Research Papers/Topics in Applied Geophysics
Geochemical Characterisation Of Soils And Sediments From Onitsha Metropolis, Southeastern Nigeria
ABSTRACTStudies on the distribution, sources and impacts of Heavy Metals (HMs) and PolycyclicAromatic Hydrocarbons (PAHs) in soils and sediments of Urbanised Industrialised Cities (UICs)are integral part of environmental monitoring programme globally. Results from such, have beenused to design appropriate mechanisms for the sustainable use of environmental media.However, several Nigerian UICs, such as Onitsha, the most industrialized city SoutheasternNigeria, have not been adequately studied....
Geoelectric Evaluation of Groundwater Potential: a Case Study at Omuma Local Government Area, Rivers State, Nigeria
Rivers State as the nomenclature depicts is a state richly blessed with both surface and subsurface water. As a result of this, there is less problem of water scarcity, especially in the elite cities of the state, but so many other communities due to one reason or the other still wallow in abject water scarcity. In this survey, a total of seven (7) vertical electric soundings were carried out using Schlumberger configuration at Obibi community in Omuma local government area, Rivers State, ...
Determination of Ground Water Potential Using Electrical Resistivity Method
A resistivity survey was carried out to study groundwater potential in Ignatius Ajuru University of Education in Rumuolumini Town, Rivers State of Nigeria with the aim of determining the depth, thickness, resistivity and lithology at which potable water can be obtained. Two Vertical Electrical Soundings were conducted using the Schlumberger configuration. The VES data were subjected to an iteration software (IPI2WIN) which showed that the area is composed of top soil, clay, mud and sand. B...
Geoelectrcal tomographic evaluation of the subsurface conditions of Dutse model and it environs,Dutse, Jigawa State,Nigeria using 2D Electrical Resistivity imaging
The study gives an overview on the utility of two dimensional direct current resistivity methods to explore the subsurface condition of Dutse Model International School and its Environs. Four parallel profiles each of length 200m and separated 120m apart were established. Currents and corresponding voltages were collected for the various investigating points with electrode spacing ranging from 5 to 60m. The collected data was reduced to resistivity values and then arranged in Notepad in a for...
GEOLOGICAL WIRELINE LOGS AND THEIR APPLICATION
ABSTRACTWireline logging is a veritable tool for the determination of hydrocarbon beneath the subsurface, it is applied by prospecting companies hence, this work studies geological wireline logging and their application in oil and gas reservoir beneath the earth’s surface. Wireline logging is performed by lowering a logging tool of one or more instruments on the end of a wireline into an oil well and recording petro physical properties using a variety of sensors. This logging process is aid...
Geo Electrical Assessment of Groundwater Potentials of Some Parts of Orsu and Environs, South Eastern Nigeria
ABSTRACTIn a bid to determine the groundwater potential of some parts Orsu and environs, which lies within latitude N5º53.858΄ to N5º47.572΄ and longitude E7º0.847΄ to E6º56.988΄, a total of ten (10) vertical electrical soundings were carried out. The study area belongs to the Anambra basin which is one of Nigeria’s most important hydrological basins. It is overlain by the Miocene to recent Benin formation and Eocene Ameki formation.Equipment such...
Interval Velocity Estimations from Seismic Reflection Data
ABSTRACTThe research project was carried out to study the estimations of interval velocity from seismic reflection data of the acoustic P waves inside the Earth using the method of time migration which is necessary for obtaining seismic images in regular Cartesian coordinates. The main goals of the research work were to develop algorithms to convert time-migration velocities to true seismic velocities, and to convert time-migrated images to depth images in regular Cartesian coordinates....
Integrated geophysical investigation of foundation condition beneath a site earmarked for a civil engineering construction project
Geophysical investigation involving the electrical resistivity method was carried out at a site earmarked for construction of a Lecture Theatre at the Obafemi Awolowo University Teaching Hospital Complex (OAUTHC) in Ile-Ife, Osun State Nigeria. The aim was to generate 2-D subsurface images beneath the site which will provide the required geological information for location and design of the building foundation. The geophysical investigation involved the 2-D imaging technique which utiliz...
DEPTH TO MAGNETIC SOURCE ANALYSIS USING SOURCE PARAMETER IMAGING (SPI), ANALYTICAL DEPTH AND SPECTRAL DEPTH ESTIMATES
Four sheets of aeromagnetic data, which are the aeromagnetic map of Nsukka, Udi, Nkalagu, and Igunmale were obtained from the Nigerian Geological Survey Agency, these areas are within the Lower Benue trough and Anambra Basin, Southeast of Nigeria. Oasis Montaj 6.4.2, ArcGIS 10.2.2, Surfer 11, and Excel 2016 software, were used in the processing and interpretation of the aeromagnetic data obtained qualitatively and quantitatively. The results of the qualitative interpretation on application of...
GEOPHYSICAL INVESTIGATION OF SHARE, TSARAGI AND YIKPATA IN KWARA STATE, NIGERIA.
This report describes the acquisition, processing, and results of the University of Ilorin Department of Geophysics 2019 Summer Field Camp. From 4th of April through 7th of April, a team of undergraduate students from the University of Ilorin, along with lecturers and department technicians conducted a series of geophysical surveys at Share, Tsaragi and Yikpata area in Kwara state. In...
Application of Very Low Frequency (VLF) Electromagnetic method to mineral exploration (Mining Geophysics) with case study review.
The Very Low Frequency Electromagnetic (VLF-EM) method, which enables surveying without contact with the ground, is suitable for ground surveys in a wide area and has been used in mapping geology and in mineral exploration for decades. The technique makes use of signal radiation from military navigation radio transmitters operating in the frequency range of 15-30 kHz. When the electromagnetic wave impinges on the surface it is both reflected back into the air and refracted into the earth. By ...
MAPPING OF MAGNETIC ANOMALIES IN SOME PARTS OF NIGERIA CHAD BASIN, USING AEROMAGNETIC DATA
ABSTRACTAeromagnetic data over some part of the Chad Basin, Nigeria was analyzed. The aeromagnetic anomaly map, its qualitative and quantitative interpretation helped in identifying the nature and depth of the magnetic sources in the study region. The regional-residual separation was performed with a first order polynomial using oasis montaj software. The residual data obtained was contoured into 3-D maps and this revealed two prominent magnetic anomaly source intensities; the low fre...
Interpretation of Geoelectric Pseudo-Section of a Profile Across a Functional Borehole Located in-between Two Non-Functional Dug-Well
Groundwater exploration
GEOELECTRICAL INVESTIGATION OF GROUNDWATER POTENTIAL OF ADMINISTRATIVE BLOCK AT PERMANENT SITE, FEDERAL UNIVERSITY DUTSIN-MA, KATSINA STATE, NIGERIA
Abstract A geophysical survey for groundwater resources was carried out in the administrative block of Federal University Dutsin-Ma, permanent site. This was successfully done by employing the electrical resistivity method to investigate the water table variations, the depth to basement, thickness of weathered basement, thickness of aquifer and area suitable for boreholes establishment within the areas covered wit...
Geophysical Investigation of the Causes of Borehole Failure in the Crystaline Basement Complex: A Case Study of Kaura Area of Kaduna State, Nigeria
Abstract Vertical Electrical Soundings (VES) using Schlumberger array were carried out at different points along five (5) profiles. This research investigates the causes of massive borehole failure at Kaura area of Kaduna state using the resistivity tomography techniques. Terrameter SAS300 is the instruments used to acquire the data. A total of 19 boreholes are functioning, while 31 boreholes are non-functioning within th...