Organic geochemical appraisal of limestones and shales in part of eastern Dahomey Basin, southwestern Nigeria

Nton, M. E.

doi:10.4314/jmg.v40i1.18806

Cited by 29 publications

(36 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These notably include those of Jones and Hockey (1964); Omatsola and Adegoke (1981); Billman (1992), Elueze and Nton (2004). The stratigraphy of Cretaceous to Tertiary sedimentary sequence of the eastern Dahomey basin can be divided into: Abeokuta Group, Imo Group, Ilaro Formation, Coaster plain sands and Recent alluvium.…”

Section: Geologic Units Within the Dahomey Basinmentioning

confidence: 99%

Geo-electrical investigation of Leachate Impact on Groundwater: A Case Study of Ile- Epo Dumpsite, Lagos, Nigeria

Adeoti¹,

Oladele²,

Ogunlana³

2011

Journal of Applied Sciences and Environmental Management

View full text Add to dashboard Cite

ABSTRACT:In the past few decades, disposal sites have been filled with household refuse and different kinds of potentially dangerous industrial waste in an uncontrolled manner which poses an enormous risk for the environment, and are the main sources for groundwater contamination. With the aim of assessing impact of leachate on the underlying aquifers by determining and delineating possible leachate infiltration into the aquifer matrix ,Constant Spacing Traversing (CST) was carried out using Wenner array and spacing between 10-60 m along four 160 m -180 m profiles. The results revealed the aquifer is characterized by low resistivity response generally below 4.5 ohm-m depicting possible contamination of the underlying aquifer from Oke-Odo landfill. The surface of the waste landfill is characterized by differential decomposition of waste as zones of advanced decomposition and fresh waste are reflected as low and high resistivity respectively. The absence of leachate in the aquifer 100 m from the studied area suggests that the leachate has not spread to this area, therefore, safe for groundwater exploitation. This study demonstrated the expeditiousness and effectiveness of the resistivity technique as a tool for geo-environmental mapping of leachate. @JASEM

show abstract

Section: Geologic Units Within the Dahomey Basinmentioning

confidence: 99%

Geo-electrical investigation of Leachate Impact on Groundwater: A Case Study of Ile- Epo Dumpsite, Lagos, Nigeria

Adeoti¹,

Oladele²,

Ogunlana³

2011

Journal of Applied Sciences and Environmental Management

View full text Add to dashboard Cite

show abstract

“…Lagos State is basically a sedimentary area located within the western part of Nigeria, a zone of coastal creek and lagoon (Elueze and Nton 2004). The area is also developed by barrier beaches associated with sand deposits (Ogbe 1972).…”

Section: Geology and Hydrogeologymentioning

confidence: 99%

Integrated geophysical and physicochemical assessment of Olushosun sanitary landfill site, southwest Nigeria

2014

View full text Add to dashboard Cite

An integrated surface geophysical and physicochemical study involving 2-D electrical resistivity imaging (terrain conductivity measurement using EM34-3) complimented with measurement of some physical parameters was conducted at Olushosun sanitary landfill site in Lagos metropolis, southwestern Nigeria, with the aim of investigating the lateral extent and depth of the possible subsurface leachate contamination plumes (electrically conductive anomalies) within the area. Fourteen 2-D resistivity imaging lines were investigated with a maximum spread length of 249 m per line. The result of the resistivity imaging delineated the contaminant plume as low-resistivity zones (0.24-36Ωm) to a maximum depth of 59 m. The electrical resistivity tomography (ERT) lines were projected to produce stacked block models of the site which show southeast flow pattern of the leachate and, possibly, the groundwater flow direction. Eleven electromagnetic (EM) profiles were established with a maximum spread length of 150 m per profile using both the vertical and horizontal dipole configurations to measure terrain conductivity of the study area; 10, 20, and 40 m coil separations were deployed for the measurement. Qualitative interpretation of the EM34-3 data reveals high conductivity range of values (30-264 mmho/m) within the dumpsite as compared to conductivity values ranging between 4 and 26 mmho/m for the control site. It delineated the vertical extent of the contaminated zones up to a maximum depth of about 30 m (horizontal dipole configuration) and a maximum depth of about 60 m (vertical dipole configuration). Physicochemical analysis of the water samples taken from wells and boreholes within the precinct of the dumpsite reveal an elevation in concentrations of total dissolved solid (TDS) (range of 513-2,000 mg/l) and electrical conductivity (EC) (range of 1,019-3,999 μS/m) in wells 4, 7, 10, 11, 15, 16, and 19 with the values obtained moderately above the WHO standards. The pH obtained from water samples indicates high acidic content (5.34-6.85). These possibly indicate contamination of the groundwater as a result of solid waste leachate accumulation, thus complimenting the geophysical data. Leachate flow direction was generated from the increasing concentration of TDS and EC in southeast direction which agrees with similar flow pattern deduced from ERT results.

show abstract

“…The rocks of the Benin Basin are mainly sands and shales with some limestone which thicken towards the west and the coast as well as down dips to the coast (Oteri and Atolagbe, 2003). The stratigraphic description of sediments in the basin has been provided by various authors (Elueze and Nton, 2004;Nton, 2001;Okosun, 1990;Omatsola and Adegoke, 1981;Ako et al, 1980). Five lithostratigraphic formations covering the cretaceous to Tertiary ages have been described.…”

Section: Description Of the Geology Hydrogeology And Geomorphology Omentioning

confidence: 99%

Geophysical study of saline water intrusion in Lagos municipality

Oladapo¹,

Ilori²,

Adeoye-Oladapo³

2014

Afr. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Saline water intrusion presently constitutes serious concerns in the Lagos municipality just like many other coastal cities, thus necessitating its intervallic study. The present study involving 52 borehole logs (consisting of natural gamma and electrical resistivity components) was aimed at delineating intruded and vulnerable zones. Saline water columns defined by low resistivity values in the range of 0.1 and 20 Ωm as compared to fresh water (≥ 100 Ωm) were delineated on 22 logs. Four of the geosections generated in this study indicate saline water intrusion at depths varying from surface in Satellite Town,

show abstract

Organic geochemical appraisal of limestones and shales in part of eastern Dahomey Basin, southwestern Nigeria

Cited by 29 publications

References 0 publications

Geo-electrical investigation of Leachate Impact on Groundwater: A Case Study of Ile- Epo Dumpsite, Lagos, Nigeria

Geo-electrical investigation of Leachate Impact on Groundwater: A Case Study of Ile- Epo Dumpsite, Lagos, Nigeria

Integrated geophysical and physicochemical assessment of Olushosun sanitary landfill site, southwest Nigeria

Geophysical study of saline water intrusion in Lagos municipality

Contact Info

Product

Resources

About