Geochemistry and petrology of igneous assemblage in the south of Qorveh area, west Iran

Maànijou, Mohammad; Aliani, Farhad; Miri, Mirmohammad; Lentz, David R.

doi:10.1016/j.chemer.2013.04.001

Cited by 20 publications

(22 citation statements)

References 53 publications

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“…Here we compare the whole‐rock geochemical compositions of South Dehgolan granites with published data from other A‐type granites of the SSZ such as Alvand (Shahbazi et al ., ), Azna (Shabanian et al ., ), Cheshmeh‐Sefid (Davoudian et al ., ) Ghorveh (Maanijou et al ., ), and Saqqez (Sepahi and Athari, ).…”

Section: Discussionmentioning

confidence: 99%

“…Calculated zircon saturation temperatures for aluminous A‐type granites are higher than those of other granite types. The calculated average zircon saturation temperatures of the Ghorveh granite (Maanijou et al ., ), Saqqez granite (Sepahi and Athari, ) and Azna granite (Shabanian et al ., ) are 850 °C, 825 °C and 911 °C, respectively, suggesting that these A‐type granites were formed at relatively high temperatures. The Alvand granites (Shahbazi et al ., ) and Cheshmeh‐Sefid granite (Davoudian et al ., ) crystallized from a magma with relatively lower temperatures (<800 °C), lower than in most A‐type granites.…”

Section: Discussionmentioning

confidence: 99%

“…14) are proposed to distinguish Atype granites from other granites. In these diagrams, the Ghorveh granite (Sepahi and Athari, 2006) and Azna granite (Shabanian et al, 2009) plot in the A-type field, but the Saqqez granite (Sepahi and Athari, 2006), Alvand granite (Maanijou et al, 2011) and Cheshmeh-Sefid granite (Davoudian et al, 2007) plot outside the A-type granite field.…”

Section: Comparison With Other A-type Granitesmentioning

confidence: 99%

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Transition from I‐type to A‐type magmatism in the Sanandaj–Sirjan Zone, NW Iran: an extensional intra‐continental arc

et al. 2015

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The South Dehgolan pluton, in NW Iran was emplaced into the Sanandaj–Sirjan magmatic–metamorphic zone. This composite intrusion comprises three main groups: (1) monzogabbro–monzodiorite rocks, (2) quartz monzonite–syenite rocks, and (3) a granite suite which crops out in most of the area. The granites generally show high SiO2 content from 72.1%–77.6 wt.% with diagnostic mineralogy consisting of biotite and amphibole along the boundaries of feldspar–quartz crystals which implies anhydrous primary magma compositions. The granite suite is metaluminous and distinguished by high FeOt/MgO ratios (av. 9.6 wt.%), typical of ferroan compositions with a pronounced A‐type affinity with high Na2O + K2O contents, high Ga/Al ratios, enrichment in Zr, Nb, REE, and depletion in Eu. The quartz monzonite–syenites show intermediate SiO2 levels (59.8%–64.5 wt.%) with metaluminous, magnesian to ferroan characteristics, intermediate Na2O + K2O contents, enrichment in Zr, Nb, REE, Ga/Al, and depletion in Eu. The monzogabbro–monzodiorites show overall lower SiO2 content (48.5%–55.9 wt.%) with metaluminous and calc‐alkaline compositions, relatively lower Na2O + K2O contents, low Ga/Al ratios, and FeOt/MgO (av. 1.6 wt.%) ratios, low abundances of Zr, Nb, and lower REE element concentrations relative to the granites and quartz monzonite–syenites. These geochemical differences among the three different rocks suites are likely to indicate different melt origins. We suggest that the South Dehgolan pluton resulted from a change in the geodynamic regime, from compression to extension in the Sanandaj–Sirjan zone during Mesozoic subduction of the Neo‐Tethys oceanic crust beneath the Central Iranian microcontinent. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Comparison With Other A-type Granitesmentioning

confidence: 99%

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Transition from I‐type to A‐type magmatism in the Sanandaj–Sirjan Zone, NW Iran: an extensional intra‐continental arc

et al. 2015

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“…Most studies of Jurassic SaSZ igneous rocks consider that these formed at a convergent plate margin (Berberian & Berberian, ; Deevsalar et al, ; Esna‐Ashari, Tiepolo, Valizadeh, Hassanzadeh, & Sepahi, ; Khalaji, Esmaeily, Valizadeh, & Rahimpour‐Bonab, ; Maanijou, Aliani, Miri, & Lentz, ; Sepahi, Salami, Lentz, McFarlane, & Maanijou, ; Shahbazi et al, ). Recent works have increasingly questioned this interpretation (Azizi, Lucci, Stern, Hasannejad, & Asahara, ; Hunziker, Burg, Bouilhol, & Quadt, ; Zhang, Chen, Yang, Hou, & Aghazadeh, ).…”

