphy and development of avon canyon in benin dahomey basin, southwestern nigeria olabode, s. Introduction a proper understanding of modern sedimentary environment is based mainly on three parameters which are their physical, chemical and biological characteristics. Water flow in the river basin occurs during the monsoon. Palynology and paleoenvironments of the upper araromi.
The dahomey basin is an extensive sedimentary basin on the continental margin of the gulf of guinea. This session seeks to create a shared understanding of. Geology and total petroleum systems of the westcentral. The quality of the nile waters has generally deteriorated because of population growth, intensification of agriculture, and industrial development. This study was aimed at mapping the subsurface extent of saline water intrusions into aquifers at the eastern part of dahomey basin, nigeria. An upper flood plain environment was suggested by whiteman 1982 based on the present day sedimentary environments of the niger delta proposed by allen 1965. Depositional facies, sequence stratigraphy, benin dahomey basin, ilaro formation, coastal.
Subsidence patterns in the nigerian sector of benin dahomey basin. The dahomey basin is a very extensive sedimentary basin that extends from southeastern ghana in the west. Akande 2 1 university of ilorin, 240093, ilorin, nigeria 2 university of ilorin, ilorin, nigeria dahomey basin is an extensive sedimentary basin in the gulf of guinea. Oshin department of geology, obafemi awolowo university, ileife, nigeria centre for energy, research and development, obafemi awolowo university, ile. Please contact the complex headquarters for more information. Nigeria dahomey basin opl 310 lekoil commissioned a regional basin study and identified the dahomey basin block opl 310 as a key target. 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 population groups that manage water, make or influence decisions, receive benefits, or bear costs and risk have different levels of access to resources, knowledge, political representation, or courts. Chemistry and materials research issn 2224 3224 print issn 2225 0956 online vol 2, no. Dahomey embayment with indication of the study area. The frontier cotonou basin or dahomeybenin embayment, situated west of the.
Geoelectric soundings for delineation of saline water. This is an arcuate coastal basin, the onshore parts of which underlie the coastal plains of southwest nigeria, benin and togo. It extends from south eastern ghana through togo and benin republic into western nigeria slansky, 1962, antolini 1968, billman 1972. The dahomey basin evolved in the late jurassic early cretaceous as a result of the separation of.
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. Characterization of a bitumen seepage in eastern dahomey. Nigeria is underlain by seven major sedimenta ry basins, viz. For dinoflagellates and acritarchs, monographs of powell 1992, jan du chene 1987 and sluijs et al. 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. Heavy minerals and mineralogical composition of subsurface. These could be related to a number of features in the study area including its. Basin the objective of this session is to identify constraints and opportunities for effective transboundary water governance, explore options and draw workable recommendations for cooperative management and development of the nile basin. The sokoto basin nigerian sector of the iullemmeden basin. Hydrocarbon potential assessment of the maastrichtian araromi shales in the dahomey basin, southwestern nigeria. Nbi role in facing energy security challenges in the nile basin.