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<p>Northern Morocco, within the Betic-Rif Cordillera, lies in a geodynamically complex zone shaped by ongoing convergence between the African and Eurasian plates. This tectonic interaction has produced a heterogeneous crust whose geometry and evolution remain debated. Crustal models derived from receiver functions are inherently limited by station spacing and noise levels; integrating high-resolution aeromagnetic data allows better constraints on major structures and reduces uncertainties in sparsely sampled regions. In this study, we combine teleseismic receiver function analysis with aeromagnetic data to investigate the crustal architecture and major tectonic features of the Rif domain. Receiver functions from three-component recordings of 24 broadband seismic stations were modeled to estimate crustal thickness and elastic properties, while aeromagnetic data were analyzed to map subsurface magnetic sources and structural frameworks. Results reveal significant lateral variations in Moho depth, with crustal thickness increasing from eastern to western sectors (± 2–3&#xa0;km). Vp/Vs ratios vary between ~ 1.7 and 1.8 (± 0.05), reflecting spatially variable crustal composition and rheology. Aeromagnetic anomalies and lineaments highlight contrasting magnetic domains and major tectonic structures consistent with geological observations. These findings reveal a highly dynamic crust shaped by lithospheric deformation and mantle–crust interactions, providing critical constraints for seismotectonic interpretations and regional seismic hazard assessment.</p>

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Integrated seismic and aeromagnetic investigation of crustal structure and tectonic framework of the Rif region, Northern Morocco

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Mohamed EL Hilali,
  • Youssef Timoulali,
  • Mustapha Bouiflane,
  • Allal Labriki,
  • Abdelkarim Najim

摘要

Northern Morocco, within the Betic-Rif Cordillera, lies in a geodynamically complex zone shaped by ongoing convergence between the African and Eurasian plates. This tectonic interaction has produced a heterogeneous crust whose geometry and evolution remain debated. Crustal models derived from receiver functions are inherently limited by station spacing and noise levels; integrating high-resolution aeromagnetic data allows better constraints on major structures and reduces uncertainties in sparsely sampled regions. In this study, we combine teleseismic receiver function analysis with aeromagnetic data to investigate the crustal architecture and major tectonic features of the Rif domain. Receiver functions from three-component recordings of 24 broadband seismic stations were modeled to estimate crustal thickness and elastic properties, while aeromagnetic data were analyzed to map subsurface magnetic sources and structural frameworks. Results reveal significant lateral variations in Moho depth, with crustal thickness increasing from eastern to western sectors (± 2–3 km). Vp/Vs ratios vary between ~ 1.7 and 1.8 (± 0.05), reflecting spatially variable crustal composition and rheology. Aeromagnetic anomalies and lineaments highlight contrasting magnetic domains and major tectonic structures consistent with geological observations. These findings reveal a highly dynamic crust shaped by lithospheric deformation and mantle–crust interactions, providing critical constraints for seismotectonic interpretations and regional seismic hazard assessment.