Petrogenesis and Tectono-Magmatic Setting of Meso-Cenozoic Magmatism in Azerbaijan Province, Northwestern Iran

Jamali, Hemayat; Yaghubpur, Abdolmajid; Mehrabi, Behzad; Dilek, Yıldırım; Daliran, Farahnaz; Meshkani, Ahmad

doi:10.5772/24782

Cited by 9 publications

(4 citation statements)

References 38 publications

(24 reference statements)

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“…Referring to Azizi and Moinevaziri (2009), the MORB and calc-alkaline basalts of the SBV zone indicate an island-arc affinity. The SBV subzone that formed between the ophiolite-bearing suture zone and the SSZ belongs to an oceanic arc, resulting from the subduction of part of the Neo-Tethys oceanic crust under another oceanic crust fragment (Azizi and Moinevaziri, 2009;Jamali et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Saqez–Sardasht Goldfield, North Sanandaj‐Sirjan Zone, Iran: A Tectono‐Metallogenic Synthesis

Haji

Safari

Bafti

et al. 2020

Acta Geologica Sinica (Eng)

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The Sanandaj-Sirjan Zone (SSZ), as the metamorphic-magmatic core of the Zagros Orogen in southwestern Iran, contains several styles of gold deposit of Phanerozoic age. The northern SSZ includes an ENE-trending goldfield belt. This area that encompasses the main orogenic gold deposits, e.g., Qolqoleh, Kervian, Qabaqhlujeh, and the Barika VMS goldfield, was chosen for this research to study the spatial and temporal relationships between gold mineralization and orogenic phases. Regarding the rock unit variations, metamorphism, magmatism and the settings of the structures, the study area is divided into four distinct tectonic blocks, separated by three main NW-trending thrust faults (suture lines) including, from NE to SW, the Tamugheh, the Ebrahim Hesar and the Zagros main thrust (ZMT) faults. The area between the Tamugheh and Ebrahim Hesar faults is a tectonized/uplifted basement of accretionary wedge-originated thrust slivers, hosting the above orogenic gold mineralizations. The other area between the here termed Ebrahim Hesar fault and the ZMT is an island-arc basin, proposed here as the Sardasht-Barika zone, including the only recognized massive sulfide gold district all over the SSZ, named Barika. The Barika goldfield was metamorphosed, deformed and enriched due to the islandarc collision to the Arabian continent, before the closure of Neotethys on the eastern flank.

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Section: Discussionmentioning

confidence: 99%

Saqez–Sardasht Goldfield, North Sanandaj‐Sirjan Zone, Iran: A Tectono‐Metallogenic Synthesis

Haji

Safari

Bafti

et al. 2020

Acta Geologica Sinica (Eng)

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“…Email: rashid@modares.ac.ir syenite. Genetically, they belong to I-, A-, and S-type granitoids and formed during syn-to post-collision events in subduction zones (Ghalamghash et al 2009;Mazhari et al 2011;Jamali et al 2012). Recent research reveals that plutonic activity in the SSZ was limited to producing not only calc-alkaline magmas but also tholeiitic, alkaline, and shoshonitic rocks (Azizi et al 2011;Mahmoudi et al 2011;Mazhari et al 2011).…”

Section: Introductionmentioning

confidence: 98%

Mafic–intermediate plutonic rocks of the Salmas area, northwestern Iran: their source and petrogenesis significance

