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<p>The eastern sector of the Central High Atlas in Morocco has experienced a complex intracontinental orogenic evolution. Despite these advances, the eastern sector of the Central High Atlas remains comparatively poorly documented by aeromagnetic studies. Although the region is crucial to the tectonic history of the Atlas system, the geometry and movement of its deep structures remain poorly understood. In this study, we present a new understanding of the subsurface architecture and tectonic evolution by integrating high-resolution aeromagnetic data with geological and structural information. We applied advanced magnetic processing techniques to investigate subsurface structures. Reduction to the Pole (RTP) relocated anomalies above their sources for better geological correlation, the Tilt Derivative (TDR) to delineated structural boundaries and estimated depths, and the Horizontal Gradient Magnitude (HGM) highlighted lateral magnetic contrasts. Additionally, the analytic signal amplitude (AS) was computed to locate the edges of magnetic bodies and enhance the identification of buried faults, independent of magnetization direction. The Centre for Exploration Targeting (CET) method further enhanced the automatic extraction of major lineaments and provided additional insights into regional tectonic trends. Our results reveal a prominent network of NE-SW to NNE-SSW and NW-SE-trending thrust and reverse faults. Positive magnetic anomalies correspond to uplifted Paleozoic-Triassic basement blocks, while fracture patterns concentrate along hinge zones and fold limbs. The structural and magnetic evidence indicates a transpressional regime with combined compressive and dextral strike-slip kinematics. This integrated magneto-structural model provides a comprehensive view of the subsurface framework, offering a strong basis for future tectonic and resource studies.</p>

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Aeromagnetic mapping of faults and lineaments in the eastern Central High Atlas (Morocco): implications for regional tectonic evolution

  • 期刊论文

  • 发表日期：

    2026年4月2日

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  • Fadoua Saadaoui,
  • Lahcen Ousaid,
  • Brahim Oujane,
  • Souad Assoussi,
  • Zineb Aafir,
  • Hanane Ait Haddou,
  • Amnay Mezzan,
  • Slimane Sassioui,
  • Youssef Hahou

摘要

The eastern sector of the Central High Atlas in Morocco has experienced a complex intracontinental orogenic evolution. Despite these advances, the eastern sector of the Central High Atlas remains comparatively poorly documented by aeromagnetic studies. Although the region is crucial to the tectonic history of the Atlas system, the geometry and movement of its deep structures remain poorly understood. In this study, we present a new understanding of the subsurface architecture and tectonic evolution by integrating high-resolution aeromagnetic data with geological and structural information. We applied advanced magnetic processing techniques to investigate subsurface structures. Reduction to the Pole (RTP) relocated anomalies above their sources for better geological correlation, the Tilt Derivative (TDR) to delineated structural boundaries and estimated depths, and the Horizontal Gradient Magnitude (HGM) highlighted lateral magnetic contrasts. Additionally, the analytic signal amplitude (AS) was computed to locate the edges of magnetic bodies and enhance the identification of buried faults, independent of magnetization direction. The Centre for Exploration Targeting (CET) method further enhanced the automatic extraction of major lineaments and provided additional insights into regional tectonic trends. Our results reveal a prominent network of NE-SW to NNE-SSW and NW-SE-trending thrust and reverse faults. Positive magnetic anomalies correspond to uplifted Paleozoic-Triassic basement blocks, while fracture patterns concentrate along hinge zones and fold limbs. The structural and magnetic evidence indicates a transpressional regime with combined compressive and dextral strike-slip kinematics. This integrated magneto-structural model provides a comprehensive view of the subsurface framework, offering a strong basis for future tectonic and resource studies.