The Dougbafla gold deposit is located in the West-Central part of Côte d'Ivoire at about 240 km from Abidjan, on the Birimian greenstone belt of Fettèkro (West African craton). The lithologies of this deposit can be divided into three lithotectonic units which correspond to volcanic, sedimentary, and plutonic assemblages metamorphosed in the shale facies. Hydrothermalism, on the one hand, caused a pervasive alteration of the primary paragenesis marked by sericitic, silica, and carbonate alteration. On the other hand, it causes a vein alteration materialized by quartz veins. These hydrothermal alterations induced two types of gold mineralization in the Dougbafla deposit. These are: (i) disseminated gold and sulphide mineralization in the granophyre associated with sericite, silica and dolomite alteration in which no quartz vein has been reported; this type however is controlled by the intrusion of granophyre and (ii) a quartz vein mineralization controlled by deformation.Keywords: Dougbafla, Birimian, Hydrothermalism, sericitic, silica RésuméLe gisement aurifère de Dougbafla est situé à 240 km d'Abidjan au Centre-Ouest de la Côte d'Ivoire sur la ceinture de roches vertes birimiennes de Fettèkro (craton ouest Africain). Les lithologies de ce gisement peuvent être subdivisées en trois unités lithotectoniques correspondant à des assemblages volcaniques, sédimentaires et plutoniques métamorphisées dans European Scientific Journal October 2017 edition Vol.13, No.30 ISSN: 1857 -7881 (Print) e -ISSN 1857 109 le faciès des schistes verts. L'hydrothermalisme a provoqué d'une part, une altération pervasive de la paragenèse primaire des marquée par la séricitisation, la silicification et la carbonisation et d'autre part par une altération filonienne matérialisée par des veines de quartz. Ces altérations hydrothermales ont induit deux types de minéralisation aurifère dans le gisement de Dougbafla. Il s'agit : (i) d'une minéralisation disséminée à or et sulfures dans le granophyre altéré en séricite, en silice et en dolomite dans lequel aucun filon de quartz n'a été signalé; ce type est contrôlé par l'intrusion de granophyre et (ii) d'une minéralisation filonienne liée à des veines de quartz, contrôlée par la déformation.

The mining research license of Oume (PR105) is located in the Centerwest forestry of Côte d’Ivoire on Fettekro greenstone belt. This furrow belongs to the Proterozoic Birimian series of West Africa. This concession which is our study area, is sheltered by the Bonikro gold deposit, which was discovered by sampling the geochemical gold soil anomaly. All around the latter within a radius of about 15 km, ten prospects or targets were highlighted by the method of soil geochemistry. These targets or potential anomalies are currently undergoing intensive drilling to identify potential resources that could feed into Bonikro mine processing unit. It is in this perspective that the aim of this work is to locate new targets likely to contain gold indices from the use of synthetic opening radar satellite imagery. The fracturing map was obtained by applying directional filters from Sobel on the radar images (N-S, E-W, NESW and NW-SE) and Yesou gradient filter. The enhanced lineaments were extracted manually. The report of the lineament direction on the specific tools called “Rosace” showed five (5) preferential direction classes [N00 - N10], [N20 - N30], [N40 - N80], [N90 - N100] and [N120 - N140]. The analysis of the relationship between the lineaments map and geochemical signature map of the study area shows that the area is intensely fractured and describes an anomaly that overlap with coarsely elongated gold content along the Birimian formations direction. The study permitted to identify four (4) potential targets within Oume license.