Early Carboniferous (∼357 Ma) crust beneath northern Arabia: Tales from Tell Thannoun (southern Syria)

Stern, Robert J.; Ren, Minghua; Ali, Kamal A.; Förster, H.-J.; Safarjalani, Abdulrahman; Nasir, Sobhi; Whitehouse, Martin J.; Leybourne, Matthew I.; Romer, Rolf L.

doi:10.1016/j.epsl.2014.02.043

Cited by 25 publications

(9 citation statements)

References 44 publications

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“…Interestingly, after first findings of Kohn et al (1992), increasing lines of evidence converge to show the existence of Late Paleozoic geological events (from 420 Ma to 310 Ma) not only in Central Iran (Bagheri and Stampfli, 2008;Zanchi et al, 2009a and b;Buchs et al, 2013;Moghadam et al, 2015) but also in the northern part of the Arabian plate Tavakoli-Shirazi et al, 2013;Stern et al, 2014) to which SSMZ was likely related.…”

Section: Accepted Manuscriptmentioning

confidence: 93%

Panafrican basement and Mesozoic gabbro in the Zagros orogenic belt in the Dorud–Azna region (NW Iran): Laser-ablation ICP–MS zircon ages and geochemistry

et al. 2015

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Section: Accepted Manuscriptmentioning

confidence: 93%

Panafrican basement and Mesozoic gabbro in the Zagros orogenic belt in the Dorud–Azna region (NW Iran): Laser-ablation ICP–MS zircon ages and geochemistry

et al. 2015

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“…A so-called "Hercynian unconformity" exists everywhere in the Arabian plate (Frizon de Lamotte et al 2013 and references therein). This deformation and the associated "thermal event" are probably independent from the "Variscan" orogeny in Europe and are rather related to anorogenic magmatic events within the Arabian plate and NW Iran (Frizon de Lamotte et al 2013;TavakoliShirazi et al 2013;Stern et al 2014;Moghadam et al 2015). Consequently, we suggest that mafic magmatism postdates the rising evidence for "Variscan" orogenic processes in the SSZ and Arabian plate.…”

Section: Discussionmentioning

confidence: 59%

“…1) and are locally asso ciated with Carboniferous to earliest Permian A-type anorogenic granites. We suggest, therefore, that a major, potentially plume-related rift event is common in NW Iran and it is potentially related to mafic flood basalt magmatism in the northernmost Arabian plate (Stern et al 2014). The alkaline mafic dykes and the Dare-Hedavand metagabbro from the Dorud-Azna region in the central SSZ are the southernmost occurrences of the mafic anorogenic magmatism within the SSZ and predate the suggested main stage Permian rifting of the SSZ (Hassanzadeh & Wernicke 2016).…”

Section: Discussionmentioning

confidence: 79%

“…However, in the last decade, more and more evidence has appeared for the existence of Carboniferous to earliest Permian orogenic events in Central Iran (Bagheri & Stampfli 2008;Zanchi et al 2009a and b;Buchs et al 2013;Kargaranbafghi et al 2015), in the Sanandaj-Sirjan Zone (Advay & Ghalamghash 2011;Bea et al 2011;Moghadam et al 2015) but also in the Eastern Pontides in Turkey (Topuz et al 2010;Kaygusuz et al 2012) and in the northern part of the Arabian plate (Tavakoli-Shirazi et al 2013;Frizon de Lamotte et al 2013;Stern et al 2014). Within the Palaeotethys, Bagheri & Stampfli (2008) postulated "Variscan" terrane accretion in Central Iran, also supported by abundant "Variscan" detritus in Mesozoic sediments of Central Iran (Kargaranbafghi et al 2015).…”

Section: Discussionmentioning

confidence: 99%

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Geochemical and isotopic evidence for Carboniferous rifting: mafic dykes in the central Sanandaj-Sirjan zone (Dorud-Azna, West Iran)

Shakerardakani¹,

Neubauer²,

Bernroider³

et al. 2017

Geologica Carpathica

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Abstract:In this paper, we present detailed field observations, chronological, geochemical and Sr-Nd isotopic data and discuss the petrogenetic aspects of two types of mafic dykes, of alkaline to subalkaline nature. The alkaline mafic dykes exhibit a cumulate to foliated texture and strike NW-SE, parallel to the main trend of the region. The 40 Ar/ 39 Ar amphibole age of 321.32 ± 0.55 Ma from an alkaline mafic dyke is interpreted as an indication of Carboniferous cooling through ca. 550 °C after intrusion of the dyke into the granitic Galeh-Doz orthogneiss and Amphibolite-Metagabbro units, the latter with Early Carboniferous amphibolite facies grade metamorphism and containing the Dare-Hedavand metagabbro with a similar Carboniferous age. The alkaline and subalkaline mafic dykes can be geochemically categorized into those with light REE-enriched patterns [(La/Yb) N = 8.32-9.28] and others with a rather flat REE pattern [(La/Yb) N = 1.16] and with a negative Nb anomaly. Together, the mafic dykes show oceanic island basalt to MORB geochemical signature, respectively. This is consistent, as well, with the (Tb/Yb) PM ratios. The alkaline mafic dykes were formed within an enriched mantle source at depths of ˃ 90 km, generating a suite of alkaline basalts. In comparison, the subalkaline mafic dykes were formed within more depleted mantle source at depths of ˂ 90 km. The subalkaline mafic dyke is characterized by 87 Sr/ 86 Sr ratio of 0.706 and positive ɛ Nd (t) value of + 0.77, whereas 87 Sr/ 86 Sr ratio of 0.708 and ɛ Nd (t) value of + 1.65 of the alkaline mafic dyke, consistent with the derivation from an enriched mantle source. There is no evidence that the mafic dykes were affected by significant crustal contamination during emplacement. Because of the similar age, the generation of magmas of alkaline mafic dykes and of the Dare-Hedavand metagabbro are assumed to reflect the same process of lithospheric or asthenospheric melting. Carboniferous back-arc rifting is the likely geodynamic setting of mafic dyke generation and emplacement. In contrast, the subalkaline mafic sill is likely related to the emplacement of the Jurassic Darijune gabbro.

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“…In addition, thermochronologic data show that the Late Devonian-Early Carboniferous uplift of the whole Arabian Plate and High Zagros Belt probably had a thermal and not tectonic origin (Kohn et al, 1992;Gavillot et al, 2010). Stern et al (2014) (Fig. 8).…”

Section: Local and Regional Tectonics As A Control On The Unconformitmentioning

confidence: 96%

Discussion on Palaeozoic discontinuities in the Kuh-e Surmeh area (Zagros, Iran)

Vennin

Kolodka

Asghari

et al. 2015

Marine and Petroleum Geology

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Early Carboniferous (∼357 Ma) crust beneath northern Arabia: Tales from Tell Thannoun (southern Syria)

Cited by 25 publications

References 44 publications

Panafrican basement and Mesozoic gabbro in the Zagros orogenic belt in the Dorud–Azna region (NW Iran): Laser-ablation ICP–MS zircon ages and geochemistry

Panafrican basement and Mesozoic gabbro in the Zagros orogenic belt in the Dorud–Azna region (NW Iran): Laser-ablation ICP–MS zircon ages and geochemistry

Geochemical and isotopic evidence for Carboniferous rifting: mafic dykes in the central Sanandaj-Sirjan zone (Dorud-Azna, West Iran)

Discussion on Palaeozoic discontinuities in the Kuh-e Surmeh area (Zagros, Iran)

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