Arabian Journal of Geosciences

, Volume 4, Issue 7–8, pp 1207–1214 | Cite as

The origin of mafic rocks in the Naqadeh intrusive complex, Sanandaj-Sirjan Zone, NW Iran

  • Seyed Ali MazhariEmail author
  • Sadraldin Amini
  • Jalil Ghalamghash
  • Fernando Bea
Original paper


The Naqadeh mafic plutonic rocks are located on a plutonic assemblage and include different granitoid rocks related to ∼40 Ma. U-Pb SHRIMP data shows different ages of 96 ± 2.3 Ma for mafic rocks. Naqadeh mafic plutonic rocks consist of diorite to diorite-gabbros with relatively high contents of incompatible elements, low Na2O, and \( {\hbox{Mg\# }} = \left[ {{\hbox{molar}}\;{100} \times {\hbox{MgO/}}\left( {{\hbox{MgO}} + {\hbox{FeO}}} \right)} \right] > 44.0 \). These features suggest that the Naqadeh mafic rocks originate from enriched lithospheric mantle above subducted slab during Neotethys subduction under Iranian plate.


Iran Naqadeh Sanandaj-Sirjan Zone Pluton Mafic intrusive Mantle lithosphere 

أصل الصخور المافية فى معقدة ناقدة المتداخلة، نطاق سانانداج-سيرجان، شمال غرب إيران

تقع صخور ناقدة المافية البلوتونية فى تجمع بلوتونى يتضمن صخور جرانيتية مختلفة يرجع عمرها إلى 40 مليون سنة. دلت بيانات U-Pb SHRIMP إلى أعمار مختلفة (96 ± 2.3 مليون سنة) للصخور المافية. تتكون صخور ناقدة المافية البلوتونية من دايوريت – جابرو مع محتوى أكبر نسبيا من عناصر متضاربة و محتوى أقل منmolar 100*MgO/(MgO + FeO) > 44)) Na2O and Mg#. تبين هذه المعالم أن صخور ناقدة المافية نشأت من وشاح غنى فوق البلاطة أو اللوح الغاطس أثناء غطس النيوتيتش تحت اللوح الإيراني.



We are grateful to Pillar Montero and J. Molina in Granada University, Spain, for analytical support and valuable suggestion during research scholarship funded by the Iranian Ministry of Science and Technology.


