[ Apport de la modélisation géologique 3D à l’exploration minière: Etude de cas du gisement de Draa Sfar (Jbilets centrales, Maroc) ]
Volume 22, Issue 1, April 2016, Pages 72–89
Laila SALAMA1, El Mostafa MOUGUINA2, Abderrazak NAHID3, Essaid EL BACHARI4, Mohamed OUTHOUNJITE5, Mohamed ESSAOUDI6, Lhou MAACHA7, Mohamed ZOUHAIR8, and Aomar EN NACIRI9
1 Service Géologie, Compagnie Minière de Guemassa, Marrakech, Morocco
2 Laboratoire dynamique de la lithosphère et genèse de ressources minérales et énergétiques, Université Cadi Ayyad, Faculté des Sciences Semlalia, Av Abdelkrim Khattabi, B.P. 511 – 40000, Marrakech, Morocco
3 Laboratoire GeoHyd. Département de Géologie, Faculté des Sciences Semlalia UCA, Marrakech, Morocco
4 Laboratoire d'Ingénierie des Systèmes d’information (LISI), Faculté des Sciences Semlalia UCA, Marrakech, Morocco
5 Groupe Managem, Twin Center, A BP5199, Casablanca, Morocco
6 Service Géologie, Compagnie Minière de Guemassa, Marrakech, Morocco
7 Groupe Managem, Twin Center, A BP5199, Casablanca, Morocco
8 Groupe Managem, Twin Center, A BP5199, Casablanca, Morocco
9 Service Géologie, Compagnie Minière de Guemassa, Marrakech, Morocco
Original language: French
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.
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.
Author Keywords: Modeling, Vulcan, Surfer, spatial distribution, hydrothermal alterations, volcanogenic massive sulphide, Draa Sfar, Central Jebilet, Morocco.
Volume 22, Issue 1, April 2016, Pages 72–89
Laila SALAMA1, El Mostafa MOUGUINA2, Abderrazak NAHID3, Essaid EL BACHARI4, Mohamed OUTHOUNJITE5, Mohamed ESSAOUDI6, Lhou MAACHA7, Mohamed ZOUHAIR8, and Aomar EN NACIRI9
1 Service Géologie, Compagnie Minière de Guemassa, Marrakech, Morocco
2 Laboratoire dynamique de la lithosphère et genèse de ressources minérales et énergétiques, Université Cadi Ayyad, Faculté des Sciences Semlalia, Av Abdelkrim Khattabi, B.P. 511 – 40000, Marrakech, Morocco
3 Laboratoire GeoHyd. Département de Géologie, Faculté des Sciences Semlalia UCA, Marrakech, Morocco
4 Laboratoire d'Ingénierie des Systèmes d’information (LISI), Faculté des Sciences Semlalia UCA, Marrakech, Morocco
5 Groupe Managem, Twin Center, A BP5199, Casablanca, Morocco
6 Service Géologie, Compagnie Minière de Guemassa, Marrakech, Morocco
7 Groupe Managem, Twin Center, A BP5199, Casablanca, Morocco
8 Groupe Managem, Twin Center, A BP5199, Casablanca, Morocco
9 Service Géologie, Compagnie Minière de Guemassa, Marrakech, Morocco
Original language: French
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.
Author Keywords: Modeling, Vulcan, Surfer, spatial distribution, hydrothermal alterations, volcanogenic massive sulphide, Draa Sfar, Central Jebilet, Morocco.
Abstract: (french)
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. Pour comprendre la distribution spatiale des métaux de base et la zonalité des altérations hydrothermales à l’échelle du gisement, nous avons utilisé deux logiciels de modélisation 2D-3D ; Vulcan et Surfer. Le logiciel Vulan nous a montré la forme aplatie, continue et plus au moins déformée des mégalentilles minéralisées. Dans la partie Nord de ce gisement, les lentilles minéralisées apparaissent superposées en échelon avec la distinction des formations du toit et du mur. Vulcan a montré aussi un bloc sud riche en Zn-Pb, un bloc nord riche en Cu-Co (Au), et un bloc centre qui constitue la zone intermédiaire. Par ailleurs, le logiciel Surfer a établi les coupes longitudinales et transversales des isovaleurs, des isopuissances et des isoteneurs des éléments majeurs. Il a ainsi montré les zones à forte puissance dans les profondeurs du bloc sud et la caractérisation des zones d’altérations hydrothermales. Les résultats de modélisation obtenus par Vulcan et Surfer, constituent un apport à l’exploitation de la mine Draa Sfar tout en assurant son développement et la pérennité de son activité. Ils pourraient aussi constituer des métallotectes pour l’exploration de gisements similaires dans la province métallogénique des Jebilets Guemassa.
Author Keywords: Amas sulfuré volcanogène , modélisation , Vulcan , Surfe , distribution spatiale , altérations hydrothermales, Draa Sfar, Jebilets Centrales , Maroc.
How to Cite this Article
Laila SALAMA, El Mostafa MOUGUINA, Abderrazak NAHID, Essaid EL BACHARI, Mohamed OUTHOUNJITE, Mohamed ESSAOUDI, Lhou MAACHA, Mohamed ZOUHAIR, and Aomar EN NACIRI, “Mining exploration using 3D geological modeling: Draa Sfar deposit’s case study (Central Jbilets, Morocco),” International Journal of Innovation and Scientific Research, vol. 22, no. 1, pp. 72–89, April 2016.
