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<p>The Anti-Atlas fold and thrust belt is considered an important metallogenic province on the northern margin of the West African Craton (WAC). This structural domain is mainly controlled by structural features inherited from many phases of orogenesis. The present paper focuses on the Saghro massif which is a large Precambrian inlier, including the highest peak in the range, Jbel Mansour, reaching 2600&#xa0;m, along with many other inaccessible areas. This study fulfills an integrated magnetic interpretation aiming to characterize the underlying structures of the Saghro massif in the Eastern Anti-Atlas. The principal purpose consists in subsurface mapping of hidden faults and structures based on magnetic data interpretation in order to image the structural architecture of an inaccessible area (south-east of the Saghro inlier). We particularly focused on determining the local structures and tectonic units by applying many derivative filters to the magnetic data reduced to pole. We define the superposition of all magnetic lineaments obtained from various edge detection techniques. The results outline directions that are the same as the general tectonic structures of the area. NE–SW and E–W directions correspond mainly to Hercynian faults, while the NW–SE to ESE–WNW directions are related to the late Pan-African phase. The analysis of magnetic grids confirmed the geological knowledge about the study area. Thus, the base-cover boundary is well plotted. This boundary is highlighted through the change in signature and magnetic field strength on the map of the magnetic field reduced to the pole of the study area. The Neoproterozoic base is clearly marked by a heterogeneous expression of the magnetic field and very high intensities. However, the Paleozoic cover is distinguished by its homogeneous and low intensity response. The interpreted magnetic lineament maps identified new profound faults in this region, in addition to confirming other structural features already highlighted by previous geophysical investigations. Our synthetic structural map of magnetic lineaments serves as a framework for future mining exploration.</p>

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Structural Features South-East of the Saghro Inlier (Eastern Anti-Atlas, Morocco): Insights from Aeromagnetic Data

  • 期刊论文

  • 发表日期：

    2025年10月29日

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  • Zineb Aafir,
  • Lahcen Ousaid,
  • Mohamed Kasmi,
  • Youssef Hahou,
  • Soufiane Aafir,
  • Said Courba,
  • Assia Idrissi,
  • Hafsa Boufkri,
  • Ahmed Manar,
  • Aziza Lamchaimech

摘要

The Anti-Atlas fold and thrust belt is considered an important metallogenic province on the northern margin of the West African Craton (WAC). This structural domain is mainly controlled by structural features inherited from many phases of orogenesis. The present paper focuses on the Saghro massif which is a large Precambrian inlier, including the highest peak in the range, Jbel Mansour, reaching 2600 m, along with many other inaccessible areas. This study fulfills an integrated magnetic interpretation aiming to characterize the underlying structures of the Saghro massif in the Eastern Anti-Atlas. The principal purpose consists in subsurface mapping of hidden faults and structures based on magnetic data interpretation in order to image the structural architecture of an inaccessible area (south-east of the Saghro inlier). We particularly focused on determining the local structures and tectonic units by applying many derivative filters to the magnetic data reduced to pole. We define the superposition of all magnetic lineaments obtained from various edge detection techniques. The results outline directions that are the same as the general tectonic structures of the area. NE–SW and E–W directions correspond mainly to Hercynian faults, while the NW–SE to ESE–WNW directions are related to the late Pan-African phase. The analysis of magnetic grids confirmed the geological knowledge about the study area. Thus, the base-cover boundary is well plotted. This boundary is highlighted through the change in signature and magnetic field strength on the map of the magnetic field reduced to the pole of the study area. The Neoproterozoic base is clearly marked by a heterogeneous expression of the magnetic field and very high intensities. However, the Paleozoic cover is distinguished by its homogeneous and low intensity response. The interpreted magnetic lineament maps identified new profound faults in this region, in addition to confirming other structural features already highlighted by previous geophysical investigations. Our synthetic structural map of magnetic lineaments serves as a framework for future mining exploration.