Bourgeix, “Igneous banding, schlieren and mafic enclaves in calc-alkaline granites: The Budduso pluton (Sardinia),” Lithos 104, 147–163 (2008).Ī. Webb, “The geochemical characteristics of granitoids in contrasting arcs and comments on magma sources,” J. King, “Towards a paleogeography and tectonic evolution of Iran,” Can. Barbarin, “Mafic magmatic enclaves and mafic rocks associated with some granitoids of the central Sierra Nevada batholith, California: Nature, origin, and relations with the hosts,” Lithos 80, 155–177 (2005). Foden, “Post-collisional transition from an extensional volcano-sedimentary basin to the continental arc in the Alborz Ranges, North Iran,” Lithos 148, 98–111 (2012).ī. Oliveira, “Geochemistry and zircon geochronology of the I-type high-K calc-alkaline and S-type granitoid rocks from Southeastern Roraima, Brazil: Orosirian collisional magmatism evidence (1.97–1.96 Ga) in central portion of Guyana Shield,” Precambrian Res. Corfu, “Geochemistry of S-type-granitic rocks from the reversely zoned Castelo Branco plutonicicic (Central Portugal),” Lithos 103, 445–465 (2008). Anthony, “Source regions of granites and their links to tectonic environment: examples from the Western United States,” Lithos 80, 61–74 (2005). Isfahan, Isfahan, Iran, 2003) (in Persian).Į. Ahankoob, Mineralogical and Geochemical Studies of the Metamorphic Aureole in Ghohroud Granitoid Intrusion Body. “High-potassium, calc-alkaline I-type plutonism in the European Variscides: Northern Vosges (France) and northern Schwarzwald (Germany),” Lithos 50, 51–73 (2000).
Morozov, “Geology of the Khur Area (Central Iran), Explanatory text of the Khur Quadrangle Map 1 : 250 000,” (V/O Technoexport Report TE/ No. Murata, “High magmatic flux during Alpine-Himalayan collision: Constraints from the Kal-e-Kafi complex, Central Iran,” GSA Bull. Alavi, “Structures of the Zagros fold-thrust belt in Iran,” Am. Alavi, “Tectonics of the Zagros orogenic belt of Iran: New data and interpretations,” Tectonophysics 229, 211-238 (1994). Wortel, “Zagros orogeny: a subduction-dominated process,” Geol. Mouthereau, “Convergence history across Zagros (Iran), Constraints from collisional and earlier deformation,” Int. Petrographic and geochemical characteristics in combination with geodynamic evidence, offer that host rocks and associated enclaves originated by interaction between lower crust‒derived felsic and mantle derived mafic magmas in an active continental margin arc environment, during the subduction of the Neotethyan oceanic plate under the Central Iran continental crust. The Qazan granitoids were injected along the extensional shear zones relevant to the dextral transpressional replacements. Field research suggested the magma ascended mainly in the NE–SW and NE–SW faults direction. Primitive mantle-normalized spidergrams show enrichment of large ion lithophile elements (Rb, Ba, Th, U), as well as depletion of high-field strength elements (Nb, Ti). The Qazan pluton rocks with SiO 2 content of 57.37 to 66.89 (wt %) are metaluminous to weakly peraluminous with A/CNK ratios of (>1.1) and show calc-alkaline I-type affinity. The Qazan pluton consists of mafic microgranular enclaves ranging from a few centimeters to meters in size.
The Qazan pluton intruded into the Eocene volcano-sedimentary and Qom formation units. Granodiorite is the most predominant rock unit, which is composed of quartz, plagioclase, K-feldspar, hornblende, and biotite as main mineral phases. The plutonic body includes in its composition granodiorite, quartzdiorite, tonalite, and monzogranite. The Qazan granitoid pluton (South of Kashan, Iran) is situated in the central part of the Urumieh–Dokhtar Magmatic Arc.