International Research Journal of Innovations in Engineering and Technology - IRJIET International Open Access, Monthly, Peer Reviewed, Reputed Journal ISSN (online): 2581-3048

Impact Factor (2025): 6.9

DOI Prefix: 10.47001/IRJIET

Two-Dimensional Modelling of Subsurface Magnetic Lithology in Sokoto Basin, Northwestern Nigeria

Abstract

Two dimensional (2D) modelling of the subsurface lithology in the subsurface of Sokoto Basin, north-western Nigeria has been carried out using the area’s aeromagnetic map. The modelling was aimed at investigating the potentiality of the area for mineral exploitation especially hydrocarbon even as a sedimentary and marine environment. The Basin covers an estimated area of 59,570 km2 which falls within 0.5o by 0.5o in Nigeria national grid. Three survey straight lines trending NW-SE and cutting across some anomalous zones in the area’s residual aeromagnetic map were selectively drawn for the modelling and interpretation. With the aid of GM-SYS Software Version 2.5D, the two dimensional models of the subsurface sediments and basement rocks. The results of the modelling showed that the area characterized by Cretaceous sediment of single lithology in the range of about 250 m to 400 m thick. The resulting model also showed a magnetic basement characterised by various lithology of rugged topography, dipping north-westwards of the study area. The interpreted model of the basement comprises igneous rocks such as Gabbro, Granite, Andesite, Schists, Rhyolite, Pyroxenite, Phylites, and Esites. The sediment-filled troughs and depressions on the basement’s surface suggest that they could be good targets for groundwater. Also, several solid minerals could be exploited based on the modelled multi lithology magnetic basement.   However, the maximum depth to the basement troughs suggests that the requirements for formation of hydrocarbon have not been met in the area; therefore its exploitation is not feasible in the Basin.

Country : Nigeria

1 Egwuonwu. G. N.2 Ezeh. O. C.3 Jegede. S. I.4 Umego. M. N.

  1. Department of Physics and Industrial Physics, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
  2. Nigerian Geological Survey Agency, Utako Abuja FCT, Nigeria
  3. Department of Physics, Faculty of Physical Sciences, Ambrose Alli University, Ekpoma, Edo State, Nigeria
  4. Department of Physics, Chukwemeka Odimegwu Ojukwu University, Uli, Awka, Anambra State, Nigeria

IRJIET, Volume 5, Issue 1, January 2021 pp. 40-45

doi.org/10.47001/IRJIET/2021.501005

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