Joint inversion of receiver functions and surface wave dispersion velocities to investigate the crustal structure of north of Morocco: case of Rif domain

Timoulali, Youssef; Hilali, Mohamed El; Hosny, Ahmed; Moudnib, Lahcen El; Bouiflane, Mustapha; Chourak, Mimoun; Badrane, Said

doi:10.1007/s42990-022-00084-x

Cited by 2 publications

(3 citation statements)

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“…The scattered distribution of earthquakes in the West Alboran region is likely due to the complex interplay of geological and geophysical factors, including faulting, rock strength, and fluid migration. The geophysical data, including gravity, elevation, heat flow and seismic data can provide information about the Moho discontinuity in the Rif region of Morocco [Mancilla and Diaz, 2015;Timoulali et al, 2022]. The results suggest that the Moho is deepest, at a maximum depth of 36 km, under the Rif Mountains, and gradually decreases in depth to a minimum of 30 km toward the coast [Fullea et al, 2007;Torné et al, 2000;De Lis Mancilla and Diaz, 2015;Timoulali et al, 2022].…”

Section: Geological Settingmentioning

confidence: 99%

“…Moreover, the analysis of seismic data suggest that the Rif Mountains have a relatively thick crust, while the shallower Moho near the coast may reflect different geological processes and a different crustal structure Timoulali et al, 2022].…”

Section: Geological Settingmentioning

confidence: 99%

“…Such studies have been conducted to investigate the local crustal structure and better understand the geological and tectonic processes that have shaped the region [Gil et al, 2014;Mancilla and Diaz, 2015;Timoulali et al, 2014aTimoulali et al, , 2022. These studies use various geophysical techniques, such as seismic reflection and refraction, seismic/electrical tomography, magnetic surveys, and stations measurements to map the subsurface structure as well as the basins geometry [for Deep Seismic Sounding in the Alboran Sea 1974Sea , 1978Gurrria and Mezcua, 2000;Timoulali et al, 2014;El Fellah et al, 2019;EL Hilali et al, 2021;Taj et al, 2024].…”

Section: Introductionmentioning

confidence: 99%

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Crustal Attenuation Tomographic Image of Northern Morocco: Indication of High Tectonic Activities

Najim,

El Hilali,

Timoulali

et al. 2024

Annals of Geophysics

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Northern Morocco is known by its complex tectonic activity and has been the subject of various geophysical and geodynamic studies aimed to understand the physical properties and composition of the Earth’s crust and upper mantle. The waveforms of earthquakes recorded by the Topo – Iberia – Picasso seismic networks from 2008 to 2012 are analyzed to determine the decay properties of the coda wave and map the attenuation and absorption properties of the crust in this region. The coda quality factor Qc was estimated in five non‑overlapping frequency windows, ranging from 1.5 to 24 Hz, using recordings of local earthquakes. The measurements of Qc were then used to create maps of the absorption quality factor (Qi) using a linearized approximation. These maps were compared with the tectonic settings of the region to gain further insight into the crustal properties. Lateral and vertical variations of the coda quality factor (Qc) were investigated by creating a three‑dimensional tomographic image of the region. The results showed strong lateral variations of absorption in the northern part of Morocco, indicating high tectonic activity. Areas with high tectonic activity and high absorption were characterized by low values of Qc, while areas with low tectonic activity and low absorption had high values of Qc. The areas with thick cover sedimentary materials and shallow geothermal activity showed low‑frequency absorption. When compared to previous studies in northern Morocco, the study provides new information about the three‑dimensional attenuation model of the Earth’s crust.

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