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Subsurface Characterization for Geotechnical and Civil engineering suitability using Ground magnetic and Electrical Resistivity Surveys in Ilishan Remo, Sedimentary terrain, Nigeria

Authors: ADENIKA Charles Itunu

Publication Type: Journal article

Journal: Actasatech - Journal Of Life And Physical Sciences

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Abstract

This study integrated magnetic and electrical resistivity investigation to characterize and evaluate the subsurface materials and recognize geologic features (faults/fractures/contacts) that may affect foundation stability in Ilishan Remo, a sedimentary terrain in southwestern Nigeria. Three traverses were established for ground magnetic and 1D Schlumberger Vertical Electrical Sounding (VES) surveys. The magnetic data were corrected for diurnal variations and offset, and processed into profiles. The profiles identified geologic structures (fault/fracture/contact zones) that often associated with weak zones that can compromise the integrity of civil engineering foundations underneath the examined traverses. The VES data were interpreted to reveal a typical subsurface sequence of topsoil, lateritic layer, clayey sand/sand, sand/sandstone. Results indicated that zones underlain by competent lateritic and clayey sand materials with relatively high resistivity values (> 300 Ωm) and high thickness values are more suitable for foundation purposes. Conversely, areas characterized by low resistivity values (< 200 Ωm), indicative of clayey or water-saturated materials, were identified as geotechnically weak and unsuitable for shallow foundation systems without improvement. Structural anomalies detected in the magnetic profiles corresponded with areas of low resistivity and thicker weak layers, confirming their geotechnical significance.

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ADENIKA,C.I . (2025). Subsurface Characterization for Geotechnical and Civil engineering suitability using Ground magnetic and Electrical Resistivity Surveys in Ilishan Remo, Sedimentary terrain, Nigeria , 17 (2), 15-15.

ADENIKA,C.I . "Subsurface Characterization for Geotechnical and Civil engineering suitability using Ground magnetic and Electrical Resistivity Surveys in Ilishan Remo, Sedimentary terrain, Nigeria " 17, no (2), (2025): 15-15.

ADENIKA,C.I and . (2025). Subsurface Characterization for Geotechnical and Civil engineering suitability using Ground magnetic and Electrical Resistivity Surveys in Ilishan Remo, Sedimentary terrain, Nigeria , 17 (2), pp15-15.

ADENIKACI, . Subsurface Characterization for Geotechnical and Civil engineering suitability using Ground magnetic and Electrical Resistivity Surveys in Ilishan Remo, Sedimentary terrain, Nigeria . 2025, 17 (2):15-15.

ADENIKA,Charles Itunu, . "Subsurface Characterization for Geotechnical and Civil engineering suitability using Ground magnetic and Electrical Resistivity Surveys in Ilishan Remo, Sedimentary terrain, Nigeria ", 17 . 2 (2025) : 15-15.

A.Charles Itunu , "Subsurface Characterization for Geotechnical and Civil engineering suitability using Ground magnetic and Electrical Resistivity Surveys in Ilishan Remo, Sedimentary terrain, Nigeria " vol.17, no.2, pp. 15-15, 2025.

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