Seismic Refraction Investigation of the northern part of the Niger State College of Education Minna, Nigeria

Abstract

Niger State College of Education Minna, lies in a basement complex terrain. A three-channel seismograph was used for the survey. The profiles were marked at 100 m intervals, while the profiles lines traversed 1000 m (1 km). A total of 66 spreads were shot. Data were collected, time – distance curves drawn, velocities of the underlying layers obtained and depths to the refractor layer computed. The results obtained gave an overview of the lateral variation in the lithological changes of the subsurface earth materials in the surveyed area. The basement surface varied in depth, from depths as shallow as 2.02 m to a maximum of 10.83 m. The rock materials identified in the surveyed area are chiefly sand, saturated clay, gravel, and granite.