Late Quaternary Paleoshorelines and Sedimentary Sequences in Chabahar Bay (Southeast of Iran)

Gharibreza, Mohammadreza; Motamed, A

doi:10.2112/05a-0020.1

Cited by 13 publications

(10 citation statements)

References 4 publications

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“…1a) (Bayer et al, 2006;Frohling and Szeliga, 2016;Khan et al, 2008;Masson et al, 2007;Penney et al, 2017;Peyret et al, 2009;Vernant et al, 2004;Walpersdorf et al, 2014). Although most of this convergence seems to be accommodated by reverse faults within the prism, margin-parallel normal faulting is predominant in the coastal region (Back and Morley, 2016;Dolati and Burg, 2012;Ghorashi, 1978;Harms et al, 1984;Hosseini-Barzi and Talbot, 2003;Little, 1972;Platt and Leggett, 1986;Samadian et al, 1994Samadian et al, , 1996Samadian et al, , 2004Snead, 1993). The seismic activity of the MSZ is low compared to other subduction zones around the globe, although most studies agree that the potential for tsunamigenic megathrust earthquakes exists (e.g., Heidarzadeh et al, 2008;Hoffmann et al, 2013a;Pararas-Carayannis, 2006;Penney et al, 2017;Shah-Hosseini et al, 2011;Smith et al, 2013).…”

Section: Geodynamics and Seismicity Of The Makran Subduction Zone (Msz)mentioning

confidence: 99%

“…Along the western Makran coast, the bedrock lithology is dominated by highly erodible Neogene to recent fine-grained marls, deposited in a slope environment, forming a wide flat coastal plain (Blanford, 1872;Burg et al, 2012;Falcon, 1947;Ghorashi, 1978;Harms et al, 1984;Harrison, 1941;McCall, 2002;Page et al, 1979;Snead, 1967;Stiffe, 1874). The coastal plain is locally interrupted and overlooked by prominent rocky headlands, 10 to 30 km in length, hosting emerged sequences of marine terraces.…”

Section: Geological and Geomorphological Settingmentioning

confidence: 99%

“…The climate is arid to semiarid and vegetation is sparse. Precipitation rates remain low (mean annual precipitation: ∼ 120 mm), which implies low erosion rates on sandstone rocks (Haghipour et al, 2012;Page et al, 1979), although fine-grained bedrock is strongly eroded during the yearly intense rainfall events (Falcon, 1947;Ghorashi, 1978;Harrison, 1941;Snead, 1967;Stiffe, 1874).…”

Section: Geological and Geomorphological Settingmentioning

confidence: 99%

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

et al. 2019

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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.

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Section: Geodynamics and Seismicity Of The Makran Subduction Zone (Msz)mentioning

confidence: 99%

Section: Geological and Geomorphological Settingmentioning

confidence: 99%

Section: Geological and Geomorphological Settingmentioning

confidence: 99%

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

et al. 2019

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“…4g, 6). Although we observe no reverse faulting in the coastal region, reverse faults are observed north of the studied region (and offshore, near the front of the accretionary prism) Ghorashi, 1978;Grando and McClay, 2007;Smith et al, 2012). Also observed to the north are numerous E-W striking, double-plunging anticlines and synclines (Fig.…”

Section: Tectonic Implicationsmentioning

confidence: 53%

Final Author comment

Normand¹

2019

Preprint

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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, 230 Th/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.Published by Copernicus Publications on behalf of the European Geosciences Union.

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“…The ebb current direction is north-west at rates between 0.6 and 0.4 m s −1 . In contrast, the mean velocity of flood currents was recorded 0.65 m s −1 and speeds up at Zohreh River mouth to 0.8 m s −1 towards north-east (Gharibreza & Motamed, 2006). As a result, the coastline direction of Hendijan Delta has shaped by flood current pattern.…”

Section: Introductionmentioning

confidence: 84%

Late Holocene evolution of the Hendijan Delta (north of the Persian Gulf)

Gharibreza

2017

Geology, Ecology, and Landscapes

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Hendijan Delta is an active sedimentary environment at the north of the Persian Gulf which represents the late Holocene climate changes and tectonic movements. Achieve to evolution trend of Hendijan Delta since the late Holocene was aim of the present research. This purpose was supported by 14 C dating method and surveying of paleoshorelines using Differential Geographical Positioning System. Eight paleoshoreline were found which the oldest one was dated 2555 ± 114 BP, at 3-m elevation and 9492 m far from present coastline. Maximum prograding rate of delta was happened with the mean rate 7.29 m y −1 between the first and the sixth paleo shorelines. Nevertheless, shoreline regression was relatively constant at a rate of 0.6 m y −1 since 693 ± 17 BP. Resultant data raveled that Hendijan Delta has been uplifted at the mean rate of 1.86 ± 0.77 mm y −1 which agrees with 2-mm y −1 uplifting rate of Iranian continental margin. An increase in the shell content in sediments of paleoshorelines highlighted the climate changes to Sub-Atlantic (Roman Warm Period) condition, especially since 693 ± 14 BP. Natural trend associated with human evidences which settlements were established behind of the first paleoshoreline during the Sassanid Empire (224-651 CE). INWASCON

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Late Quaternary Paleoshorelines and Sedimentary Sequences in Chabahar Bay (Southeast of Iran)

Cited by 13 publications

References 4 publications

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

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

Final Author comment

Late Holocene evolution of the Hendijan Delta (north of the Persian Gulf)

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