10.5880/fidgeo.2020.020 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2025-03-03 urn:ogc:def:crs:EPSG:4326 Images and videos of analogue centrifuge models exploring marginal flexure during rifting in Afar, East Africa 2025-03-03 revision 2020-04-02 creation doi:10.5880/fidgeo.2020.020 Zwaan, Frank University of Florence, Florence, Italy author Corti, Giacomo CNR Italian National Research Council, Italy author Keir, Derek University of Southampton, Southampton, UK author Sani, Federico University of Florence, Florence, Italy author Tectonics Modelling Laboratory (IGG-CNR, Italy) IGG-CNR, Florence, Italy originator GFZ Data Services publisher This data set includes images and videos depicting the evolution of deformation and topography in 17 analogue experiments of passive margin development, to better understand the ongoing tec-tonics along the western margin of Afar, East Africa. The tectonic background that forms the basis for the experimental design is described in Zwaan et al. 2020a-d, and references therein. The ex-periments, in an enhanced gravity field in a large-capacity centrifuge, examined the influence of brittle layer thickness, strength contrast, syn-rift sedimentation and oblique extension on a brittle-viscous system with a strong and weak viscous domain. All experiments were performed at the Tectonic Modelling Laboratory of the Istituto di Geoscience e Georisorse - Consiglio Nazionale delle Ricerche (CNR-IGG) and of the Earth Sciences Department of the University of Florence (CNR/UF). The brittle layer (sand) thickness ranged between 6 and 20 mm, the underlying viscous layer, split in a competent and weak domain (both viscous mixtures), was always 10 mm thick. Asymmetric extension was achieved by removing a 1.5 mm thick spacer at the side of the model at every time step, allowing the analogue materials to spread when en-hanced gravity was applied during a centrifuge run. Differential stretching of the viscous material creates flexure and faulting in the overlying brittle layer. Total extension amounted to 10.5 mm over 7 intervals for Series 1 models that aimed at un-derstanding generic passive margin development in a generic orthogonal extension setting, where-as up to 16.5 mm of extension was applied for the additional Series 2 models aiming to reproduce the tectonic phases in Afar. In models involving sedimentation, sand was filled in at time steps 2, 4 and 6 (i.e. after 3, 6 and 9 mm of extension). Detailed descriptions of the experiments, monitoring techniques and tectonic interpretation of the model results are presented in Zwaan et al. (2020a). Complete Zwaan, Frank University of Bern, Bern, Switzerland Postdoc Researcher frank.zwaan@geo.unibe.ch, fzwaan@hotmail.com http://www.geo2.unibe.ch/personen/team_ifg_detail_e.php?PID=50995604 informtion pointOfContact Corti, Giacomo CNR Italian National Research Council, Italy giacomo.corti@cnr.it pointOfContact EPOS Analogue modelling results multi-scale laboratories Rifting Passive margin antiform flexure/buckle graben normal fault plateau rift valley EPOS WP16 Analogue Geologic Structure publication deformation > ductile flow deformation > folding deformation > fracturing geologic process rifting sedimentary process > deposition tectonic process > continental_breakup > rifting EPOS WP16 Analogue Process/Hazard publication depression tectonic and structural features EPOS WP16 Analogue Geologic Feature publication EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > CRUSTAL MOTION > CRUSTAL MOTION DIRECTION EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > FAULT MOVEMENT > FAULT MOVEMENT DIRECTION EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > PLATE BOUNDARIES EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > STRAIN EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > STRESS NASA/GCMD Earth Science Keywords publication graben tectonic setting > extended terrane setting > continental rift setting tectonic setting > plate margin setting > active continental margin setting tectonic setting > plate spreading center setting EPOS WP16 Analogue Main Setting publication CC BY 4.0 CC BY 4.0 10.1016/j.tecto.2020.228595 DOI IsSupplementTo 10.1016/j.jafrearsci.2019.103649 DOI Cites 10.1029/2019TC006043 DOI Cites 10.5880/fidgeo.2020.017 DOI Cites eng geoscientificInformation http://doi.org/10.5880/fidgeo.2020.020 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information