Amoka, I.S.Jatau, B.S.2023-12-142023-12-142010-07-05Champati Ray, P.K.: GIS in Geoscience: The Recent Trends. Geospatial Application Papers, http://beta.gisdeveIopment.net Thurston, J.: GIS & Artificial Neural Networks: Does Your GIS Think? GISCafe.com (2002) Mukhopadhyay, B. Saha, A., Hazra, N.: Knowledge Driven GIS Modelling Techniques for Copper Prospectivity Mapping in Singhbhum Copper Belt http://beta.gisdcvelopment.net, Map India (2003) ESRI: What is GIS? http://www.gis.com/ the Guide to Geographic Information Systems Escobar, F., Hunter, G., Bishop, I., Zerger, A.: Introduction to http://www.sli.unimclb.cdu.au (2010) Tew, B.H., Osborne, W.E.: Digital Geologic Mapping Program at the Geological Survey of Alabama, U.S. Geologic Survey Open-File Report 97-269 (1997)https://keffi.nsuk.edu.ng/handle/20.500.14448/5682Delineation and evaluation of mineral resources are major exploration parameters required for investment decisions. In Nigeria, however, there is acute shortage of such data to ensure rapid mineral development. Recent integration of exploration data with GIS, supported by intelligent systems, has greatly enhanced the acquisition, analysis and interpretation of complex problems of probabilities and decisions involved in mineral projects. Geophysical studies and mineral reserves estimation have been undertaken to illustrate major areas of GIS application in Nigeria’s mineral industry. Resistivity profiles from Ungwar-Doka and Rafin-Gabas, North-central part of Nigeria, were digitized into GIS to delineate tourmaline and chalcopyrite resources. Drill-hole data from Malori and Gurjaji in north-eastern Nigeria were used to generate isopach maps of gypsum quantities from which the reserves were calculated. The results demonstrate the potential of the GIS in speedy and reliable execution of mineral exploration projects.enGIS; mineral exploration, geophysical survey, tourmaline, reserves estimation, gypsumArticle