Phase equilibria and P-T-t path of metapelitic rocks in SE-Hamedan, Sanandaj-Sirjan Zone, Iran

Mahmoudi, Shahryar; Baharifar, Ali Akbar

doi:10.1007/s00710-018-0635-2

Cited by 4 publications

(4 citation statements)

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“…In Boroujerd region, the tectonometamorphic evolution resembles that proposed by Mahmoudi and Baharifar (2019) probably pluton emplacement, especially the relatively hot mafic magmatic component of the complex (Jafari et al, 2020); this is a similar to the scenario proposed for the Hamedan region (Baharifar et al, 2019;Mahmoudi & Baharifar, 2019;Monfaredi et al, 2020;Saki et al, 2020;Sepahi et al, 2019). Therefore, the Hamedan and Boroujerd metamorphic sequences experienced a similar metamorphic evolution in the Lower to Middle Jurassic, which suggests along-strike metamorphic histories at this time are similar along the Sanandaj-Sirjan Zone.…”

Section: Metamorphism Along Hamedan To Boroujerd Regionssupporting

confidence: 73%

“…Studies of the metamorphic history of the Sanandaj-Sirjan Zone in Iran have mainly focused on the Hamedan region where low-to medium-grade metamorphic rocks are intruded by felsic to mafic bodies from the Middle to Late Jurassic Alvand Plutonic Complex (ca. 154-167 Ma; e.g., Sepahi & Fadavi, 2009;Sepahi, Jafari, Osanai, Shahbazi, & Moazzen, 2019;Shahbazi et al, 2010;Mahmoudi & Baharifar, 2019;Saki, Miri, & Oberhänsli, 2020;Monfaredi et al, 2020 and references therein). In Hamedan, poly-metamorphic (e.g., Monfaredi et al, 2020;Saki et al, 2020;Saki, Moazzen, & Baharifar, 2012) or a single counterclockwise metamorphic evolution (e.g., Baharifar, Whitney, Pang, Chung, & Iizuka, 2019;Mahmoudi & Baharifar, 2019) were proposed; these have significantly different tectonic implications for the Sanandaj-Sirjan Zone.…”

mentioning

confidence: 99%

“…See text for more details [Colour figure can be viewed at wileyonlinelibrary.com]The Hamedan metamorphic sequence records a complex P-T evolution. Some authors suggest a polymetamorphism evolution (e.g.,Monfaredi et al, 2020), whereas other points to a single counterclockwise metamorphic event(Baharifar et al, 2019;Mahmoudi & Baharifar, 2019) Monfaredi et al (2020). described three metamorphic events: M 1 from a relict mineral assemblage that included garnet, M 2 associated to a contact metamorphic overprint for intrusion of the Alvand iIgneous Complex (ca.…”

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confidence: 99%

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P–T–t path of the Boroujerd Complex, north‐west Sanandaj–Sirjan Zone, western Iran: Insights from phase equilibrium modelling and thermobarometry

Javanmard¹,

Verdecchia

Yakymchuk

et al. 2021

Geological Journal

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Handling Editor: M. Santosh Variations in the pressures and temperatures of metamorphism reflect the complexity of collisional orogenic systems. In the north-west Sanandaj-Sirjan Zone of western Iran, migmatites in the Boroujerd area record earlier dynamothermal metamorphism followed by the development of a contact metamorphic aureole induced by the Jurassic Boroujerd Batholith. Integrated micro-textural observations, mineral compositions, and the results of phase equilibrium modelling indicate that peak metamorphic temperatures reached 640-660 C in andalusite schists and~700 C in cordierite-sillimanite migmatites. The pressure does not exceed 3.5 kbar, implying a maximum depth of~13 km. A hairpin clockwise P-T path in the Boroujerd region was inferred from mineral relations (e.g., replacement of andalusite 1 by sillimanite in the migmatites in the heating stage, which was followed by a retrograde episode with growth of andalusite 2 ) and P-T pseudosections. Metamorphism of the Boroujerd area was coeval with voluminous intermediate-mafic magmatism, which provided the heat necessary for partial melting. This study demonstrates that metamorphic sequences of the north-west Sanandaj-Sirjan Zone developed under similar metamorphic conditions in the Lower to Middle Jurassic and record an extensional back-arc setting related to the subduction of Neo-Tethys.

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Section: Metamorphism Along Hamedan To Boroujerd Regionssupporting

confidence: 73%

mentioning

confidence: 99%

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confidence: 99%

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P–T–t path of the Boroujerd Complex, north‐west Sanandaj–Sirjan Zone, western Iran: Insights from phase equilibrium modelling and thermobarometry

Javanmard¹,

Verdecchia

Yakymchuk

et al. 2021

Geological Journal

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“…They reported that low visibility, wet roads, high-speed winds, and low temperatures could substantially increase RTA frequency ( 10 ). Another study by Mahmoudi in Iran (on Sanandaj-Hamedan intercity roads) found that high-speed winds, frost, and snowfall play major roles in the incidence rates of RTA ( 15 ). However, a study in Ardebil showed that most accidents occurred on clear and sunny days, and that crashes increased with rising temperature, and that foggy days had the lowest number of RTA ( 16 ).…”

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confidence: 99%

Relationship Between Air Pollution, Weather, Traffic, and Traffic-Related Mortality

et al. 2016

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BackgroundAir pollution and weather are just two of many environmental factors contributing to traffic accidents (RTA).ObjectivesThis study assessed the effects of these factors on traffic accidents and related mortalities in Ahvaz, Iran.MethodsIn this ecological study, data about RTA, traffic-related mortalities, air pollution (including NO, CO, NO2, NOx PM10, SO2, and O3 rates) and climate data from March 2008 until March 2015 was acquired from the Khuzestan State Police Force, the Environmental Protection Agency and the State Meteorological Department. Statistical analysis was performed with STATA 12 through both crude and adjusted negative binomial regression methods.ResultsThere was a significant positive correlation between increase in the monthly average temperature, the number of rainy days, and the number of frost days with the number of RTA (P < 0.05). Increased monthly average relative humidity, evaporation, and number of sunny days were negatively correlated with the frequency of RTA (P < 0.05). We also observed an inverse significant correlation between monthly average relative humidity, evaporation, and wind speed with traffic accident mortality (P < 0.05). Some air pollutants were negatively associated with the incidence rate of RTA.ConclusionsIt appears that some weather variables were significantly associated with increased RTA. However, increased levels of air pollutants were not associated with increased rates of RTA and/or related mortalities. Additional studies are recommended to explore this topic in more detail.

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High temperature – low pressure metamorphism during subduction of Neo-Tethys beneath the Iranian plate: evidence for mafic migmatite formation in the Alvand complex (western Iran)

2020

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Phase equilibria and P-T-t path of metapelitic rocks in SE-Hamedan, Sanandaj-Sirjan Zone, Iran

Cited by 4 publications

References 57 publications

P–T–t path of the Boroujerd Complex, north‐west Sanandaj–Sirjan Zone, western Iran: Insights from phase equilibrium modelling and thermobarometry

P–T–t path of the Boroujerd Complex, north‐west Sanandaj–Sirjan Zone, western Iran: Insights from phase equilibrium modelling and thermobarometry

Relationship Between Air Pollution, Weather, Traffic, and Traffic-Related Mortality

High temperature – low pressure metamorphism during subduction of Neo-Tethys beneath the Iranian plate: evidence for mafic migmatite formation in the Alvand complex (western Iran)

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