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Estructura sísmica de la corteza bajo la cordillera del Rif

The basic aim of the project is to characterize the crustal structure in the Northern part of Morocco, especially beneath the Rif Cordillera, based on the acquisition of new wide-angle seismic profiles and on the integration of the various seismic data sets now available. In this way we envisage to overcome one of the marked failures existing at present to constrain any evolutionary model of the complex interaction zone between the European and African plates: the lack of reliable results on the architecture of the crust in the southern flank. The proposal involves the recording of three profiles of wide-angle reflection/refraction seismics, through the internal and external units of the Rif Cordillera and their transition to most eastern domains and to the Atlas. In all these transects, whose length oscillate between 250 and 300 km, seismic stations will be installed with a density of one instrument per 750-1000 m, and 3 to 4 shots will be fired throughout each profile. The high amount and density of new data will allow building up models of internal distribution of seismic velocities that document the crustal structure and its lateral variations. This information can be regarded as a `missing link' among a series of recently acquired data sets in diverse projects.

In addition, this proposal has a clear added value: to benefit from synergies already established between research groups to maximise and improve the results from various studies. The RIFSIS design envisages also to integrate all the seismic information available coming from both present projects as SIMA (Active seismics in the Atlas), SIBERIA (passive seismics in South Spain-North Morocco) and TOPOIBERIA (multidisciplinary studies and networks covering the whole Peninsula), and previous projects (ESCI-Betics-Alboran, seismic refraction in Betics, etc.). For this purpose: a) the data analysis of the broadband seismic network deployed in the northern part of Morocco will be completed, and b) we plan to maintain this network operative during the first semester of 2010, beyond the conclusion of its impelling project, SIBERIA (October of 2009), to coexist with the deployment of an OBS network in Alboran during that period (project TOPO-MED). This will allow to profit from previous efforts and improve/complete the results of regional seismicity and seismotectonics, deep structure by studying conversion of P and S waves, mantle anisotropy and tomographic inversion from different types of waves and at different scales. In this later case, the constraint on the crustal structure from the seismic profiles will be of great importance, and will be integrated to approach the regional mantle tomography. The geodynamic implications of all new results will also be discussed.

Researchers
  • Josep Gallart Muset, ICTJA-CSIC, Barcelona, Spain, Project Leader
  • Francisco Manuel Alonso Chaves, Universidad de Huelva, Spain
  • Lahcen Assebry, Institut Scientifique, Université Mohammed V Agdal-Rabat, Morocco
  • Luciana Bonatto, ICTJA-CSIC, Barcelona, Spain
  • Jordi Diaz, ICTJA-CSIC, Barcelona, Spain
  • Bouchta El Fellah, Institut Scientifique, Université Mohammed V Agdal-Rabat, Morocco
  • Driss El Ouai Institut Scientifique, Université Mohammed V Agdal-Rabat, Morocco
  • Mimoun Harnafi, Institut Scientifique, Université Mohammed V Agdal-Rabat, Morocco
  • Omar Kettani, Institut Scientifique, Université Mohammed V Agdal-Rabat, Morocco
  • Miguel Orozco Fernández, Universidad de Granada, Spain
  • Martin Schimmel, ICTJA-CSIC, Barcelona, Spain
  • Mohammed Jamal E. Sebbani, Institut Scientifique, Université Mohammed V Agdal-Rabat, Morocco
  • Abdelfatah Tahiri, Institut Scientifique, Université Mohammed V Agdal-Rabat, Morocco
  • Antonio Villaseñor Hidalgo, ICTJA-CSIC, Barcelona, Spain
  • Alba Gil de la Iglesia, ICTJA-CSIC, Barcelona, Spain

PROJECT INFO

 
 
  • Funding

    Project Financed by PNIDI-CGL - CGL2009-09727