The study examined the effect of the 2012 flooding on structural components and fabrics of buildings at ogbaru local government area of anambra state. When downwarp of the kalahari basin began in the late cretaceous these rivers were backtilted into the newly formed basin and deposition of the kalahari group sediments began. The first of john mcphees works in his series on geology and geologists, basin and range is a book of journeys through ancient terrains, always in juxtaposition with travels in the modern worlda history of vanished landscapes, enhanced by the histories of people who bring them to light. It was done by estimating the geographic extent of the basins petroleum system in order to create the areal extent maps. Basin introduction the mahanadi basin, a product of rifting and break up of gondwana land, situated on the east coast of india figs. According to 26, aguleri is a very large town situated at the bank of the river anambra called omanbala by the indigenes and corruptly nicknamed anambra by the european settlers. This name later came to be shortened to anam bra anambra, the name it officially. The ajali sandstone is a major clastic lithologic unit in the anambra basin which resulted from the tectonics and structure of the benue trough during the. The result from the first vertical derivative shows that the northern part of the area is covered by the young biotite granite of precambrian origin, and the western edge is covered by the old granite, gneisses, and migmatite of western.
Agagugeology and petroleum potentials of santonian to maastrichtian sediments in the anambra basin. It extends northwestward into the niger valley, northward to the jos massif and northeastward as far as lafia. Tectonic and sedimentation framework of the lower benue trough. Arapahoe basins dedicated instructors help kids develop lifelong snowsports skills in lessons with small class sizes. During the visit, the team also inspected the 20 kilometre access road to the oil wells and the 10 kilometre flow line for evacuating crude to a spot at anambra river basin from where evacuation. Granulometric, heavy mineral and field studies of the lokoja bassangae and fugar sandstone outcrop sequences on the benin flank of the anambra basin. Onitsha, a historic port city from precolonial times, has developed as by far the largest urban area in the state. Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria. 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. This study is a contribution to the understanding of the play fairway in the anambra basin. Arapahoe basin ski area ski resort resort and ski area. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. It is a product of stresses consequent upon movement along the fracture zones associated with the benue trough amogu et al. Our natural lip balm moisturizes lips with avocado butter, hemp oil, and beeswax, with added spf 15 for sun protection.
The anambra basin, located in the southern benue trough is a post santonian synclinal sedimentary structure containing over 5,000m thick of upper cretaceous to recent sediments. Controversy surrounding the stratigraphy of the anambra basin, depositional environments and conditions, and age of geologic formations. Gravity models as tool for basin boundary demarcation. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size distribution morphologic studies. Rich moisturizing ingredients leave your skin smooth and silky all day long. P4and itiowe k5 1,5department of geology, university of port harcourt, port harcourt, nigeria 2 dept. The title refers to the physiographic province of the united states that reaches from. Sedimentology and sequence stratigraphy of the eocene nanka. 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. In the samarinda region the neogene section alone reaches a thickness of up to 9 km.
Play fairway evaluation of the anambra basin, southeast. Estimating the thickness of sedimentation within lower benue. The areal extent maps were generated using the reports of the stratigraphic subsurface horizons of amansiodo1, ihandiagu1, igbariam1, alo1, anambra river1, akukwa1, and nzam1. By continuing to use our site, you consent to the use of cookies. Reyment 1965, reyment and morner 1977 and zaborski 2000 described the transgressive and regressive cycles related to marine sedimentation in the area. Sinistrial movements along earlier existing shear faults have been proposed for their origin based on field evidence benkhelil and robineu, 1983, okoro et al. The anambra basin is about 40,000 km2 in size ogala, 2011 and is bounded to the west by the okitipupa ridge, in the east by abakaliki basin, and in the south by the niger delta basin fig. Anambra basin is a cretaceous depocentre that received campanian to tertiary sediments nwajide, 1990 and obi, 2000. The total aeromagnetic data covering the study area was subjected to first vertical derivative, spectral depth analysis, and source parameter imaging spi. The main geologic units of the study area are the nanka sand ecocene, overlain by ogwashiasaba, formation oligocene and underlain by imo. The basin is bounded to the south by the niger delta basin hinge line. Three schools of thought have been engaged in the argument. Trace fossils from the campanian maastrichtian enugu formation. The main oil source formations of the anambra basin, southeastern nigeria.