  1. Ahmadi Khalaji A, Esmaeily D, Valizadeh MV, Rahimpour-Bonab H (2007) Petrology and geochemistry of the granitoid complex of Boroujerd, Sanandaj-Sirjan Zone, Western Iran. J Asian Earth Sci 29:859–877CrossRefGoogle Scholar
  2. Alavi M (1994) Tectonics of the Zagros Orogenic belt of Iran: new data and interpretations. Tectonophysics 229:211–238CrossRefGoogle Scholar
  3. Alavi M (2004) Regional stratigraphy of the Zagros fold-thrust belt of Iran and its proforeland evolution. Am J Sci 304:1–20CrossRefGoogle Scholar
  4. Altherr R, Holl A, Hegner E, Langer C, Kreuzer H (2000) High potassium calc-alkaline Plutonism in the European Variscides: northern Vosges (France) and northern Schwarzwald (Germany). Lithos 50:51–73CrossRefGoogle Scholar
  5. Berberian M, King GCP (1981) Towards a paleogeography and tectonic evolution of Iran. Can J Earth Sci 18:210–265CrossRefGoogle Scholar
  6. Black LP, Kamo SL, Allen CM, Aleinikoff JA, Davis DW, Korsch RJ, Foudoulis C (2003) TEMORA 1: a new zircon standard for Phanerozoic U-Pb geochronology. Chem Geol 200:155–170CrossRefGoogle Scholar
  7. Cox KG, Bell JD, Pankhurst RJ (1979) The interpretation of igneous rocks. Allen and Unwin, London, p 450Google Scholar
  8. Eftekharnejad J (1973) (1:250000) Geological map of Mahabad. Geological Survey of Iran PressGoogle Scholar
  9. Ghalamghash J (2002) Petrology and emplacement of Urumieh-Oshnavieh plutons. Ph. D. thesis (in Persian). Shahid Beheshti University, Tehran, p 259Google Scholar
  10. Ghasemi A, Talbot CJ (2006) A new tectonic scenario for the Sanandaj-Sirjan Zone (Iran). J Asian Earth Sci 26:683–693CrossRefGoogle Scholar
  11. Khodabandeh AA, Soltani GA (2004) (1:10000) geological map of Naqadeh, Geological Survey of Iran PressGoogle Scholar
  12. Ludwig KR (2002) SQUID 1.03: a user's manual. Berkeley Geochronology Center. Special Publication, 2Google Scholar
  13. Mazhari SA (2008) Petrogenesis of Naqadeh-Sardasht plutons. Ph.D thesis, Tarbiat Moallem University, 216 p (in Persian)Google Scholar
  14. Mazhari SA, Bea F, Amini S, Ghalamghash J, Molina JF, Pillar M, Scarrow JH, Williams S (2009) The Eocene bimodal Piranshahr massif of the Sanandaj-Sirjan Zone, NW Iran. A marker of the end of the collision in the Zagros Orogen. J Geol Soc 166:53–69CrossRefGoogle Scholar
  15. Mazhari SA, Amini S, Ghalamghash J (2010) Petrogenesis of granitic unit of Naqadeh complex, Sanandaj-Sirjan Zone, NW Iran. Arab J Geosci. doi: 10.1007/s12517-009-0077-6 Google Scholar
  16. Mohajjel M, Fergusson CL (2000) Dextral transpression in Late Cretaceous continental collision, Sanandaj-Sirjan Zone, western Iran. J Struct Geol 22:1125–1139CrossRefGoogle Scholar
  17. Numan NMS (2001) Discussion on “Dextral transpression in Late Cretaceous continental collision, Sanandaj-Sirjan Zone, western Iran” [Journal of Structural Geology, 22(8) (2000) 1125–1139]. J Struct Geol 23(12):2033–2034CrossRefGoogle Scholar
  18. Rapp RP, Watson EB (1995) Dehydration melting of metabasalt at 8–32 kbar: implications for continental growth and crust-mantle recycling. J Petrol 36:891–931Google Scholar
  19. Sengor AMC, Natal'in BA (1996) Paleotectonics of Asia: fragments of the synthesis. In: Yin A, Harrison TM (eds) The tectonic evolution of Asia. Cambridge University Press, Cambridge, pp 486–640Google Scholar
  20. Sepahi Garow A (1999) Petrology of Alvand pluton assemblage, Ph.D. thesis, Tarbiat Moallem University, 302 p (in Persian)Google Scholar
  21. Stacey JS, Kramers JD (1975) Approximation of terrestrial lead isotope evolution by a two-stage model. Earth Planet Sci Lett 26:207–221CrossRefGoogle Scholar
  22. Sun SS, McDonough WF (1989) Chemical and isotopic systematics of the oceanic basalts: implications for mantle composition and processes. In: Saunder AD, Norry MJ (eds) Magmatism in the Oceanic Basalts. Geological Society of London, London, pp 313–345Google Scholar
  23. Thompson AB, Connolly AD (1995) Melting of the continental crust: some thermal and petrological constraints on anatexis in continental collision zones and other tectonic settings. J Geophys Res 100:15565–15579CrossRefGoogle Scholar
  24. Williams IS, Claesson S (1987) Isotopic evidence for the Precambrian provenance and Caledonian metamorphism of high grade paragneisses from the Seve Nappes, Scandinavian Caledonides. II: Ion microprobe zircon U-Th-Pb. Contrib Miner Petrol 97:205–217CrossRefGoogle Scholar
  25. Wilson M (1989) Igneous Petrogenesis. Unwin Hyman, London, p 456CrossRefGoogle Scholar
  26. Wolf MB, Wyllie PJ (1994) dehydration melting of amphibolite at 10 kbar: the effects of temperature and time. Contrib Miner Petrol 115:369–383CrossRefGoogle Scholar

Copyright information

© Saudi Society for Geosciences 2010

Authors and Affiliations

  • Seyed Ali Mazhari
    • 1
    Email author
  • Sadraldin Amini
    • 2
  • Jalil Ghalamghash
    • 3
  • Fernando Bea
    • 4
  1. 1.Department of GeologyPayame Noor University (PNU)SabzevarIran
  2. 2.Department of GeologyTarbiat Moallem UniversityTehran,Iran
  3. 3.Department of PetrologyGeological Survey of IranTehranIran
  4. 4.Department of Mineralogy and PetrologyUniversity of GranadaGranadaSpain

Personalised recommendations