The western Durkan Complex (Makran Accretionary Prism, SE Iran): A Late Cretaceous tectonically disrupted seamounts chain and its role in controlling deformation style

Barbero, Edoardo; Pandolfi, Luca; Delavari, Morteza; Dolati, Asghar; Saccani, Emilio; Catanzariti, Rita; Luciani, Valeria; Chiari, Marco; Marroni, Michèle

doi:10.1016/j.gsf.2020.12.001

Cited by 17 publications

(14 citation statements)

References 102 publications

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“…Moreover, regarding the function of subduction zones that recycles continental‐crustal materials into the mantle, mounting evidence suggests previous overestimation of the amount of recycling (Bassett et al., 2010). Here, we show that seamount subduction induced significant oceanic‐material accretion at shallower‐crustal depths (<10 km; Figures 4b and 4c), a situation that has actually been recognized worldwide (e.g., Barbero et al., 2021; Buchs et al., 2009, 2011). Thus, to realistically estimate continental recycling at subduction zones, these shallower situations must be reevaluated, as other global cases have already emphasized lower‐crustal (10–30 km) underplating of subducting materials (Scholl, 2021).…”

Section: Discussionsupporting

confidence: 63%

Reconstructing Ocean‐Plate Stratigraphy (OPS) to Understand Accretionary Style and Mélange Fabric: Insights From the Bangong‐Nujiang Suture (Tibet, China)

Zeng

Zhang

Chen

et al. 2021

Geophysical Research Letters

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Accretionary wedges are tectonic settings overriding subduction zones and generally show broad structural diversity, which, in first order, is reflected in tectonic accretion or erosion (Clift & Vannucchi, 2004). Therein, the accreted materials can involve variable amounts of oceanic basement or trench-fill sediments, which occur as either coherent units or mélanges (Meneghini et al., 2009). Wedge diversity is further complicated by the fact that mélanges may result from either sedimentary, tectonic or diapiric mechanisms, or a combination thereof (Festa et al., 2012). The nature of the lower plate, including oceanic-basement topography and volume of sediments, exerts a fundamental control on the wedge diversity (Clift & Vannucchi, 2004).

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Section: Discussionsupporting

confidence: 63%

Reconstructing Ocean‐Plate Stratigraphy (OPS) to Understand Accretionary Style and Mélange Fabric: Insights From the Bangong‐Nujiang Suture (Tibet, China)

Zeng

Zhang

Chen

et al. 2021

Geophysical Research Letters

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“…Beneath the transition zone between continental collision and oceanic subduction, the cause of strong crustal attenuation to the west of

58{}^{\circ}E

seems to be different from that of the Makran arc volcanoes. The strong attenuation beneath the transition zone could be related to slab detachment beneath the Zagros (Omrani et al., 2008), crustal deformation and rock compositional changes (Al‐Lazki et al., 2014), or a potential mantle plume (Barbero et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

Crustal Lg Attenuation Beneath the Iranian Plateau: Implications for Cenozoic Magmatism Related to Slab Subduction, Slab Break‐Off, and Mantle Flow

et al. 2023

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Cenozoic magmatism is present across the Iranian Plateau but, despite playing an important role in the geodynamic evolution of the young plateau, remains poorly understood. In this study, the crustal thermal structure beneath the Iranian Plateau is investigated by high‐resolution Lg‐wave attenuation tomography using a newly compiled data set, which consists of records from three recent temporary seismic arrays (for a total of 197 stations) and previous regional networks. Strong Lg attenuation is mainly observed beneath the Zagros orogenic belt, Urumieh‐Dokhtar magmatic arc (UDMA), Makran magmatic arc, Lut magmatic zone, and Alborz reararc magmatic belt, which covers not only tectonic boundary belts but also the active internal zones of the Iranian Plateau. Combining deep seismological observations and geochemical data, the strong crustal attenuation characteristics beneath the northwestern and southeastern UDMA suggest that Miocene–Quaternary magmatism was activated by slab detachment‐induced upwelling after the cessation of oceanic subduction. Western Makran is characterized by strong Lg attenuation with a NE trend. The age of the Paleogene–Quaternary Makran volcanism decreases toward the NE and is likely related to the change in subduction dip. Diffuse magmatism and strong crustal attenuation are present in the northern Lut Block rather than the entire Lut–Afghan collision zone, which is likely associated with the accumulation of mantle magmas driven by the potential northward asthenospheric flow. In northern Iran, a strong attenuation anomaly spans the entire E‒W Alborz magma belt, suggesting that partial crustal melting and mantle thermal sources may exist in this region.

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“…The Bajgan-Durkan complex comprises Late Jurassic to Early Cretaceous and Paleocene meta-ophiolites and related pelagic meta-sediments that were affected by low-to mediumpressure/low-temperature metamorphism within a Late Cretaceous subduction system (Barbero, 2021;Pandolfi et al, 2021). Recent studies show that the Bajgan-Durkan complex consists of Early Cretaceous to Paleocene metapelites, carbonates and volcanic successions which appear to be remnants of oceanic seamounts (Barbero et al, 2021a;Barbero et al, 2021b;Pandolfi et al, 2021); there is no clear evidence for considering it as a continental ribbon.…”

Section: Bajgan-durkan Complexmentioning

confidence: 99%

Geochemical variability among stratiform chromitites and ultramafic rocks from Western Makran, South Iran

Moghadam

Arai

Khedr

et al. 2022

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The western Durkan Complex (Makran Accretionary Prism, SE Iran): A Late Cretaceous tectonically disrupted seamounts chain and its role in controlling deformation style

Cited by 17 publications

References 102 publications

Reconstructing Ocean‐Plate Stratigraphy (OPS) to Understand Accretionary Style and Mélange Fabric: Insights From the Bangong‐Nujiang Suture (Tibet, China)

Reconstructing Ocean‐Plate Stratigraphy (OPS) to Understand Accretionary Style and Mélange Fabric: Insights From the Bangong‐Nujiang Suture (Tibet, China)

Crustal Lg Attenuation Beneath the Iranian Plateau: Implications for Cenozoic Magmatism Related to Slab Subduction, Slab Break‐Off, and Mantle Flow

Geochemical variability among stratiform chromitites and ultramafic rocks from Western Makran, South Iran

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