Tertiary sedimentation in the basin has been fairly continuous since its inception in. Pdf crustal structure of southern benue trough, nigeria from 3d. Having been in operation since 1946, the legend offers some of the highest skier and rider accessible terrain in north america where half of the mountain sits above the timberline with skiing and snowboarding through late spring and early summer. The volta basin authority international network of basin.
Aug 12, 2003 about 30 tcf of gas and 1 bn barrels of crude oil has been found in the anambra river basin in anambra state, the director of engineering standard in the department of petroleum resources dpr, mr patrick onwumere, said in awka. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Pdf the study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. Basin introduction kutch basin forms the northwestern part of the western continental margin of india and is situated at the southern edge of the indus shelf at right angles to the southern indus fossil rift zaigham and mallick, 2000. The ankpa basin now has a sediment thickness of about 5000 m comprising pre. Aqueduct metadata document mekong river basin study pdf. Like its immediate neighboring, krishnagodavari basin, mahanadi basin also. The stratigraphic setting of southern nigeria comprises sediments of three major sedimentary cycles. Obala nkpume na eti mkpili, oke mmili ndu, mmili ala naazu omambala, the mystic arteryvein of the dark race. Subsurface evaluation of source rock and hydrocarbon. Our body butters are the creamiest moisturizer on the planet. The states theme is light of the nation, formerly known as the home for all. The data selection and validation process for the mekong river basin study involved three steps.
The main oil source formations of the anambra basin. Ditch cutting samples from an exploratory nzam1 well located in the northwestern part of anambra basin were subjected to lithological. Sedimentology and sequence stratigraphy of the nkporo. This could have introduced an accuracy which is beyond the original data. Anambra river1, ihadagu1 and very scanty 2d seismic information, anambra basin is under explored. Ekweozor department of chemistry, university of ibadan, ibadan, nigeria. Depositional environments, organic richness, and petroleum. The lithologic units of the succession are basically shales with ironstone intercalation showing a likely marine depositional environment. The basin is a nwse trending embayment, perpendicular to the main axis of the benue trough and the niger delta basin fig. The study area is part of the western flank of anambra basin, a roughly triangular subbasin in the southern benue trough of nigeria. It stretches from north to south over a distance of 1850 km with a basin covering an area of about 400,000 km2.
Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite. The basin data is derived from a lower resolution grid which has been upsampled using gmt. The southern benue trough and anambra basin, southeastern nigeria. Introduction this study examines part of the sedimentary units of the eocene nanka formation of anambra basin exposed at lat. Department of geology, anambra state university, uli. The anambra basin was initiated as a result of the uplift of the abakaliki anticlinorium during the santonian. Depositional environment of siliciclastic deposits on the western.
The oldest sediment in the anambra basin is nkporo group nwajide, 1990. Outcrops of the formation are well exposed along the long reach of orle stream in auchi as well as road embarkments at ayogwiri, fugar and othame environs in the western flank of the anambra basin, southwestern nigeria. The 60,000 km2 kutai basin of east kalimantan figs. Nigeria finds oil and gas in commercial quantities in anambra. Pdf granulometric, heavy mineral and field studies of the lokoja. Pdf geology and depositional environment of campano. It is bounded by the nagar parkar fault in the north, radhanpurbarmer. Pdf 3d moho interface has been computed from the airborne bouguer anomaly beneath the southern part of the benue trough bt. This project work was based on the biostratigraphy of the outcrop in enugu area in anambra basin, nigeriathe basin came into existence during the santonian orogeny. Evidence from field relationship and sedimentological study adeigbe, o. Jun, 20 journal of environment and earth science issn 22243216 paper issn 22250948 online vol. Like its immediate neighboring, krishnagodavari basin, mahanadi basin also has a geological extension into offshore. Hydrocarbon prospects of the post santonian upper cretaceous rocks of the anambra basin, abakaliki fold belt, afikpo syncline, calabar flank and benue depression and flanking basins.
