Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria pdf. Sedimentology and sequence stratigraphy of the eocene nanka. It extends northwestward into the niger valley, northward to the jos massif and northeastward into lafia. The volta basin authority international network of basin. By continuing to use our site, you consent to the use of cookies. It was done by estimating the geographic extent of the basin s petroleum system in order to create the areal extent maps. 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. Tertiary sedimentation in the basin has been fairly continuous since its inception in. Crustal structure of southern benue trough, nigeria from 3d. Sedimentological attributes and stratigraphic of nanka formation, anambra basin,nigeria acra 2e. Sedimentology and sequence stratigraphy of the eocene. Controversy surrounding the stratigraphy of the anambra basin, depositional environments and conditions, and age of geologic formations.
It was deposited in early maastrichtian kogbe, 1989 and obi, 2000. It extends northwestward into the niger valley, northward to the jos massif and northeastward as far as lafia. The southern benue trough and anambra basin, southeastern nigeria. Biostratigraphy and paleoenvironment of the coniacian awgu formation in nzam1 well, anambra basin, southeastern nigeria. The upshot of the 2012 flooding on structural components and. Structural controls on the evolution of the kutai basin. It is bounded by the nagar parkar fault in the north, radhanpurbarmer. The study examined the effect of the 2012 flooding on structural components and fabrics of buildings at ogbaru local government area of anambra state. Our kids lessons are designed to foster a childs love of mountain recreation in a fun, inclusive atmosphere. Obala nkpume na eti mkpili, oke mmili ndu, mmili ala naazu omambala, the mystic arteryvein of the dark race. 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. Estimating the thickness of sedimentation within lower benue. In the samarinda region the neogene section alone reaches a thickness of up to 9 km. This page bundles the available data for the anambra basin in the africa.
Anambra basin is one of the basins in nigeria, habouring the largest deposit of subbituminous coal and lignite. Pdf geology and depositional environment of campano. Three schools of thought have been engaged in the argument. The anambra basin was initiated as a result of the uplift of the abakaliki anticlinorium during the santonian. This study aimed at determining the geology and depositional environmental of these formations through field relationship and grain size distribution morphologic studies. The investigated sections consist of coarsening upward sequences with thick, dark gray shale at the base, grading upward through siltstones into. Depositional environments, organic richness, and petroleum. Basin introduction the mahanadi basin, a product of rifting and break up of gondwana land, situated on the east coast of india figs. 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. Known as the legend, arapahoe basin is nestled high along loveland pass about 68 miles outside of denver, colorado. The oldest sediment in the anambra basin is nkporo group nwajide, 1990.
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. Biostratigraphy and paleoenvironment of the coniacian. The states theme is light of the nation, formerly known as the home for all. This could have introduced an accuracy which is beyond the original data. 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 main geologic units of the study area are the nanka sand ecocene, overlain by ogwashiasaba, formation oligocene and underlain by imo. Depositional environment of siliciclastic deposits on the western. Arapahoe basin ski area ski resort resort and ski area.
The main oil source formations of the anambra basin. Nigeria finds oil and gas in commercial quantities in anambra. Oil seepages have also been reported from parts of the basin. Anambra basin is a cretaceous depocentre that received campanian to tertiary sediments nwajide, 1990 and obi, 2000. 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. Previous accounts of the stratigraphy of the lower benue trough such as those of reyment. Like its immediate neighboring, krishnagodavari basin, mahanadi basin also. Reyment 1965, reyment and morner 1977 and zaborski 2000 described the transgressive and regressive cycles related to marine sedimentation in the area. 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. 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. Play fairway evaluation of the anambra basin, southeast. Our natural lip balm moisturizes lips with avocado butter, hemp oil, and beeswax, with added spf 15 for sun protection. The study area is located in the southern part of the anambra basin and covers about 2200 km 2. 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.
The ankpa basin now has a sediment thickness of about 5000 m comprising pre. The anambra basin is situated west of the lower benue trough and is often considered youngest formation of the benue trough. Basin introduction directorate general of hydrocarbons. Introduction this study examines part of the sedimentary units of the eocene nanka formation of anambra basin exposed at lat. Ekweozor department of chemistry, university of ibadan, ibadan, nigeria. Subsurface evaluation of source rock and hydrocarbon. The data selection and validation process for the mekong river basin study involved three steps.
