Tectonic evolution of the Zagros Orogen in the realm of the Neotethys between the Central Iran and Arabian Plates: An ophiolite perspective

Ajirlu, Majid Sudi; Moazzen, Mohssen; Hajialioghli, Robab

doi:10.1556/24.59.2016.001

Cited by 38 publications

(30 citation statements)

References 75 publications

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“…Previous models have proposed the formation of an intra-Neotethyan subduction zone in Mesozoic times, although its precise timing has been debated with estimates ranging from Jurassic (Ajirlu et al, 2016;Allahyari et al, 2010), Early Cretaceous (Agard et al, 2005;Saccani et al, 2013;Stampfli & Borel, 2002;Yousefirad, 2011), to Late Cretaceous (Dercourt et al, 1986;Desmons & Beccaluva, 1983). Moreover, the location of where subduction initiated within the Neotethys ocean has remained unclear.…”

Section: Cretaceous Intraoceanic Subductionmentioning

confidence: 99%

The Proto‐Zagros Foreland Basin in Lorestan, Western Iran: Insights From Multimineral Detrital Geothermochronometric and Trace Elemental Provenance Analysis

Barber

Stöckli

Galster

2019

Geochem Geophys Geosyst

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Detrital zircon (DZ) U‐Pb geochronology is a widely used provenance tool that leverages bedrock age signatures of hinterland source terranes. However, complex sediment recycling of multicycle zircon and hinterland provinces with nondiagnostic U‐Pb ages represent possible pitfalls for provenance reconstructions. Additional biases pertain to source rock zircon fertilities and insensitivity to low‐ and medium‐grade tectonothermal events that do not result in zircon generation. To bridge these inherent biases and gaps in DZ U‐Pb provenance data sets and derive more comprehensive tectonic reconstruction, this study combined U‐Pb and trace element analyses on DZ, apatite, and rutile as well as zircon (U‐Th)/He analyses from the Proto‐Zagros foreland basin in western Iran to shed light on Late Cretaceous tectonic accretion along Arabia. Integrated multimineral, multimethod data sets record formation of a 110‐ to 85‐Ma island arc within Triassic mid‐oceanic ridge crust of the Neotethys ocean, simultaneous obduction starting in Santonian‐Early Campanian times, and inversion of the Arabian rift margin. Overall, integration of these techniques constrains provenance based on multiple independent criteria including crystallization age, cooling history, and petrogenic‐geodynamic environment. This approach not only more completely described provenance signatures but also helped avoid significant pitfalls. For example, while Triassic DZ U‐Pb ages might be mistaken as input from Eurasia, zircon trace element analysis reveals a MORB signature and attributes these DZ to Neotethyan oceanic rather than Eurasian continental origin, having fundamentally different paleogeographic/tectonic implications for the Arabia‐Eurasia collision. Moreover, detrital rutile and apatite resolve and characterize multiple Paleozoic‐Mesozoic thermotectonic events not recorded by DZ U‐Pb due to their largely amagmatic nature.

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Section: Cretaceous Intraoceanic Subductionmentioning

confidence: 99%

The Proto‐Zagros Foreland Basin in Lorestan, Western Iran: Insights From Multimineral Detrital Geothermochronometric and Trace Elemental Provenance Analysis

Barber

Stöckli

Galster

2019

Geochem Geophys Geosyst

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“…The Babakoohi Anticline in Fars province, north of Shiraz, is part of the Zagros orogenic belt. This orogenic belt has a northwest-southeast trend and a length of about 1,800 km in a folded sedimentary basin, which is the result of the convergence of the Afro-Arabia and Eurasian continents in the Late Cretaceous and is still active (Stocklin 1974;Berberian and King 1981;Alavi 2004;Sarkarinejad and Azizi 2008;Agard et al 2011;Pireh et al 2015;Ajirlu et al 2016;Sarkarinejad and Heibati 2016). This orogenic belt spreads from the east of Turkey to the north of Iraq and the northwest of Iran to the islands of Hormuz and Oman (Alavi 1994;MacQuarrie 2004;Homke et al 2010;Agard et al 2011;Ajirlu et al 2016).…”

Section: Geologic Settingmentioning

confidence: 99%

Application of genetic and K-means algorithms in clustering Babakoohi Anticline joints north of Shiraz, Iran

