Geophysical study of Ubiaja and Illushi area in northern Anambra basin, Nigeria, using combined interpretation methods of aeromagnetic data

Okorie, Alexius Chukwudi; Obiora, Daniel N.; Igwe, Emmanuel

doi:10.1007/s40808-019-00592-0

Cited by 5 publications

(5 citation statements)

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“…Several published works on the interpretation of aeromagnetic data over the entire Anambra Basin and Lower Benue Trough were conducted using different methods (Onwuemesi 1997;Adetona and Abu 2013;Ofoha 2015;Obiora et al 2015;Ekwueme et al 2018;Okorie et al 2019;Yakubu et al 2020). However, no specific works had been carried out in the present area of study as a sub-region in Anambra Basin.…”

Section: Introductionmentioning

confidence: 98%

“…Further, they employed forward and inverse modeling methods and obtained depth ranging from 461 to 6847 m for five profiles taken in the area. Okorie et al (2019) carried out a qualitative and quantitative interpretation of aeromagnetic data over Ubiaja and Illushi area in northern Anambra Basin, Nigeria, using combined methods. They reported that the area was vastly faulted with major anomalies (faults) trending in the NE-SW direction.…”

Section: Introductionmentioning

confidence: 99%

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Mapping of subsurface structural features in some parts of Anambra Basin, Nigeria, using aeromagnetic data

Oguama

Okeke

Obiora

2020

Model. Earth Syst. Environ.

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Aeromagnetic data of some parts of Anambra Basin, Nigeria, covering Illushi, Nsukka, Igumale, Onitsha, Udi and Nkalagu areas were digitally processed, analyzed and interpreted qualitatively and quantitatively. The study was carried out to delineate the subsurface structural lineaments/trends that provide the locales for mineral deposit and hydrocarbon resources and to estimate the depth to magnetic sources/sedimentary thickness of the area. The data were qualitatively interpreted using reduction to equator-inverted (RTE_INV), vertical derivatives (VD), tilt derivative (TDR) filter, lineament density filter and Rose plot. Quantitative interpretation was done using source parameter imaging and Euler deconvolution methods. The results depicted that the study area has enormous structural lineaments especially in the northeast and northwest that showed a high cluster of these lineaments. The results showed that the trends of the structural lineaments have a dominance of NE-SW direction, with ancillary trends in E-W, NW-SE, N-S, NNE-SSW and ENE-WSW directions. The SPI depth result ranges from 318.45 m for shallow magnetic sources to − 11,253 m for sedimentary thickness. The 3D Euler deconvolution depth estimate revealed depths to magnetic sources ranging from − 400 to − 4300 m. The results show good evidence of the presence of the essential factors for the exploration of both mineral deposits and hydrocarbon resources in the study area.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Mapping of subsurface structural features in some parts of Anambra Basin, Nigeria, using aeromagnetic data

Oguama

Okeke

Obiora

2020

Model. Earth Syst. Environ.

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“…Interpretation of aeromagnetic data for several purpose is no longer news around the world. Several authors (Yakubu et al, 2020a;Yakubu et al, 2020b;Obiora et al, 2016;Edeh et al, 2017;Obiora et al, 2021;Ekwueme et al, 2017;Okorie et al, 2019;Oguama, et al, 2021 etc. ) have worked in the lower Benue trough with fewer aeromagnetic data sheets.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Estimation of Sedimentary Thickness for Hydrocarbon and Other Minerals Prospecting Within the Lower Benue Trough, Nigeria Using Airborne Geophysical Data

J.A.,

F.N.,

D.N.

et al. 2023

geos.res.j

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The stratigraphic, tectonic and organic geochemical development of Lower Benue trough and Anambra basins is similar to the basin of Sudan, Chad and Niger Republic where oil has been discovered. In addition, coal is mined in some parts of the study area (Ankpa), in some villages such as Okobo, Odagbo, Agumagu, Onupi, Awoakpalii, etc. This research work is aimed at modeling and estimating the sedimentary thickness within the area and hence remark on the hydrocarbon, coal and other mineral potential in the area using source parameter imaging (SPI) and forward and inverse modeling method. This will be of great help to the people digging manually to look for those minerals. The depth to the magnetic source/sedimentary thickness ranges from 220.0 to 3705.4 m as revealed by the SPI result. This variation may be as a result of the heterogeneous nature of the earth, intrusive or the different type of bodies within the subsurface. Modeling results depicted that the depth to the magnetic source of 820 m, 4229 m, 1957 m, 406 m, 400 m, 755 m and 4229 m for profiles 1, 2,3, 4, 5, 6 and 7 respectively. The result of forward and inverse modeling method with the susceptibility values showed that there is dominance of sandstone, limestone, granite and slate within the study area, though, susceptibility value is only an indicator which is subject to confirmation by using laboratory analysis and other geophysical methods. The depth obtained favours hydrocarbon accumulation potential in the study area.

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“…1a, Obaje, 2009). During the last few decades, due to its high potential for hydrocarbon exploration, the basin has attracted a variety of studies that used a wide range of geological and geophysical methods (Agagu and Adighije, 1983;Cratchley et al, 1984;Benkhelil, 1989;Onwuemesi, 1997;Abbass and Mallam, 2013;Adetona and Abu, 2013;Obiora et al, 2015;Abdullahi and Singh, 2018;Ekwueme et al, 2018;Obasi et al, 2018;Okorie et al, 2019;Oguama et al, 2020). A first power spectrum analysis of magnetic data showed varying thicknesses of sedimentary deposits within the basin between 0.9 and 5.6 km (Onwuemesi, 1997).…”

Section: Introductionmentioning

confidence: 99%

“…Ekwueme et al (2018) carried out a study in the region of Idah and Angba that depicts a magnetic source depth between 2.2 km and 6.8 km. The Ubiaja and Illushi regions have a NE-SW structural trend of magnetic anomalies with depths varying between 3 and 5.5 km (Okorie et al, 2019). Most recently, Oguama et al (2020) used magnetic data to study the structural lineaments at the eastern margin of the Anambra Basin.…”

Section: Introductionmentioning

confidence: 99%

Structural interpretation of the south-western flank of the Anambra Basin (Nigeria) using satellite-derived WGM 2012 gravity data

Omietimi

Chouhan

Lenhardt

et al. 2021

Journal of African Earth Sciences

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Geophysical study of Ubiaja and Illushi area in northern Anambra basin, Nigeria, using combined interpretation methods of aeromagnetic data

Cited by 5 publications

References 6 publications

Mapping of subsurface structural features in some parts of Anambra Basin, Nigeria, using aeromagnetic data

Mapping of subsurface structural features in some parts of Anambra Basin, Nigeria, using aeromagnetic data

Modeling and Estimation of Sedimentary Thickness for Hydrocarbon and Other Minerals Prospecting Within the Lower Benue Trough, Nigeria Using Airborne Geophysical Data

Structural interpretation of the south-western flank of the Anambra Basin (Nigeria) using satellite-derived WGM 2012 gravity data

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