Caractérisation Des Structures Géologiques Par Analyse Morphostructurale d’Image d’Ombrage (ASAR ENVISAT Et MNT SRTM) Et Géostatistique Du Sud De La Côte d’Ivoire

Abstract

This paper focuses on characterizing the structural lineaments of the South of Côte d’Ivoire by using the morphostructural analysis of shading images technique (ENVISAT/ASAR and SRTM/DTM) and the geostatistical method for a better understanding of the fractured environment. This study is carried out on the basis of techniques of backscattered radar signal and the geomorphological analysis. This technical implementation significantly improves the mapping of the fractures of the study area. The number of fractures is estimated at 778. Direction N100-110° fractures are the longest and most representative. The fracture spacing fits better into the power law. The geostatistical analysis shows that the global fracturing variogram is spatially well structured. The fracture density in cumulative lengths is therefore identified with a regionalized variable. The fracturing map that is obtained represents a basic document in the fields of hydrogeology. This paper can be used for prospecting and production drilling campaigns and can be used also in geotechnics and mining prospecting.