Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic margin
Salt tectonics play a critical role on passive margins evolution controlling aspects like structural style, subsidence patterns and thermal history, amongst others. The salt-bearing Atlantic passive margin of Morocco hosts one of the oldest stratigraphic records documenting the opening history of th...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/184426 |
| Acceso en línea: | https://hdl.handle.net/2445/184426 |
| Access Level: | acceso abierto |
| Palabra clave: | Tectònica salina Marges continentals Marroc Atlàntic, Oceà Tectonique du sel Continental margins Morocco Atlantic Ocean |
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Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic marginUranga Moran, Rodolfo MartínFerrer García, J. Oriol (José Oriol)Zamora, GonzaloMuñoz, J. A.Rowan, Mark G.Tectònica salinaMarges continentalsMarrocAtlàntic, OceàTectonique du selContinental marginsMoroccoAtlantic OceanSalt tectonics play a critical role on passive margins evolution controlling aspects like structural style, subsidence patterns and thermal history, amongst others. The salt-bearing Atlantic passive margin of Morocco hosts one of the oldest stratigraphic records documenting the opening history of the Central Atlantic. However, the available seismic data is scarce and some offshore basins are still poorly studied, particularly in southern Morocco. Through the interpretation of an unpublished 2D/3D seismic dataset from the offshore Tarfaya Basin (SW Morocco), this study aims to highlight the key events that conditioned the evolution of this salt-bearing basin. From proximal to distal regions, the structural style of the basin is characterized by expulsion rollovers and saltcored anticlines delimited by primary welded surfaces, evolving to buried salt sheets surrounded by thick minibasins and finally, diapirs actively deforming the modern seabed. From Late Triassic to Early Jurassic times, salt was deposited with a basinward thickening wedge-shaped geometry on a narrow trough developed over thinned continental crust. During the Jurassic, sedimentation and associated salt withdrawal triggered early salt deformation. Gravity gliding is a common process in salt-bearing passive margins that requires an originally continuous autochthonous salt layer with a minimum slope angle and longitude to thickness ratio of the overburden. However, in the Tarfaya Basin, the narrow geometry of the salt-bearing depocenter hampered this process. Early salt tectonics was probably triggered by slope progradation during the Early Jurassic. During the Early Cretaceous, the progradation of the Tan-Tan Delta promoted a continued basinward expulsion of salt, the development of a local salt-detached gravitational system and the proximal extrusion of salt sheets. Finally, from Late Cretaceous to the Present-day, shortening related to the convergence between Africa and Eurasia resulted in thick-skin inversion and the rejuvenation of precursor salt structures.Elsevier B.V.2022202420222022info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion44 p.application/pdfhttps://hdl.handle.net/2445/184426Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.marpetgeo.2021.105521Marine and Petroleum Geology, 2022, vol. 138, num. 105521https://doi.org/10.1016/j.marpetgeo.2021.105521cc-by-nc-nd (c) Elsevier B.V., 2022https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1844262026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic margin |
| title |
Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic margin |
| spellingShingle |
Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic margin Uranga Moran, Rodolfo Martín Tectònica salina Marges continentals Marroc Atlàntic, Oceà Tectonique du sel Continental margins Morocco Atlantic Ocean |
| title_short |
Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic margin |
| title_full |
Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic margin |
| title_fullStr |
Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic margin |
| title_full_unstemmed |
Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic margin |
| title_sort |
Salt tectonics of the offshore Tarfaya Basin, Moroccan Atlantic margin |
| dc.creator.none.fl_str_mv |
Uranga Moran, Rodolfo Martín Ferrer García, J. Oriol (José Oriol) Zamora, Gonzalo Muñoz, J. A. Rowan, Mark G. |
| author |
Uranga Moran, Rodolfo Martín |
| author_facet |
Uranga Moran, Rodolfo Martín Ferrer García, J. Oriol (José Oriol) Zamora, Gonzalo Muñoz, J. A. Rowan, Mark G. |
| author_role |
author |
| author2 |
Ferrer García, J. Oriol (José Oriol) Zamora, Gonzalo Muñoz, J. A. Rowan, Mark G. |
| author2_role |
author author author author |
| dc.subject.none.fl_str_mv |
Tectònica salina Marges continentals Marroc Atlàntic, Oceà Tectonique du sel Continental margins Morocco Atlantic Ocean |
| topic |
Tectònica salina Marges continentals Marroc Atlàntic, Oceà Tectonique du sel Continental margins Morocco Atlantic Ocean |
| description |
Salt tectonics play a critical role on passive margins evolution controlling aspects like structural style, subsidence patterns and thermal history, amongst others. The salt-bearing Atlantic passive margin of Morocco hosts one of the oldest stratigraphic records documenting the opening history of the Central Atlantic. However, the available seismic data is scarce and some offshore basins are still poorly studied, particularly in southern Morocco. Through the interpretation of an unpublished 2D/3D seismic dataset from the offshore Tarfaya Basin (SW Morocco), this study aims to highlight the key events that conditioned the evolution of this salt-bearing basin. From proximal to distal regions, the structural style of the basin is characterized by expulsion rollovers and saltcored anticlines delimited by primary welded surfaces, evolving to buried salt sheets surrounded by thick minibasins and finally, diapirs actively deforming the modern seabed. From Late Triassic to Early Jurassic times, salt was deposited with a basinward thickening wedge-shaped geometry on a narrow trough developed over thinned continental crust. During the Jurassic, sedimentation and associated salt withdrawal triggered early salt deformation. Gravity gliding is a common process in salt-bearing passive margins that requires an originally continuous autochthonous salt layer with a minimum slope angle and longitude to thickness ratio of the overburden. However, in the Tarfaya Basin, the narrow geometry of the salt-bearing depocenter hampered this process. Early salt tectonics was probably triggered by slope progradation during the Early Jurassic. During the Early Cretaceous, the progradation of the Tan-Tan Delta promoted a continued basinward expulsion of salt, the development of a local salt-detached gravitational system and the proximal extrusion of salt sheets. Finally, from Late Cretaceous to the Present-day, shortening related to the convergence between Africa and Eurasia resulted in thick-skin inversion and the rejuvenation of precursor salt structures. |
| publishDate |
2022 |
| dc.date.none.fl_str_mv |
2022 2022 2022 2024 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion |
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article |
| status_str |
acceptedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/184426 |
| url |
https://hdl.handle.net/2445/184426 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Versió postprint del document publicat a: https://doi.org/10.1016/j.marpetgeo.2021.105521 Marine and Petroleum Geology, 2022, vol. 138, num. 105521 https://doi.org/10.1016/j.marpetgeo.2021.105521 |
| dc.rights.none.fl_str_mv |
cc-by-nc-nd (c) Elsevier B.V., 2022 https://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
cc-by-nc-nd (c) Elsevier B.V., 2022 https://creativecommons.org/licenses/by-nc-nd/4.0/ |
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openAccess |
| dc.format.none.fl_str_mv |
44 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Elsevier B.V. |
| publisher.none.fl_str_mv |
Elsevier B.V. |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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