LA-ICP-MS zircon U-Pb geochronology on migmatites from the Boroujerd region, Sanandaj-Sirjan zone, Zagros Orogen, Iran: provenance analysis and metamorphic age

Document Type : Research Paper

Authors

1 Department of Geology, Payame Noor University, PO BOX 19395-3697, Tehran, Iran

2 Department of Geology,Faculty of Sciences Bu-Ali Sina University, Hamedan, Iran

3 Division of Earth Sciences, Kyushu University, Japan

Abstract

A narrow zone of migmatitic rocks forms part of the metamorphic complex associated with the Boroujerd plutonic complex in the north-western part of the Sanandaj-Sirjan zone, Iran. It includes stromatic, dyktionitic, schollen and massive migmatite, metatexites and diatexites. Leucosome (alkali-feldspar granitic and trondhjemitic) and mesosome are well developed, melanosome less so. Detrital zircon cores from one mesosome range in age from ~ 2540 to 210 Ma, with a major sub-population at ~ 250 Ma. The detrital zircon is probably derived from igneous bodies from the Iranian micro-plate (southern Eurasia) and possibly Pan-African and Arabian-Nubian basement no longer exposed. Metamorphism at 170–160 Ma recorded by thin metamorphic zircon rims is similar in age to the adjacent plutonic rocks from the Boroujerd area (172–169 Ma), both occurring in a middle Jurassic continental arc setting.

Keywords


Article Title [Persian]

-

Author [Persian]