Section: Introductionmentioning

confidence: 99%

Jurassic igneous rocks of the central Sanandaj–Sirjan zone (Iran) mark a propagating continental rift, not a magmatic arc

Azizi

Stern

2019

Terra Nova

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Jurassic igneous bodies of the Sanandaj-Sirjan zone (SaSZ) in SW Iran are generally considered as a magmatic arc but critical evaluation of modern geochronology, geochemistry and radiogenic isotopes challenges this conclusion. There is no evidence for sustained igneous activity along the ~1,200 km long SaSZ, as expected for a convergent plate margin; instead activity was brief at most sites and propagated NW at ~20 mm/a. Jurassic igneous rocks define a bimodal suite of gabbro-diorite and granite. Chemical and isotopic compositions of mafic rocks indicate subcontinental lithospheric mantle sources that mostly lacked subduction-related modifications. The arc-like features of S-type granites reflect massive involvement of Cadomian crust and younger sediments to generate felsic melts in response to mafic intrusions. We conclude that Jurassic SaSZ igneous activity occurred in a continental rift, not an arc. SaSZ igneous rocks do not indicate that subduction along the SW margin of Eurasia began in Jurassic time. NW SE 130 J s J s Legend Jurassic metavolcanic Jurassic hornfels Jurassic granitoids Jurassic unmetamorphosed rocks S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section at the end of the article. How to cite this article: Azizi H, Stern RJ. Jurassic igneous rocks of the central Sanandaj-Sirjan zone (Iran) mark a propagating continental rift, not a magmatic arc. Terra Nova.

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“…In fact the Mesozoic granitoids in the SSZ are rarely associated with porphyry Cu deposits (Zamanian & Asadollahi, ). As the Mesozoic intrusions of the SSZ and the Bazman granitoids belong to early stages of subduction of the Neo‐Tethys oceanic crust beneath southern Iran (Berberian, ; Berberian et al ., ; Maanijou et al ., ), the thickness of the sialic crust and shortening are less than those of UDB and Chagai belt.…”

Section: Discussionmentioning

confidence: 85%

Metallogeny and Mineralization Potential of the Bazman Granitoids, SE Iran

et al. 2016

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The Mesozoic Bazman granitoids are located in Sistan and Baluchestan province, southeastern Iran. Geology of the study area consists of Carboniferous shale, sandstone, and limestone and Permian siltstone, shale, sandstone, limestone, and dolomite that were intruded by the Bazman granitoids. These granitoids include various phases of granite, granodiorite, quartz-monzodiorite, monzodiorite, diorite, and gabbro. They are metaluminous to slightly peraluminous, reduced, calc-alkaline and I-type, and display geochemical characteristics of continental margin (ensialic) granitoids. In this paper, field, petrography, and geochemical data were used to discriminate the Bazman granitoids either as productive or barren granitoids. Although there are a few skarn-related mineral occurrences adjacent to the Bazman granitoids, most exposed intrusions are not hydrothermally altered and mineralized. Rb/Sr, Zr/Hf, and K/Rb ratios indicate that the granitic magmas that formed most of the Bazman granitoids indicate that they are moderately evolved and have generally not undergone post-magmatic hydrothermal activity. The Sm/Eu and Rb/Ba ratios and the concentrations of Rb, Ba, and Sr within the aforementioned granitoids show that the rocks are similar to the averages of granitoids devoid of Li, Be, U, Sn, W, and Ta deposits. The I-type arc characteristics and other geochemical features of the Bazman granitoids show that they are not typical of parental magmas to Sn, W, Mo, and Zn mineralization, but are mainly fertile for Cu and Fe (Au) skarn-related granitoids.

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Geochemistry and petrology of igneous assemblage in the south of Qorveh area, west Iran

Cited by 20 publications

References 53 publications

Transition from I‐type to A‐type magmatism in the Sanandaj–Sirjan Zone, NW Iran: an extensional intra‐continental arc

Transition from I‐type to A‐type magmatism in the Sanandaj–Sirjan Zone, NW Iran: an extensional intra‐continental arc

Jurassic igneous rocks of the central Sanandaj–Sirjan zone (Iran) mark a propagating continental rift, not a magmatic arc

Metallogeny and Mineralization Potential of the Bazman Granitoids, SE Iran

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