SUMMARY
At Owanoba area, the resistivity of the topsoil varies from 1309 - 5377 Ωm at depth of 0 to 2.5 m, sandstones and shale (1807 – 5377 Ωm) at depth of (5 m, 10.8 m, 25 m and 33.7 m), lateritic soil (341 – 1722 Ωm) (5 m, 10.8 m, 25 m and 33.7 m). In Obaretin study area, the resistivity of the topsoil (silt) ranges from 489 – 1696 Ωm at depth of 0 to 2.5 m, clayey sand (648 – 1313 Ωm) with corresponding depth of (5 m, 10.8 m, 25 m and 33.7 m), lateritic sand with sandstones (732 – 2484 Ωm) at depth of (5 m, 10.8 m, 25 m and 33.7 m), clayey sand. (108 – 656 Ωm) at depth of (5 m, 10.8 m, 25 m and 33.7 m).
The Horizontal depth slices obtained from the 3D inverted resistivity structure at Obaretin was able to probe 33.7 m. It shows the subsurface in an x – y direction with resistivity values ranging from 49.8 - 3253 Ωm across the depth slice. The horizontal depth slice is representative of silt sand, lateritic sand with sandstones intercalations. In Owanoba, the Horizontal depth slices was able to probe 33.7 m beneath the subsurface with resistivity values ranging from 807 - 6449 Ωm across the depth slice. The slice is indicative of lateritic sand, sandstones with shale intercalations.
The Resistivity lithology of the study areas showed three geoelectric subsurface to appreciable depth of 40 m; lateritic topsoil (807 – 1462 Ωm), sandstones with shale intercalations (1462 – 4793 Ωm), and lateritic sand (1462 – 2647 Ωm) in location 1. Silt sand topsoil (299 – 1791 Ωm), lateritic sand with sandstones intercalations (985 – 3253 Ωm), and clayey sand (48.9 – 1791 Ωm) in location 2. The lithology corroborates with borehole log within the environs.
