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

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License: CC BY 4.0
Serval ID
serval:BIB_CC054D05930B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran)
Journal
Earth Surface Dynamics
Author(s)
Normand Raphaël, Simpson Guy, Herman Frédéric, Biswas Rabiul Haque, Bahroudi Abbas, Schneider Bastian
ISSN
2196-632X
Publication state
Published
Issued date
26/03/2019
Peer-reviewed
Oui
Volume
7
Number
1
Pages
321-344
Language
english
Abstract
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.
Keywords
Earth-Surface Processes, Geophysics
Web of science
Open Access
Yes
Funding(s)
Swiss National Science Foundation / 200021_155904
Create date
19/08/2019 15:50
Last modification date
11/01/2023 7:14
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