  • Ali Asghar Sepahi 2
1
2
3
Ahadnejad, V., Valizadeh, M.V., Deevsalar, R., Rezaei–Kahkhaei, M., 2011. Age and geotectonic position of the Malayer granitoids: Implication for plutonism in the Sanandaj–Sirjan Zone, W Iran. Neues Jahrbuch für Geologie und Paläontologie–Abhandlungen 261: 61–75.##
Ahankoub, M., Jahangiri, A., Asahara, Y., Moayyed, M., 2013. Petrochemical and Sr–Nd isotope investigations of A–type granites in the east of Misho, NW Iran. Arabian Journal of Geosciences 6 (12): 4833–4849.##
Ahmadi Khalaji, A., Esmaeily, D., Valizadeh, M.V., Rahimpour–Bonab, H., 2007. Petrology and geochemistry of the granitoid complex of Boroujerd, Sanandaj–Sirjan Zone, Western Iran. Journal of Asian Earth Sciences 29: 859–877.##
Alavi, M., 1994. Tectonics of the Zagros orogenic belt of Iran: new data and interpretations Tectonophysics 229: 211– 239.
Alavi, M., 2004. Regional stratigraphy of the Zagros fold–thrust belt of Iran and its proforeland evolution. American journal of Science 304: 1–20.##
Alirezaei, S., Hassanzadeh, J., 2012. Geochemistry and zircon geochronology of the Permian A–type Hasanrobat granite, Sanandaj–Sirjan belt: A new record of the Gondwana break–up in Iran. Lithos 151:122–134.##
Athari, S.F., Sepahi, A.A., Moazzen, M., 2007. Petrology of leucocratic granitoids of the northwest of Iran with emphasis on leucocratic I–type granites from the SW Saqqez, Neues Jahrbuch fuer Mineralogie–Abhandlungen 184(2): 169– 179(11).##
Asahara, Y., Mehrabi, B., Chung, S.L., 2011. Geochronological and geochemical constraints on the petrogenesis of high–K granite from the Suffi abad area, Sanandaj–Sirjan Zone, NW Iran Chemie der Erde–Geochemistry 71:363–376.##
Azizi, H., Asahara, Y., Mehrabi, B., Chung, S.L. 2011. Geochronological and geochemical constraints on the petrogenesis of high–K granite from the Suffi abad area, Sanandaj–Sirjan Zone, NW Iran, Chemie der Erde – Geochemistry 71(4): 363–376.##
Azizi, H., Zanjefili–Beiranvand, M., Asahara, Y., 2015. Zircon U–Pb ages and petrogenesis of a tonalite–trondhjemite– granodiorite (TTG) complex in the northern Sanandaj–Sirjan zone, northwest Iran: Evidence for Late Jurassic arc– continent collision Lithos 216–217: 178–195.##
Baharifar, A., 2004. Petrology of metamorphic rocks in the Hamedan area, PhD, Tarbiat Moallem University of Tehran, Iran (in Persian).##
Bea, F., Mazhari, A., Montero, P., Amini, S., Ghalamghash, J., 2011. Zircon dating, Sr and Nd isotopes, and element geochemistry of the Khalifan pluton, NW Iran: evidence for Variscan magmatism in a supposedly Cimmerian LA-ICP-MS zircon U-Pb geochronology on migmatites from the Boroujerd region … 379 superterrane. Journal of Asian Earth Sciences 40: 172–179.##
Black, L.P., Kamo, S.L., Allen, C.M., Aleinikoff, J.N., Davis, D.W., Korsch, R.J., Foudoulis, C., 2003. TEMORA 1: a new zircon standard for Phanerozoic U–Pb geochronology. Chemical Geology, 200: 155–170.##
Chiu, H–Y., Chung, S–L., Zarrinkoub, M.H., Mohammadi, S.S., Khatib, M.M., Iizuka, Y., 2013. Zircon U–Pb age constraints from Iran on the magmatic evolution related to Neotethyan subduction and Zagros orogeny. Lithos 162: 70– 87.##
Esna–Ashari, A., Tiepolo, M., Valizadeh, M.V., Hassanzadeh, J., Sepahi, A.A., 2012. Geochemistry and zircon U–Pb geochronology of Aligoodarz granitoid complex, Sanandaj–Sirjan zone, Iran. Journal of Asian Earth Sciences 43:11– 22.##
Fazlnia, A., Moradian, A., Rezaei, K., Moazzen, M., Alipour, S., 2007. Synchronous activity of anorthositic and S–type granitic magmas in Chah–Dozdan Batholith, Neyriz, Iran: evidence of zircon SHRIMP and monazite CHIME dating. Journal of Sciences, Islamic Republic of Iran 18: 221–237.##
Griffin, W., Powell, W., Pearson, N., O’reilly, S., 2008. GLITTER: data reduction software for laser ablation ICP–MS in the earth sciences. Mineralogical Association of Canada short course series 40: 204–207.##
Hassanzadeh, J., Stockli, D.F., Horton, B.K., Axen, G.J., Stockli, L.D., Grove, M., Schmitt, A.K., Walker, J.D., 2008. U– Pb zircon geochronology of late Neoproterozoic–Early Cambrian granitoids in Iran: implications for paleogeography, magmatism, and exhumation history of Iranian basement. Tectonophysics 451: 71–96.##
Horton, B.K., Hassanzadeh, J., Stockli, D.F., Axen G.J., Gillis, R.J., Guest, B., Amini, A., Fakhari, M.D., Zamanzadeh, S.M., Grove, M., 2008. Detrital zircon provenance of Neoproterozoic to Cenozoic deposits in Iran: Implications for chronostratigraphy and collisional tectonics. Tectonophysics 451: 97–122.##
Hoskin, P.W., Schaltegger, U., 2003. The composition of zircon and igneous and metamorphic petrogenesis. Reviews in mineralogy and geochemistry.53: 27 –62.##
