The Western Moroccan Meseta contains mining sites in operation for several decades and others in development. The Rehamna Massif belonging to this, is the subject of this study. The present study reveals new results on the mineralization in this massif. It is based on the synergy of field investigation data and ASTER image analysis (L1T) covering this massif. Through spectral processing, namely the calculation of the band ratios, ACP and MNF, applied to the nine VNIR and SWIR bands of this image, it was possible to reveal the distribution of hydrothermal alteration minerals in the study area. The conjuncture of these data allowed us to select geological targets likely to be of potential mining interest in the massif.

At the Moroccan Western Meseta, the study of airborne magnetic data from the Rehamna massif, using the potential aeromagnetic methods, has allowed us to improve and describe the geometry of the geological structures of the Rehamna variscan granitoids and their subsurface components. These methods have proven to be an adequate geophysical technique to study the deep and subsurface structures of this area covered by a thick Mesozoic-Cenozoic sedimentary cover. The calculation of the reduced map to pole and upward continuation of the reduced residual magnetic field to the pole at 2 km to 30 km shows the close relationship between the positive anomalies and the deep magma bodies that outcrop locally in the tectonic contacts; thus, a strong correlation between the aeromagnetic lineaments and the regional crustal-scale faults-oriented N-S to NE-SW. The calculation of the Euler deconvolution of these lineaments, using the different structural indices, shows a depth of aeromagnetic lineaments about ten kilometers due to the presence of a very thick sedimentary layer. The final structural map reveals four groups of faults oriented, respectively NNW-SSE, N-S, NNE-SSW, NE-SW, and E-W.

The analysis of the magnetic signatures and gravity gradient values of the Rehamna Massif south of the Moroccan Western Meseta by using Geosoft Oasis Montaj 7.0.1 software, allowed us to detect several useful anomalies to be exploited and which are related to magmatic bodies and structural features within the study area. These data were analyzed by applying several techniques, including the horizontal gradient filters combined with the first vertical derivative. Subsurface structures; such as geological boundaries, faults, dykes and folds, were visualized as lineaments on geophysical maps, then results were compared with structural features provided by previous studies in the region. Thus, the Rehamna Massif structural map shows sets of linear features which may represent faults or boundaries of geological structures, which can be either faults or boundaries of geological structures, and they are mostly oriented in the directions: N-S, NNE-SSW, NE-SW, E-W with the predominance of the NNE-SSW to NE-SW directions. In addition, the super position of the minerals bearing beds or formations were distinguished from gravity and magnetic data processing results. Some of the recognized anomalies are related to the existence of precious metals which belong to the granitic bodies within the study area.