Apport de la Cartographie Lithostructurale par Imagerie Satellitaire Landsat 7 à la Connaissance des Aquifères du Socle Précambrien de la Région de Bondoukou (Nord-Est de la Côte D'ivoire)/[ Contribution of the Lithostructural Mapping By Landsat 7 Imagery To Study the Precambrian Basement Aquifers in Bondoukou Region (Northeast Coast Ivory) ]

This study aimed at a better knowledge of aquifers of fractures of Bondoukou region by making a map of geological formations and structures from satellite Landsat 7 imagery. The techniques of images merging allowed to identify and map geological formations those constitute paleoproterozoic field of Bondoukou region. The use of spatiodirectionnel filtering methods of Sobel and gradient has led to develop detailed map of lineaments. This map includes about 5,000 fractures. The study of fracturing intensity raises the character much fractured of Bondoukou region notably in the north and south parts. The contact area between the prophyroid granodiorite and the volcano-sedimentary domain with strong structural tendency was also highlighted. The analysis of fracture networks reveals that the distribution of the lengths of fractures follows the power law. This law indicates that the fracture networks of Bondoukou region would have reached its optimal stage. The modelling all azimuths underlines a probability of more than 62% to meet a fracture within one kilometer of distance.