Jamshidi–Badr, M., Collins, A., Masoudi, F., Cox, G.M., Mohajjel, M., 2013. The U–Pb age, geochemistry and tectonic significance of granitoids in the Soursat Complex, Northwest Iran, Turkish Journal of Earth Sciences 22 (1):1–31.##
Mahmoudi, S., Corfu, F., Masoudi, F., Mehrabi, B., Mohajjel, M., 2011. U–Pb dating and emplacement history of granitoid plutons in the northern Sanandaj–Sirjan Zone, Iran. Journal of Asian Earth Sciences 41: 238–249.##
Masoudi, F., 1997. Contact metamorphism and pegmatites development in the region SW of Arak, Iran. PhD, University of Leeds, UK. Masoudi, F., Yardley, B.W.D., Cliff R.A., 2002. Rb–Sr geochronology of pegmatites, plutonic rocks and a hornfels in the region south–west of Arak, Iran. Journal of Sciences, Islamic Republic of Iran 13(3): 249–254.##
Masoudi, F., Yardley, B.W.D., 2005. Magmatic and metamorphic fluids in pegmatite development: Evidence from Borujerd Complex, Iran. Journal of Sciences, Islamic Republic of Iran. 16 (1): 43–53.##
Nutman, A.P., Mohajjel, M., Bennett, V.C., Fergusson, C.L., 2014. Gondwanan Eoarchean–Neoproterozoic ancient crustal material in Iran and Turkey: zircon U–Pb–Hf isotopic evidence.Canadian Journal of Earth Sciences. 51: 272– 285.##
Paces, B.J., Miller, D.J., 1993. Precise UPb Ages of Duluth Complex and Related Mafic Intrusions, Northeastern Minnesota: Geochronological Insights to Physical, Petrogenetic, Paleomagnetic, and Tectonomagmatic Processes Associated With the 1.1 Ga Midcontinent Rift System. Journal of Geophysical Research. 98: 13997–14013.##
Ramezani, J., Tucker, R.D., 2003. The Saghand region, Central Iran: U–Pb geochronology, petrogenesis and implications for Gondwana tectonics. American Journal of Science 303: 622–665.##
Rashidnejad–Omran, N., Emami, M.H., Sabzehei, M., Rastad, E., Bellon, H., 2002. Lithostratigraphy and Paleozoic to Paleocene history of some metamorphic complexes from Muteh area, Sanandaj–Sirjan zone (southern Iran). Comptes Rendus Geosciences. 334 (16): 1185–1191.##
Rubatto, D., 2017. Zircon: The Metamorphic Mineral. Reviews in Mineralogy and Geochemistry 83: 261–295.##
Sepahi, A.A., Whitney, D., Baharifar, A., 2004. Petrogenesis of andalusite–kyanite–sillimanite veins and host rocks, Sanandaj‐Sirjan metamorphic belt, Hamadan, Iran. Journal of Metamorphic Geology 22: 119–134.##
Sepahi, A.A., 2008. Typology and petrogenesis of granitic rocks in the Sanandaj–Sirjan metamorphic belt, Iran: with emphasis on the Alvand plutonic complex. Neues Jahrbuch Fuer Geologie und Paleontologie–Abhandlungen 247(3): 295–312(18).##
Sepahi, A.A., Shahbazi, H., Siebel, W., Ranin, A., 2014. Geochronology of plutonic rocks from the Sanandaj–Sirjan zone, Iran and new zircon andtitanite U–Th–Pb ages for granitoids from the Marivan pluton.Geochronometria 41: 207– 215.##
Sepahi, A.A., Jafari, S.R., Osanai, Y., Shahbazi, H., Moazen, M. 2018. Age, petrologic significance and provenance analysis of the Hamedan low–pressure migmatites; Sanandaj–Sirjan Zone, West Iran, International Geology Review 61(12):1446–1461.##
Shafaii Moghadam, H., Li, X.H., Ling X.X., Stern, R.J., Santos, J.F., Meinhold, G., Ghorbani, G., Shahabi, Sh., 2015.Petrogenesis and tectonic implications of Late Carboniferous A–type granites and gabbronorites in NW Iran: 380 Jafari et al. Geopersia, 10 (2), 2020
eochronological and geochemical constraints. Lithos 212–215: 266–279.##
Shahbazi, H., Siebel, W., Pourmoafee, M., Ghorbani, M., Sepahi, A.A., Shang, C., Abedini, M.V., 2010. Geochemistry and U–Pb zircon geochronology of the Alvand plutonic complex in Sanandaj–Sirjan Zone (Iran): New evidence for Jurassic magmatism. Journal of Asian Earth Sciences 39: 668–683.##
Sheikholeslami, R., Bellon, H., Emami, H., Sabzehei, M., Pique, A., 2003. New structural and 40K–40Ar data for the metamorphic rocks in Neyriz area (Sanandaj–Sirjan Zone, Southern Iran), Their interest for an overview of the Neo– Tethyan domain in the Middle East. Comptes Rendus Geoscience 335: 981–991.##
Valizadeh, M.V., Cantagrel, J.M., 1975. Premières données radiométiques (K–Ar et Rb–Sr) sur les micas du complexe magmatique du Mont Alvand, près Hamadan (Iran occidental). Comptes Rendus Académie des Sciences 281, 1083– 1086.
Yajam, S., Ghalamghash, J., Montero, P., Scarrow, J., Razavi, S., Bea, F. 2015. The spatial and compositional evolution of the Late Jurassic Ghorveh–Dehgolan plutons of the Zagros Orogen, Iran. Geologica acta 13:0025–0043.##
Zare Shooli, M., Tahmasbi, Z., Saki, A., Ahmadi Khalaji, A., 2019. Mineral chemistry, pressure–temperature determination and fluids activities in Boroujerd migmatites using cordierite mineral, Iranian Journal of Crystallography and Mineralogy, 27 (1) :135–150.##
Whitney, D.L., Evans, B.W., 2010. Abbreviations for names of rockforming minerals. Am Mineral 95:185–187##