Print Email Facebook Twitter Anticline growth by shortening during crustal exhumation of the Moroccan Atlantic margin Title Anticline growth by shortening during crustal exhumation of the Moroccan Atlantic margin Author Fernández-Blanco, D. (Consejo Superior de Investigaciones Científicas) Gouiza, M. (University of Leeds) Charton, R.J.G. (TU Delft Applied Geology; NARG (North Africa Research Group)) Kluge, C. (TU Delft Reservoir Engineering) Klaver, J. (Rheinisch-Westfälische Technische Hochschule) Brautigam, K. (Vrije Universiteit Amsterdam) Bertotti, G. (TU Delft Applied Geology; NARG (North Africa Research Group)) Date 2020 Abstract It is unclear how the crustal-scale erosional exhumation of continental domains of the Moroccan Atlantic margin and the excessive subsidence of its rifted domains affected the Late Jurassic-Early Cretaceous post-rift evolution of the margin. To constrain the km-scale exhumation, we study the structural evolution of the Jbel Amsittene. This anticline is located on the coastal plain of the Moroccan Atlantic margin, and is classically considered to have been developed initially in the Late Cretaceous by halokinesis, and by contraction during the Neogene. Contrarily, our structural analysis indicates that the anticline is a fault-propagation fold verging north with Triassic salts at its core and that it formed by shortening shortly after continental breakup of the Central Atlantic. The anticline grew by NNW-SSE to NNE-SSW contraction, as shown by syn-tectonic wedges, regional kinematic indicators and synsedimentary structures in Upper Jurassic to Lower Cretaceous rocks. It grew further and tightened during the Cenozoic, presumably in relation to the Atlas/Alpine contraction. Thus, our data and interpretation suggest that “tectonic-drives-salt” in the anticline early growth, which is coeval with the growth of other anticlines along the Moroccan Atlantic margin and widespread km-scale exhumation farther onshore. Anticline growth due to shortening argues for intraplate far-field stresses potentially linked to the geodynamic evolution of the African, American and European plates. To reference this document use: http://resolver.tudelft.nl/uuid:3a0f5e77-c5ba-42f4-8f84-6a42356299f5 DOI https://doi.org/10.1016/j.jsg.2020.104125 ISSN 0191-8141 Source Journal of Structural Geology, 140, 1-14 Part of collection Institutional Repository Document type journal article Rights © 2020 D. Fernández-Blanco, M. Gouiza, R.J.G. Charton, C. Kluge, J. Klaver, K. Brautigam, G. Bertotti Files PDF 1_s2.0_S0191814120301140_main.pdf 20.4 MB Close viewer /islandora/object/uuid:3a0f5e77-c5ba-42f4-8f84-6a42356299f5/datastream/OBJ/view