International Journal of Innovation and Scientific Research ISSN 2351-8014 Vol. 22 No. 1 Apr. 2016, pp. 72-89 © 2015 Innovative Space of Scientific Research Journals http://www.ijisr.issr-journals.org/ Corresponding Author: Laila SALAMA 72 Apport de la modélisation géologique 3D à l’exploration minière: Etude de cas du gisement de Draa Sfar (Jbilets centrales, Maroc) [ Mining exploration using 3D geological modeling: Draa Sfar deposit’s case study (Central Jbilets, Morocco) ] Laila SALAMA 1-2 , El Mostafa MOUGUINA 2 , Abderrazak NAHID 3 , Essaid EL BACHARI 4 , Mohamed OUTHOUNJITE 1 , Mohamed ESSAOUDI 1 , Lhou MAACHA 1 , Mohamed ZOUHAIR 1 , and Aomar EN NACIRI 1 1 Service Géologie, Compagnie Minière de Guemassa, Marrakech, Maroc 2 Laboratoire Dynamique de la Lithosphère et Genèse de Ressources Minérales et Energétiques (DLGR), Université Cadi Ayyad, Faculté des Sciences Semlalia, Marrakech, Maroc 3 Laboratoire GeoHyd. Département de Géologie, Faculté des Sciences Semlalia UCA, Marrakech, Maroc 4 Laboratoire d'Ingénierie des Systèmes d’information (LISI), Faculté des Sciences Semlalia UCA, Marrakech, Maroc Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. ABSTRACT: The Draa Sfar mine is one of the important deposits in the western Meseta of Morocco (10Mt @ 5% Zn, 2% Pb, 0.33% Cu). This deposit is the Volcanogenic Massive Sulphide type (VMS). It’s located on the southern edge of the Hercynian Centrals Jebilets Massif. The mineralization is hosting in the Upper Visean-Namurian age and associated with rhyodacitic rocks. To understand the spatial distribution of basic metals and the zoning of hydrothermal alteration, on the scale of the deposit, we used two 2D-3D modeling software; Vulcan and Surfer. The software Vulan showed us the flat shape of the mineralized megalens which is continuous and more or less distorted. In the northern part of the deposit, the mineralized lenses appeared superimposed level with the distinction of roof and wall formations. Vulcan also showed a southern block Zn-Pb- rich, a northing block Cu-Co (Au)-rich, and a center block which is the intermediate zone. Moreover, the software Surfer established longitudinal and cross sections of the same values, the same power and the same cut off grade of the major elements. He has shown the high deep power areas in the southern block and characteristics of hydrothermal alteration zones. The results of modeling obtained by Vulcan and Surfer are a contribution to the exploitation of the Draa Sfar mine while ensuring its development and sustainability of its activity. They could also constitute guides for the exploration of similar deposits in the Jebilets-Guemassa metallogenic province. KEYWORDS: Modeling; Vulcan; Surfer; spatial distribution; hydrothermal alterations; volcanogenic massive sulphide; Draa Sfar; Central Jebilet; Morocco RESUME: La mine Draa Sfar compte parmi les gisements les plus importants de la meseta occidentale marocaine (10Mt @ 5% Zn ; 2% Pb ; 0,33% Cu). Ce gisement est localisé sur la bordure sud du massif hercynien des Jebilets Centrales. La minéralisation, associée à des roches rhyodacitiques, est de type amas sulfuré volcanogène (ASV), dans un encaissant d’âge Viséen supérieur-Namurien.