Kazemi

Yazdjerdi

Asadi

et al. 2020

Central European Geology

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The fuzzy clustering technique is one of the ways of organizing data that presents special patterns using algorithms and based on the similarity level of data. In this study, in order to cluster the resulting data from the Babakoohi Anticline joints, located north of Shiraz, K-means and genetic algorithms are applied. The K-means algorithm is one of the clustering algorithms easily implemented and of fast performance; however, sometimes this algorithm is located in the local optimal trap and cannot respond with an optimal answer, due to the sensitivity of this algorithm to the centers of the primary cluster. In addition, it has some basic disadvantages, such as its inappropriateness for complicated forms and also the dependency of the final result upon the primary cluster. Therefore, in order to perform the study more accurately and to obtain more reliable results, the genetic algorithm is used for categorizing the data of joints of the studied area. Applying this algorithm for leaving the local optimal points is an effective way. The results of clustering of the aforementioned data using the two above techniques represent two clusters in the Babakoohi Anticline. Furthermore, for validity and surveying of the results of the suggested techniques, various mathematical and statistical techniques, including ICC, Vw, VMPC, and VPMBF, are applied, which supports the similarity of the obtained results and the data clustering process in two algorithms.

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“…Also, ac cording to Stampfli and Borel (2004), there was a back-arc ocean ba sin called the "Izanca ocean" with pas sive mar gins at 180-121 Ma. More over, such ten sional back-arc bas ins have been re ported by some au thors in dif fer ent lo ca tions of the Zagros orog eny: the "Nain-Baft" ba sin in the SE (e.g., Shahbpour, 2005;Hosseini et al, 2017) and the "Khoy-Zanjan" ba sin (e.g., Ajirlu et al, 2016) in the NW.…”

Section: Implications For Tectonic Settingmentioning

confidence: 99%

Cretaceous magmatic evolution in the Deylaman igneous complex, Alborz zone, Iran: change from extensional to compressional regime

Akmali

Asiabanha

Haghnazar

2019

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As so ci ate ed i tor: Tomasz Bajda The Deylaman ig ne ous com plex, as a part of the Late Cre ta ceous rock unit that lies be hind the Paleogene Alborz mag matic arc, in the north ern Alborz zone, is com posed of ba saltic sheet lavas al ter nat ing with the pe lagic cal car e ous sed i ments, basaltic pil low lavas, fel sic lavas and gabbroic-monzodioritic in tru sions. The pe lagic cal car e ous de pos its con tain microfossils rep re sent ing the Santonian-Maastrichtian ages. Fur ther more, petrographic tex tures such as the hyalomicrolitic tex ture and swal low-tail plagioclase crys tals in the pil low lavas, and also seg re ga tion ves i cles in the ba saltic sheet lavas, im ply high exter nal (hy dro static) pres sures as the magma was ex truded in a deep-wa ter en vi ron ment. The rock sam ples show both compositional bimodality and char ac ter is tic trends in the vari a tion di a grams. Also, some geo chem i cal char ac ter is tics im ply that the ba saltic lavas orig i nated from the par tial melt ing of an undepleted deep man tle source con tain ing spinel lherzolite: the en rich ment pat terns of LREE/HREE ra tios of the sam ples [(La/Yb)n = 3.93-4.16 for ba saltic lavas and 10.92 for fel sic lavas] ly ing be tween those char ac ter is tic of OIBs [(La/Yb)n = 12.92] and EMORBs [(La/Yb)n = 1.91]; sim i lar i ties be tween the pat terns of multi-el e ment spi der-di a grams; LILE bulges in the ba saltic sam ples com pared with those of OIBs. More over, the sam ples show in flu ence from two geotectonic en vi ron ments: su pra-subduction zone (SSZ) set tings and plume-type within-plate mag mas. There fore, be cause of the deep sub ma rine en vi ron ment in ferred for the ef fu sive vol ca nic erup tions in Santonian-Maastrichtian time, it seems that the Deylaman ig ne ous com plex evolved through two stages: first, a ten sional re gime in a su pra-subduction zone (far ther from the Me so zoic mag matic arc) and for ma tion of an em bry onic rift-re lated oceanic ba sin in the Late Ju ras sic-Early Cre ta ceous; sec ondly, a com pres sive re gime in the Late Cre ta ceous-Early Paleocene and in land mi gra tion of the mag matic arc. Con se quently, the Cre ta ceous magmatism can be in ter preted as a pre lude to the Eocene mag matic flare-up in the mag matic arcs of Iran.

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Tectonic evolution of the Zagros Orogen in the realm of the Neotethys between the Central Iran and Arabian Plates: An ophiolite perspective

Cited by 38 publications

References 75 publications

The Proto‐Zagros Foreland Basin in Lorestan, Western Iran: Insights From Multimineral Detrital Geothermochronometric and Trace Elemental Provenance Analysis

The Proto‐Zagros Foreland Basin in Lorestan, Western Iran: Insights From Multimineral Detrital Geothermochronometric and Trace Elemental Provenance Analysis

Application of genetic and K-means algorithms in clustering Babakoohi Anticline joints north of Shiraz, Iran

Cretaceous magmatic evolution in the Deylaman igneous complex, Alborz zone, Iran: change from extensional to compressional regime

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