Abstract
The region of M'rara, located in the northeast Algerian Sahara basin, is severely afflicted by several natural perils such as the collapses and fissures around the water borehole situated in the center of the small town of M'rara. The present study was conducted in order to investigate the ground structures under eighteen (18) sites located near the above mentioned water borehole using the magnetotelluric (MT) method to collect the required data. For this reason, the three-dimensional (3-D) inversion method was done using the ModEM package to obtain a realistic 3-D resistivity model of the structures. The preferred model obtained from the 3-D inversion is sufficient to identify the M'rara basin; where reveal the folded resistive structure with an anticline form below the Senonian level and the significant fractures of axial and transverse types that extend in the hinge zone of this structure. As a result, the fissures and collapses at the ground surface may be attributed to a karstic process in the limestone layer in contact with water.
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Foudili, D., Bouzid, A., Berguig, M.C., Bougchiche, S.S., Abtout, A., Guemache, M.A. (2022). Characterizing the Subsurface Structure Using 3-D Magnetotelluric Inversion: A Case Study of M'rara Basin, Algerian Sahara. In: Meghraoui, M., et al. Advances in Geophysics, Tectonics and Petroleum Geosciences. CAJG 2019. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-030-73026-0_74
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DOI: https://doi.org/10.1007/978-3-030-73026-0_74
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