Mr onwumere who led a team of experts to assess the volume of gas and crude reserves in the anambra river basin as well as gauge the preparedness of the state government in the establishment of an indigenous refinery through its oil company, orient petroleum resources, said the team was impressed with what it saw on the ground. Structural controls on the evolution of the kutai basin. Basin introduction directorate general of hydrocarbons. It is located between longitudes 7 030 and 800 east and latitudes 6 026 and 630 north.
It was deposited in early maastrichtian kogbe, 1989 and obi, 2000. The investigated sections consist of coarsening upward sequences with thick, dark gray shale at the base, grading upward through siltstones into. Oil seepages have also been reported from parts of the basin. The first two cycles belong to the presantonian sediments while the third cycle belongs to postsantonian sediments which are. Orient petroleum resources plc opr was established to harness the vast but mostly untapped mineral, agricultural and human resources, especially hydrocarbon deposits in anambra basin, for the industrialization of the area, improvement of the socioeconomic wellbeing of the people while creating value for the stakeholders. The actual boundary of the anambra basin has been a subject of controversy. Sedimentology,sequence stratigraphy,anambra basin,nanka formation and eocene. The study area is a significant part of anambra river basin stratigraphy and is basically, a result of the paleohydrogy of the region durham et al, 2008. Excitement as orient petroleum strikes oil in anambra.
Anambra basin is one of the energyrich inland sedimentary basins in nigeria. The study area is located in the southern part of the anambra basin and covers about 2200 km 2. It was deposited into the basin in late campanian, comprising nkporo shale, owelli sandstone and enugu shale reyment, 1965 and obi, 2001. Textural characteristics of the siliciclasts of ajali. But seriously, our website andor its thirdparty tools use cookies, which are necessary to its functioning and are required to achieve the purposes illustrated in the privacy policy. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation. Known as the legend, arapahoe basin is nestled high along loveland pass about 68 miles outside of denver, colorado. Prior to the orogeny, it was a proto basin covered by thin veneer of older sediments. It is frequently regarded as the northwestern extension of the anambra basin, both of which were major depocentres during the third major transgressive cycle of southern nigeria in late cretaceous times. The images are hyperlinks and will open up a separate window with a high resolution pdf image of the map. The areal extent maps were generated using the reports of the stratigraphic subsurface horizons of amansiodo1, ihandiagu1, igbariam1, alo1, anambra river1, akukwa1, and. The upshot of the 2012 flooding on structural components and.
Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria pdf. Maastrichtian successions of the anambra basin, southeastern nigeria. It evolved from the southern portion of the benue trough. The sedimentary rocks comprise ancient cretaceous deltas, somewhat similar to the niger delta, with the nkporo shale, the mamu formation, the ajali sandstone and the nsukka formation as the main deposits. Nov 28, 20 this study is a contribution to the understanding of the play fairway in the anambra basin. Previous accounts of the stratigraphy of the lower benue trough such as those of reyment.
Sedimentology and sequence stratigraphy of the eocene. Basin 35 mm mm 265 415 mm mm 190 mm 160 mm 29 s mm 45 mm 190 mm mm 440 mm av 3438 semlrewssed basin 440 x 183 mm mm 31 mm 45 mm 620 mm av 3620 art basin mm 170 85 125 170 mm mm 510 mm wb 3510 semlrac. The marginalshallow marine nkporo group is the basal lithostratigraphic unit of the late campanianmaastrichtian successions of the anambra basin, nigeria fig. The basin is bounded to the south by the niger delta hinge line. This page bundles the available data for the anambra basin in the africa. The study area lies within the anambra basin and it is made up of enugu shale, mamu formation, ajali sandstone, and nsukka formation. Crustal structure of southern benue trough, nigeria from 3d. Journal of environment and earth science issn 22243216 paper issn 22250948 online vol.
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