Geology and Hydrogeology of Part of Suleja North Central Nigeria

Abstract

A study on the geology and hydrogeology of part of Suleja north central Nigeria was carried out using geological and hydrogeological mapping and electrical resistivity method of geophysical surveys. The study area was divided into portions of almost equal parts to aid easy identification naming and identification of samples. Rock samples were collected and thin sections were produced from these samples. Thirty six (36) hand dug wells were examined for static water level measurements while only fifteen of the water samples were examined in the laboratory for chemistry and bacteriological content. Sixty four (64) Vertical Electrical Soundings (VES) were also carried out using the Schulumberger array. Two major rock types were identified in the area and they are Gneiss and Granite. The water chemistry test showed little dissolution of the rock constituent in the water but rather the effect of sewage, pit latrines and waste water sources situated around the wells in some areas. Also, the vertical electrical sounding (VES) results revealed good water potentials in the larger portions of the study area. The area underlain by Granite has the lowest groundwater yield in hand dug wells as well as from the result of the Vertical electrical sounding. Groundwater occurrence and flow in the area is generally controlled by topography.