Hydrocarbon potential of Cretaceous sediments in the Lower and Middle Benue Trough, Nigeria: Insights from new source rock facies evaluation

Akande, Samuel O.; Egenhoff, Sven; Obaje, Nuhu George; Ojo, Olusola J.; Adekeye, Olabisi A.; Erdtmann, Bernd-Dietrich

doi:10.1016/j.jafrearsci.2011.11.008

Cited by 59 publications

(49 citation statements)

References 23 publications

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“…Palynological study carried out by them, indicated the presence of diagnostic pollen and spores such as Afropollis jardinus, Cretacaeiporate pollen such as Cretacaeiporates mulleri, C. scabratus, C. polygonalis, Steevesipollenites binodosus, Galeocornea sp, and Hexaporoticolpites emelianovi, which are all Albian to Lower Cenomanian group of forms. [6] indicated that thinner shale successions of Asu River Group, the Eze-Aku and Awgu Formations are reported in oil exploratory wells in the younger Anambra Basin and also in the marginal areas to the Abakaliki Basin.…”

Section: Stratigraphy Of Southern Benuementioning

confidence: 98%

“…The deposits of the transgressive Nkporo cycle was overlain by the Lower Maastrichtian sandstones, shales, siltstones and mudstones, and the interbedded coal seams of the deltaic Mamu Formation in most parts of the Anambra Basin [6]. The Mamu Formation was deposited as the broad shallow sea that existed at the time of deposition of the Nkporo/Enugu Formations, gradually became shallower.…”

Section: The Mamu Formationmentioning

confidence: 99%

“…The Ogwashi-Asaba Formation comprises of alternating coarse grained sandstone, lignite seams, and light coloured clays of continental origin [13]. The age of the formation was suggested by [2,6,15], to be of OligoceneMiocene, although palynological study by [48] yielded a Mid Eocene age for the basal part. The Ameki Group and the overlying Ogwashi-Asaba Formation in the Southern Benue Trough and Anambra Basin are correlative with the Agbada Formation in the Niger Delta.…”

Section: The Ogwashi-asaba Formationmentioning

confidence: 99%

“…Early works of [1,2,3,4], and others, which formed the basis for the stratigraphic study of these basins were employed, but were updated by recent reputable works of [5,6,7,8,9,10] and others. The geologic formations encountered in the basins include: the Asu River Group, Eze-Aku Group, Agbani Sandstone/Awgu Shale Formation, Nkporo Group, Mamu, Ajalli, Nsukka, Imo, Ameki and Ogwashi-Asaba Formations.…”

mentioning

confidence: 99%

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The Southern Benue trough and Anambra Basin, Southeastern Nigeria: A Stratigraphic Review

Kelechi

2017

JGEESI

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A review of high impact literature on the Southern Benue Trough and Anambra Basin was undertaken to enhance the understanding and definition of the basins in terms of their evolution, area extent, sedimentation history, as well as their litho-bio-and sequence stratigraphy. Early works of [1,2,3,4], and others, which formed the basis for the stratigraphic study of these basins were employed, but were updated by recent reputable works of [5,6,7,8,9,10] and others. The geologic formations encountered in the basins include: the Asu River Group, Eze-Aku Group, Agbani Sandstone/Awgu Shale Formation, Nkporo Group, Mamu, Ajalli, Nsukka, Imo, Ameki and Ogwashi-Asaba Formations. Controversy surrounding the stratigraphy of the Anambra Basin, depositional environments and conditions, and age of geologic formations present in the study basins were considered. The aspect of sequence stratigraphy requires more work for a more accurate definition of stratigraphic surfaces required for the establishment of systems tracts and sequences.

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Section: Stratigraphy Of Southern Benuementioning

confidence: 98%

Section: The Mamu Formationmentioning

confidence: 99%

Section: The Ogwashi-asaba Formationmentioning

confidence: 99%

mentioning

confidence: 99%

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The Southern Benue trough and Anambra Basin, Southeastern Nigeria: A Stratigraphic Review

Kelechi

2017

JGEESI

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“…[24] indicates that geologically, the Imo shale is an outcropping unit of the subsurface Paleocene Akata Formation of the Tertiary Niger Delta in the southern fringes of the Cretaceous Anambra Basin. It is essentially a mudrock unit consisting of fine textured, dark grey to bluish grey shale with occasional admixture of clay, ironstone and thin sandstone bands and limestone intercalations [25].…”

mentioning

confidence: 99%

Geotechnical and Mineralogical Evaluation of Soils Underlying a Failed Highway Section in South Eastern Nigeria

Tse¹,

Efobo²

2016

JEASE

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Abstract:The Port Harcourt Enugu expressway is part of a national road grid that links parts of southern and northern Nigeria. The severe pavement failure between Umuahia and Okigwe section of the expressway covering a distance of about 30 km was investigated by geotechnical and mineralogical assessment of disturbed and undisturbed samples of the underlying soils. Also vertical electrical sounding was performed at the failed sections. Results indicate that the section is underlain by shales of the Imo Formation, and soils are composed of 27% and 74% sand and fines respectively. The Atterberg limit values are moderate to high, with liquid limit in the range of 49-54%, plasticity index 11.1-24.4% and linear shrinkage 17.86-23.57% respectively. Abrasion test results of 0.58 to 16% indicate shales of low durability. The 24 hour free swell tests results range from 33-70% implying soils of moderate to high hydro-affinity and volume change. These data corroborate the X-ray diffraction analyses results which show montmorillonite and kaolinite as the main clay minerals present in the soils. Undrained cohesion range from 9 to 54 kPa and frictional angle from 13° to 29°. High settlement amounts and field observation of intense failure correlated well with the engineering properties and the clay minerals. The soils indicate mainly MI-MH and A-7-5 soils on the USC and AASHTO classification system respectively, implying poor quality soils as subgrade materials. The engineering properties may be modified and upgraded by stabilisation. Result of the study will be useful in remedial works on the failed sections of the road and future pavement design in areas underlain by the shales.

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An integrated approach to the bioavailability, ecological, and health risk assessment of potentially toxic elements in soils within a barite mining area, SE Nigeria

Omeka

Igwe

Unigwe³

2022

Environ Monit Assess

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increase towards the south-eastern parts of the area. Chemometric analysis revealed that PTE enrichment in the soil is majorly influenced by anthropogenic activities. Further, bioavailability/bioaccessibility risk assessment index (BRAI) and health risk assessment models were developed to quantify the bioavailable/ human bioaccessible portion of elements in soils and the associated health risks. The BRAI ranged from high (3 ≥ 5) to very high (> 5) risk of human bioaccessibility; hence, greater amount of PTEs will be bioaccessible for absorption into the human gastrointestinal system than they would for plants uptake. The hazard index and lifetime cancer risk (LCR) revealed that most of the samples present high chronic cancer risks from dermal contact and ingestion for children and adults. The LCR values ranged between 1.0E-6 and 1.0E − 04, with the children population showing greater vulnerability to cancer risks.

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Hydrocarbon potential of Cretaceous sediments in the Lower and Middle Benue Trough, Nigeria: Insights from new source rock facies evaluation

Cited by 59 publications

References 23 publications

The Southern Benue trough and Anambra Basin, Southeastern Nigeria: A Stratigraphic Review

The Southern Benue trough and Anambra Basin, Southeastern Nigeria: A Stratigraphic Review

Geotechnical and Mineralogical Evaluation of Soils Underlying a Failed Highway Section in South Eastern Nigeria

An integrated approach to the bioavailability, ecological, and health risk assessment of potentially toxic elements in soils within a barite mining area, SE Nigeria

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