Nigeria finds oil and gas in commercial quantities in anambra. The study area is located in the southern part of anambra basin of southern nigeria as shown in figure 1 below. Soil erosion is a wellknown environmental problem in south eastern nigeria. The basin is about 300 km long in a northeast southwest direction, extending between the onitsha environs in anambra state to the loko area in benue state ofnigeria. Sequence stratigraphy sedimentology and sequence stratigraphy of the nkporo group campanianmaastrichtian, anambra basin, nigeria shirley o. The areal extent maps were generated using the reports of the stratigraphic subsurface horizons of amansiodo1, ihandiagu1, igbariam1, alo1, anambra river1, akukwa1, and. A minor transgression occurred in late maastrichtian with the deposition of nsukka formation.
Confirming the incident, the state police public relations officer, mr. Simon provides expertise in the areas of sedimentology, sequence stratigraphy and reservoir geologymodelling and has considerable knowledge of the book cliffs. The study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. Utah stratigraphic columns overview page these stratigraphic columns are dynamically created on the fly from information stored in a database.
Sedimentology and stratigraphy american association of. The exception is the ulasi river, which rises near dikenafai in imo state, flows northward to ozubulu in anambra state and then turns round in a wide loop and heads for the. Campanianmaastrichtian, anambra basin, nigeria academia. Department of geology, anambra state university, uli, nigeria. The marginalshallow marine nkporo group is the basal lithostratigraphic unit of the late campanianmaastrichtian successions of the anambra basin, nigeria fig. Extent and distribution of groundwater resources in parts. Case study from nigeria, is an indepth research directed towards exploration and environmental degradational and impact of exploitation. Palynology, source rock potential and thermal maturity of. Flood risk assessment of port harcourt, rivers state, nigeria. The state lies in the anambra basin, the first region where intensive oil exploration was carried out in nigeria. Geological map of nigeria showing the northern anambra basin modified.
For about 200 miles this escarpment extends from where the colorado river descends south through debeque to price canyon near price, utah. All but one of the main rivers in anambra state empty into the river niger, which forms the western boundary of the state and constitutes the local baselevel for the rivers. Kinematics of faults and joints at enugu area of the. Facies analysis and depositional environment of the.
Section summary accessible from the selection map, the stratigraphic columns section will eventually be one of the most extensive parts of our database. The purposes of this association are to advance the science of geology. It underlies the whole of anambra state and parts of abia, enugu, imo, delta, edo and kogi states. A sequence stratigraphic model for the group was developed by nwajide and reijers 1996, on the basis of stratigraphic analysis of a composite section located at leru, near okigwe fig. This name later came to be shortened to anam bra anambra, the name it officially.
Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria. Subsurface evaluation of source rock and hydrocarbon. It is believed that the anambrabenin phase of campanianmiddle eocene is strongly contested. Highresolution correlation of upper cretaceous stratigraphy between the book cliffs and the western henry mountain syncline, utah. Kinematics of faults and joints at enugu area of the anambra basin d. Maastrichtian tidal flat sequence from the northern anambra basin, southern nigeria. This author studied the depositional model of the outcrops along isele azagbaonitshaakwa areas of the northern niger delta and anambra basins.
The mamu formation is a coalbearing sequence which is part of the late campanian early maastrichtian stratigraphic succession of the anambra basin in the southern benue trough of nigeria fig. Location map of anambra basin showing the study area and the inset of map of nigeria after nwajide, 2006. They follow instructions to construct a measured section. Emeka chukwuemeka said that the command was aware of the incident and that it has commenced investments, assuring that it would soon unravel what happened. The state commissioner of police, mr balla nasarawa. Free web tutorials sequence stratigraphy, tutorials carbonate. Trace fossils from the campanian maastrichtian enugu. This study is a contribution to the understanding of the play fairway in the anambra basin. Sequence stratigraphic interpretation of parts of anambra. The mesaverde group is wellexposed in the book cliffs of eastcentral utah and western colorado. The stratigraphy of the anambraabakaliki basins reyment, 1965 campanian nkporo group including nkporo shale, oweli sandstone, enugu shale, results and discussion vertical electrical sounding ves.
Paleontologic and stratigraphic relations of phosphate beds in upper cretaceous rocks of the cordillera oriental, colombia by edwin k. He said anambra state had three sources of oil supply which included, the existing local reserve from the brassagip, import from venezuela as well as the already discovered wells at oromaetiti in anambra west and otuocha in anambra east council areas of the state. The american association of petroleum geologists is an international organization with over 38,000 members in 100plus countries. A sequence stratigraphic model for the group was developed by nwajide and reijers 1996, on the basis of stratigraphic analysis of a composite section located at leru, near okigwe. Stratigraphy is the science of the layered character of rocks, be these sedimentary, volcanic, metamorphic, or igneous rocks.
Representative ves curves from three locations are presented fig. Location of the study area the areas lies between longitude 6 041s 7011e and latitude 4 0 40 1 5000 1n. This observation is similar to the work of umeji, 2006 for the turonian campanian boundary between the abakaliki and anambra basins, as exposed at leru, southeastern nigeria. Department of geology, anambra state university, uli, nigeria abstract integration of sedimentologic and sequence stratigraphic interpretations of the nkporo group has provided the basis for a basinwide framework for prediction of potential source, seal and reservoir rocks in the anambra basin, nigeria. Sequence stratigraphy of the book cliffs of eastern utah. Anambra basin has about 6,000 m of sedimentary rocks. The book cliffs are a series of desert mountains and cliffs in western colorado and eastern utah, in the western united states.
