Geoelectric Quantification of Building Sand Deposits in Ogan, Edo State, Nigeria

Abstract

Electrical resistivity survey using Schlumberger electrode configuration was carried out at Ogan, Orhionwon Local Government area of Edo State, Nigeria. The survey was aimed at investigating the building sand deposits within the community. Eleven vertical electrical ssoundings (VES) were carried out in the survey. The data got from the field were analsed using the conventional curve matching and iteration techniques where the model parameters and curves were obtained. The geoelectric parameters and litholgic delineation at Ogan of six layers consisting of lateritic topsoil, clayey sand, fine medium sand, medium sand, medium to coarse and coarse sand. The result shows that from the third down to the fifth layers is made up of sand indicating considerable quantity of sand. The investigated area was of a triangular block. The analysis shows that reserve of building sand deposit was established as 1520559767kg (1520559.8 tonnes). The deposits could be mined economically for domestic purposes. Keywords: Sand deposits, vertical electric soundings, Ogan, topsoil, geoelectric parameters.