Ghaffari

Rashidnejad‐Omran

Dabiri

et al. 2013

International Geology Review

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The Salmas area, in the northernmost part of the Sanandaj-Sirjan zone of Iran, contains a crystalline mafic-intermediate complex that intrudes into the Precambrian metamorphic basement complex and is composed of gabbroic and gabbrodiorite cumulates and fine-grained non-cumulate gabbronorites and diorites. These rocks have fine-to coarse-grained texture and are mainly composed of plagioclase, pyroxenes, and amphibole. Major element geochemistry indicates that the pluton has a low-K with tholeiitic affinity. Variations of major and trace elements on Harker diagrams, including negative correlations MgO, Fe 2 O 3 , CaO, and Co and positive correlations Na 2 O, K 2 O, Rb, Ba, and La, with increasing SiO 2 and chondrite-normalized REE patterns, suggest that fractional crystallization of gabbroic rocks could have played a significant role in the formation of evolved rocks. The chondrite-normalized REE patterns are not fractionated (La N /Lu N = 1.3-5.4) and display strong Eu anomalies (Eu/Eu * = 1.15-1.76) in cumulate rocks, which we attributed to cumulus plagioclase. Sr and Nd isotopic ratios vary from 0.704698 to 0.705866 and from 0.512548 to 0.512703, respectively. Gabbronorites with high 143 Nd/ 144 Nd ratios, low 87 Sr/ 86 Sr ratios, and high MgO, Ni, and Cr contents indicate that they were generated from relatively primitive magmas. We used petrogenetic modelling to constrain sources. Trace element ratio modelling indicates that the gabbroic rocks were generated from a spinel-peridotite source via 5-20% degrees of fractional melting at a depth of ∼52 km. Major and REE modelling shows that the diorites are the products of fractional crystallization of gabbronorites.

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“…1) (Alberti et al 1980;Yilmaz et al 1990;Trifonov et al 2012;Kheirkhah & Mirnejad 2014). Some researchers suggest that there is a petrogenetic relationship between the Cenozoic magmatism of this igneous province and those of Alborz and UDMA in Iran (Alberti et al 1976;Innocenti et al 1982;Jahangiri 2007;Azizi & Moinevaziri 2009;Ahmadzadeh et al 2010;Allen et al 2011;Dabiri et al 2011;Jamali et al 2012).…”

Section: General Geologymentioning

confidence: 99%

Crystal size and shape distribution systematics of plagioclase and the determination of crystal residence times in the micromonzogabbros of Qisir Dagh, SE of Sabalan volcano (NW Iran)

Pourkhorsandi¹,

Mirnejad²,

Raiesi³

et al. 2015

Geologica Carpathica

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Abstract:The Qisir Dagh igneous complex occurs as a combination of volcanic and intrusive rocks to the south-east of the Sabalan volcano, north-western Iran. Micromonzogabbroic rocks in the region consist of plagioclase, alkaline feldspar and clinopyroxene as the major mineral phases and orthopyroxene, olivine, apatite and opaque minerals as the accessory minerals. Microgranular and microporphyritic textures are well developed in these rocks. Considering the importance of plagioclase in reconstructing magma cooling processes, the size and shape distribution and chemical composition of this mineral were investigated. Based on microscopic studies, it is shown that the 2-dimensional size average of plagioclase in the micromonzogabbros is 538 micrometers and its 3-dimensional shape varies between tabular to prolate. Crystal size distribution diagrams point to the presence of at least two populations of plagioclase, indicating the occurrence of magma mixing and/or fractional crystallization during magma cooling. The chemical composition of plagioclase shows a wide variation in abundances of Anorthite-Albite-Orthoclase (An = 0.31-64.58, Ab =29.26-72.13, Or = 0.9-66.97), suggesting a complex process during the crystal growth. This is also supported by the formation of antiperthite lamellae, which formed as the result of alkali feldspar exsolution in plagioclase. The calculated residence time of magma in Qisir Dagh, based on 3D crystal size distribution data, and using growth rate G = 10 -10 mm/s, varies between 457 and 685 years, which indicates a shallow depth (near surface) magma crystallization and subvolcanic nature of the studied samples.

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Petrogenesis and Tectono-Magmatic Setting of Meso-Cenozoic Magmatism in Azerbaijan Province, Northwestern Iran

Cited by 9 publications

References 38 publications

Saqez–Sardasht Goldfield, North Sanandaj‐Sirjan Zone, Iran: A Tectono‐Metallogenic Synthesis

Saqez–Sardasht Goldfield, North Sanandaj‐Sirjan Zone, Iran: A Tectono‐Metallogenic Synthesis

Mafic–intermediate plutonic rocks of the Salmas area, northwestern Iran: their source and petrogenesis significance

Crystal size and shape distribution systematics of plagioclase and the determination of crystal residence times in the micromonzogabbros of Qisir Dagh, SE of Sabalan volcano (NW Iran)

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