Agagugeology and petroleum potentials of santonian to maastrichtian sediments in the anambra basin. The actual boundary of the anambra basin has been a subject of controversy. The 60,000 km2 kutai basin of east kalimantan figs. The stratigraphic setting of southern nigeria comprises sediments of three major sedimentary cycles. It evolved from the southern portion of the benue trough. The study area is part of the western flank of anambra basin, a roughly triangular subbasin in the southern benue trough of nigeria. 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 river1, ihadagu1 and very scanty 2d seismic information, anambra basin is under explored. The total aeromagnetic data covering the study area was subjected to first vertical derivative, spectral depth analysis, and source parameter imaging spi. 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. Rich moisturizing ingredients leave your skin smooth and silky all day long.
The basin is bounded to the south by the niger delta basin hinge line. Subsurface evaluation of source rock and hydrocarbon potential of the anambra basin, south eastern nigeria iheanacho princewill ugochukwu dissertation. Like its immediate neighboring, krishnagodavari basin, mahanadi basin also has a geological extension into offshore. The lithologic units of the succession are basically shales with ironstone intercalation showing a likely marine depositional environment. 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 basin is bounded to the south by the niger delta hinge line. The title refers to the physiographic province of the united states that reaches from.
Our body butters are the creamiest moisturizer on the planet. The main oil source formations of the anambra basin, southeastern nigeria. The marginalshallow marine nkporo group is the basal lithostratigraphic unit of the late campanianmaastrichtian successions of the anambra basin, nigeria fig. Ditch cutting samples from an exploratory nzam1 well located in the northwestern part of anambra basin were subjected to lithological. Arapahoe basins dedicated instructors help kids develop lifelong snowsports skills in lessons with small class sizes. Evidence from field relationship and sedimentological study adeigbe, o. Sedimentology,sequence stratigraphy,anambra basin,nanka formation and eocene. Pdf granulometric, heavy mineral and field studies of the lokoja.
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. Pdf 3d moho interface has been computed from the airborne bouguer anomaly beneath the southern part of the benue trough bt. Nov 28, 20 this study is a contribution to the understanding of the play fairway in the anambra basin. It is located between longitudes 7 030 and 800 east and latitudes 6 026 and 630 north. It was done by estimating the geographic extent of the basins petroleum system in order to create the areal extent maps. Maastrichtian successions of the anambra basin, southeastern nigeria. Trace fossils from the campanian maastrichtian enugu formation. Jun, 20 journal of environment and earth science issn 22243216 paper issn 22250948 online vol. Excitement as orient petroleum strikes oil in anambra. 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.
Department of geology, anambra state university, uli. The first two cycles belong to the presantonian sediments while the third cycle belongs to postsantonian sediments which are. 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. The basin data is derived from a lower resolution grid which has been upsampled using gmt. Pdf crustal structure of southern benue trough, nigeria from 3d. 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. This name later came to be shortened to anam bra anambra, the name it officially.
It stretches from north to south over a distance of 1850 km with a basin covering an area of about 400,000 km2. Textural characteristics of the siliciclasts of ajali. Sedimentology and sequence stratigraphy of the nkporo. 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. Aqueduct metadata document mekong river basin study pdf.
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. 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. The areal extent maps were generated using the reports of the stratigraphic subsurface horizons of amansiodo1, ihandiagu1, igbariam1, alo1, anambra river1, akukwa1, and. This study is a contribution to the understanding of the play fairway in the anambra basin. 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 images are hyperlinks and will open up a separate window with a high resolution pdf image of the map. Onitsha, a historic port city from precolonial times, has developed as by far the largest urban area in the state. Anambra basin is one of the energyrich inland sedimentary basins in nigeria.
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. Prior to the orogeny, it was a proto basin covered by thin veneer of older sediments. 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 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. P4and itiowe k5 1,5department of geology, university of port harcourt, port harcourt, nigeria 2 dept. Biostratigraphy and paleoenvironment of the coniacian awgu. The basin is a nwse trending embayment, perpendicular to the main axis of the benue trough and the niger delta basin fig. Tectonic and sedimentation framework of the lower benue trough. The first school argued that the anambra and afikpo basins should be accorded distinct status as two independent basins, since they occurred at either flanks of the parent southern benue trough murat, 1972, hoque, 1977, whiteman, 1982. 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 areal extent maps were generated using the reports of the stratigraphic subsurface horizons of amansiodo1, ihandiagu1, igbariam1, alo1, anambra river1, akukwa1, and nzam1. Onitsha, a historic port city from precolonial times is the largest urban area in the state.
1199 967 141 979 1182 155 1337 194 1334 1072 28 103 1276 461 562 457 1611 662 323 129 1015 67 215 1426 887 1376 680 1185 463 429 1605 1487 826 1176 900 546 1159 266 1475 1309 665 20 1493 1495 567 928