Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran)

Détails

Ressource 1Télécharger: esurf-7-321-2019.pdf (13431.32 [Ko])
Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_CC054D05930B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran)
Périodique
Earth Surface Dynamics
Auteur⸱e⸱s
Normand Raphaël, Simpson Guy, Herman Frédéric, Biswas Rabiul Haque, Bahroudi Abbas, Schneider Bastian
ISSN
2196-632X
Statut éditorial
Publié
Date de publication
26/03/2019
Peer-reviewed
Oui
Volume
7
Numéro
1
Pages
321-344
Langue
anglais
Résumé
The western part of the Makran subduction zone (Iran) is currently experiencing active surface uplift, as attested by the presence of emerged marine terraces along the coast. To better understand the uplift recorded by these terraces, we investigated seven localities along the Iranian Makran and we performed radiocarbon, 230Th∕U and optically stimulated luminescence (OSL) dating of the layers of marine sediments deposited on top of the terraces. This enabled us to correlate the terraces regionally and to assign them to different Quaternary sea-level highstands. Our results show east–west variations in surface uplift rates mostly between 0.05 and 1.2 mm yr−1. We detected a region of anomalously high uplift rate, where two MIS 3 terraces are emerged, but we are uncertain how to interpret these results in a geologically coherent context. Although it is presently not clear whether the uplift of the terraces is linked to the occurrence of large megathrust earthquakes, our results highlight rapid surface uplift for a subduction zone context and heterogeneous accumulation of deformation in the overriding plate.
Mots-clé
Earth-Surface Processes, Geophysics
Web of science
Open Access
Oui
Financement(s)
Fonds national suisse / 200021_155904
Création de la notice
19/08/2019 16:50
Dernière modification de la notice
11/01/2023 8:14
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