Abstract
Our investigation relates to the interpretation of the magnetic data of Jbel Saghro, by aeromagnetic processing using Geosoft and ArcGis software. The data were obtained from digitizing the preexisting maps. From the magnetic field anomaly maps, different anomalies were identified with differences in intensities, sizes, and shapes and in being isolated or interfered. The directions are in general ENE-WSW, NNW-SSE, W-E, and NW-SE which are in good agreement with the general tectonic structure of the region. In order to correspond the anomalies to their natural sources and their geometrical configuration, it was necessary to calculate the residual polar. This avoids the presence of two lobes for the same source, what makes it possible to delimit the geological sources laterally. Thus, the attribution of each magnetic anomaly to its geological source becomes possible. Indeed, generally magnetic anomaly of strong intensities and big wavelengths is associated to very magnetized structures related to the Precambrian basement, and the negative a.m. is connected to structures of weak magnetization located in general in the cover. The application of the tilt angle filter allowed the localization of the outcrops of the inliers and new geophysical lineaments. On the other hand, the local maxima of the horizontal gradient made it possible to reveal the large structural features concerning the main tectonic events of the area.
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Acknowledgements
The authors thank the team Research of Geology of the Mining and Energetics Resources, Faculty of Science and Technology Settat, as well as the Ministry of the Energy, Mine, Water and Environment of Morocco in the name of MANAR Ahmed Head of division of applied geology for his technical support to succeed this work. The authors thank reviewers for their helpful comments and recommendations. The first author would like to thank the National Center for Scientific Technical Research (CNRST) Morocco, for granting his PhD Thesis (Ref. 20UHP2015).
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Miftah, A., El Azzab, D., Attou, A. et al. Contribution of the geomagnetism to the region of the massif Jbel Saghro geology, Eastern Anti-Atlas, Morocco. Arab J Geosci 10, 460 (2017). https://doi.org/10.1007/s12517-017-3251-2
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DOI: https://doi.org/10.1007/s12517-017-3251-2