Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran)
<p>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 Makra...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-03-01
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| Series: | Earth Surface Dynamics |
| Online Access: | https://www.earth-surf-dynam.net/7/321/2019/esurf-7-321-2019.pdf |
| _version_ | 1818063648066633728 |
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| author | R. Normand G. Simpson F. Herman R. H. Biswas A. Bahroudi B. Schneider |
| author_facet | R. Normand G. Simpson F. Herman R. H. Biswas A. Bahroudi B. Schneider |
| author_sort | R. Normand |
| collection | DOAJ |
| description | <p>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, <span class="inline-formula"><sup>230</sup>Th∕U</span> 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<span class="inline-formula"><sup>−1</sup></span>. 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.</p> |
| first_indexed | 2024-12-10T14:23:26Z |
| format | Article |
| id | doaj.art-7aba33c0095e4a4dba385d5cf6eae136 |
| institution | Directory Open Access Journal |
| issn | 2196-6311 2196-632X |
| language | English |
| last_indexed | 2024-12-10T14:23:26Z |
| publishDate | 2019-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Earth Surface Dynamics |
| spelling | doaj.art-7aba33c0095e4a4dba385d5cf6eae1362022-12-22T01:45:08ZengCopernicus PublicationsEarth Surface Dynamics2196-63112196-632X2019-03-01732134410.5194/esurf-7-321-2019Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran)R. Normand0G. Simpson1F. Herman2R. H. Biswas3A. Bahroudi4B. Schneider5Department of Earth Sciences, University of Geneva, Rue des Maraîchers 13, 1205 Geneva, SwitzerlandDepartment of Earth Sciences, University of Geneva, Rue des Maraîchers 13, 1205 Geneva, SwitzerlandInstitute of Earth Surface Dynamics, Faculty of Geosciences and Environment, University of Lausanne, 1012 Lausanne, SwitzerlandInstitute of Earth Surface Dynamics, Faculty of Geosciences and Environment, University of Lausanne, 1012 Lausanne, SwitzerlandExploration Department, School of Mining Engineering, University of Tehran, Northern Kargar Avenue, P.O. Box 11365-4563, Teheran, IranSteinmann Institute of Geology, University of Bonn, Nussallee 8, 53115 Bonn, Germany<p>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, <span class="inline-formula"><sup>230</sup>Th∕U</span> 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<span class="inline-formula"><sup>−1</sup></span>. 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.</p>https://www.earth-surf-dynam.net/7/321/2019/esurf-7-321-2019.pdf |
| spellingShingle | R. Normand G. Simpson F. Herman R. H. Biswas A. Bahroudi B. Schneider Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran) Earth Surface Dynamics |
| title | Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran) |
| title_full | Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran) |
| title_fullStr | Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran) |
| title_full_unstemmed | Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran) |
| title_short | Dating and morpho-stratigraphy of uplifted marine terraces in the Makran subduction zone (Iran) |
| title_sort | dating and morpho stratigraphy of uplifted marine terraces in the makran subduction zone iran |
| url | https://www.earth-surf-dynam.net/7/321/2019/esurf-7-321-2019.pdf |
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