Distribution of the Late Jurassic Dykes of the Central High Atlas and Tectonic Implications
Summary Inventory of dyke swarms in the Central High Atlas reveals at least 303 dykes, spanning 646 visible km in outcrop. Their predominantly unidirectional ENE-WSW strike may indicate a NNW-SSE extensional event from Mid-Jurassic to Early Cretaceous times, potentially linked to large intrusions in the Central High Atlas. These intrusions are thought to have occupied the crustal levels of the basin, as suggested by tomographic studies. The NNW-SSE direction of extension contradicts compressional tectonics and raises questions about the emplacement of intrusions along releasing stepovers and bends, as proposed in previous models. Therefore, an extensional event appears to be a more plausible explanation for the post-Middle Jurassic magmatism.
Authors
- Moulay Ahmed Boumehdi (ORCID: https://orcid.org/0000-0001-5084-1551)
- Andrea Marzoli (ORCID: https://orcid.org/0000-0003-0093-2759)
- Nasrrddine Youbi (ORCID: https://orcid.org/0000-0003-3466-2400)
- Hassan Ibouh (ORCID: https://orcid.org/0000-0002-3287-9537)
- Fida Medina (ORCID: https://orcid.org/0000-0002-4009-8108)
- Hervé Bertrand (ORCID: https://orcid.org/0000-0001-7196-7612)
Institutions
- Université Claude Bernard Lyon 1 (FR)
- École Normale Supérieure de Lyon (FR)
- Cadi Ayyad University (MA)
- Centre National de la Recherche Scientifique (FR)
- University of Padua (IT)
- University of Lisbon (PT)
- National Research Tomsk State University (RU)
- Moroccan Foundation for Advanced Science, Innovation and Research (MA)
- Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement (FR)
Publication Details
- Published
- 2025-01-01
- DOI
- https://doi.org/10.3997/2214-4609.2025639028
- Primary Topic
- Geological and Geophysical Studies Worldwide
- Type
- article
- Field-Weighted Citation Impact
- 0.00