Details of the abstract
| Title of paper | Magnetotelluric imaging of the Mitidja Basin structure, North of Algeria |
| List of authors | Kerbadj, N., Abderrezak, B., Kasdi, A-S., |
| Affiliation(s) | Université des sciences et de la technologie Houari Boumediene (USTHB)., Centre de Recherche Astronomie, Astrophysique et géophysique (CRAAG)., Université des sciences et de la technologie Houari Boumediene (USTHB) |
| Summary | The Mitidja basin is located in central northern Algeria, thus it is an active seismic zone. Studies have shown destructive earthquakes along the southern and northern sides of the area. It is associated with Quaternary compressive deformation revealed by thrust focal mechanisms (Maouche et al. 2011; Meghraoui 1991). Due to a lack of deep geophysical data, evidences about the lithospheric structures related to the formation of the Mitidja basin are limited. Magnetotelluric data from 10 stations on an 11 km N-S profile were acquired and inverted to derive an electrical resistivity model. Phase tensor analysis indicates a 2D resistivity structure with presence of 3D local features. The 2D inversion model illustrates electrically conductive basin with depth of ~ 3.5 km. The lack of seismic profiles and deep wells throughout the basin makes it impossible to know its depth, exact development time, geometry and dip of surrounding faults. Only modeling of recent gravity data highlights the direction of deep and steep north-dipping NE-SW tectonic contact at the northern basin boundary (Hamai 2011). The subject of this work is to image the underlying geoelectric structures beneath Mitidja basin |
| Session Keyword | 2.0 Theory, Modelling and Inversion |
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