It was done by estimating the geographic extent of the basins petroleum system in order to create the areal extent maps. This author studied the depositional model of the outcrops along iseleazagbaonitshaakwa areas of the northern niger delta and anambra basins. The units are arranged to form two stratigraphic sequences represented by the nkporo shaleowelli sandstone and. The north progradation of the fore slope is further documented by johnson chapter in usgs, in press, whose subsurface correlations indicate that the mancos b of kellogg occupies approximately the lower 800 ft of the prairie canyon at the rattlesnake state 212 drill hole. At some point, this section will contain hundreds of stratigraphic columns from all over the colorado plateau. Play fairway evaluation of the anambra basin, southeast. Although rare, concretions in the pierre near the kansascolorado state line along the smoky hill river give up some nice barite and calcite crystals. Together with his experience from spdc shell nigeria, simon effectively demonstrated both theoretical and applied aspects at all levels in a clear, concise and thoughtful manner. The area is richly drained by the anambra, ezu and ezechi rivers while the.
Basinwide stratigraphic correlation across the anambra basin using base of the. A regressive phase of this transgression occurred in middle maastrichtian with the deposition of the mamu formation and subsequent deposition of ajali sandstones. Pdf lithofacies, palynofacies, and sequence stratigraphy of. Accepted 23 august, 2010 structural analysis of joints and fault data obtained from exposures of. Olatunji palystrat limited, ibadan nigeria madukwe, henry y department of geology, ekiti. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough.
It is the removal of soil particles from surface of the earth, transportation and deposition of the particles by the. The book cliffs form a sinuous southwardfacing escarpment. Cost includes tuition, fees, food, lodging and transportation to. It constitutes a classic foreland basin clastic wedge, which developed in response to uplift and erosion along the sevier orogen during the late cretaceous. The desert and castlegate sandstones, 2001 pages iiii, 181. Geologic setting and stratigraphy the anambra basin is one of the cretaceous sedimentary basins of nigeria, bounded on the southwestern flank by the niger delta hinge line, northwest by the benue flank and southeast by the abakaliki fold belt. The lower slope exposes marine shales of the cretaceous mancos shale while interfingering sandstone beds of the upper mancos and overlying mount garfield formation generally referred to as the mesa verde group or formation were. Prior to the tectonic event the anambra basin was sandstone that successively. It is located on the bonny river about 64km, 40miles from the sea fig 1. Anambra and enugu states and it is floating into anambra state. The enugu formation has been the subject of many studies concerning stratigraphy 1, depositional environments 2.
Biostratigraphy,paleoenviroment and sequence stratigraphy. The book cliffs of eastern utah and western colorado figs. The book cliffs are one of the most recognizable landforms in western colorado and eastern utah. Anambraimo river basin development authority channels. Enugu expressway in anambra state, southeastern nigeria. Introduction the sedimentology, sequence stratigraphy and hydrocarbon potentials of eocene nanka formation sedimentary fill of the anambra basin, southeastern nigeria, have been studied by various researchers. Obala nkpume na eti mkpili, oke mmili ndu, mmili ala naazu omambala, the mystic arteryvein of the dark race. This video is a virtual field trip to one of the classic locations in the world book cliffs, utah, usa where the sequence stratigraphy method was developed and tested. Sequence stratigraphy, a branch of sedimentary stratigraphy, is a methodology that uses the order sedimentary strata accumulated within a framework of major depositional and erosional surfaces to interpret the depositional setting of clastic and carbonate.
The anambra basin represents about one tenth of the benue trough and is the least studied inland basin in nigeria. Nanka formation, anambra basin, agulu lake, rockeval pyrolysis, kerogen and palynomorphs i. The lithostratigraphicunits in the study area isnsugbe sandsoligocene. The process began with the flag off of a graduate farmers employment scheme gfes at the anambraimo river basin development authority in. Sedimentology and sequence stratigraphy of the eocene.
Several workers have studied the anambra basin and niger delta in terms of sedimentology, stratigraphy and sequence stratigraphic concepts nwajide and reijers 1996. It overlies the marine enugu formation of the nkporo group. Sedimentology and sequence stratigraphy of the nkporo. Nwajide and reijers 1996, umeji, 2003 and chiaghanam, 2008 have studied the nanka formation with respect to their lithostratgrphy, age relations, sequence stratigraphy, depositional environment, reservoir. Department of geology, ekiti state university, ado ekiti nigeria olaburaimo a.
In exercise 2, students work either with polarized microscopic photographs linked online to specific units in their measured section or directly. Rainfall trends and implications for flooding in northern. Fielding, christopher 1 1 earth and atmospheric sciences, university of nebraskalincoln, lincoln, ne this study presents highresolution correlations of the upper cretaceous stratigraphy between the book cliffs and the western henry. Obi department of geology, anambra state university, uli, nigeria abstract integration of sedimentologic and sequence stratigraphic interpretations of the. The result of the contour generated shows that area close to.
However, some of the most spectacular barite crystals are those collected from concretions in the mancos shale in the book cliffs near grand junction, colorado. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation. 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. Cretaceous and tertiary formations of the book cliffs carbon. Its southwestern tip is about 160 km wide, while the northeastern extreme is about 48 km wide whiteman, 1982 fig. The video shows some of the field evidence for sealevel change and how the sequence stratigraphy model has been applied to this shallowmarine and fluvial succession. Paleocene and ameki formation middle eocene, anambra state, nigeria. The book cliffs are one of the worlds best places to study sequence stratigraphy. Palynological and sequence stratigraphy characterization of the earlylate campanian nkporo shale, orekpekpeimiegba area, anambra basin, nigeria adebayo olajide f.
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