Document Type : Original Research Paper


1 Ph.D. Student, Department of Geology, Tarbiat Modares University, Tehran, Iran

2 Associate Professor, Department of Geology, Tarbiat Modares University, Tehran, Iran

3 Ph.D., Geological Survey of Iran (GSI), Tehran, Iran


Boneh shurow metamorphic complex is located in the east of Saghand area, Central Iran. This complex consists of quartz-feldspatic gneiss (mafic minerals < 5%), biotite-amphibole gneisses, metabasics rocks, schists, subordinate dolomitic marble and quartzite interlayers and mafic and felsic magmatic intrusions that they have been retrogressed to lower amphibolite facies. In MORB-normalized plots, the metabasic samples can be classified into two groups: first group does not display Nb-Ta anomaly and second group displays negative Nb-Ta anomaly. Whole rock geochemistry and Sr– Nd isotopic composition of metabasic unites suggest derivation from two different mantlic sources in the back arc setting. A source enriched in Ti, such as plume tail, and an old enriched mantle that has been affected by subduction, can be involved in generation of the first and second group, respectively


Main Subjects

Bagci, U., Alpaslan, M., Frei, R., Alikurti, M. and Temel, A., 2011- Different Degrees of Partial Melting of the Enriched Mantle Source for Plio-Quaternary Basic Volcanism, Toprakkale (Osmaniye) Region, Southern Turkey, Turkish Journal of Earth Sciences (Turkish J. Earth Sci.), 20, 115- 135.
Baker, B. H., Goles, G. G., Leeman, W. P. and Lindstrom, M. M., 1977- Geochemistry and petrogenesis of a basalt-benmoreite-trachyte suite from the southern part of the Gregory Rift, Kenya .Contrib. Mineral. Petrol. 64, 303- 332.
Balaghi Einalou , M., Sadeghian, M., Zhai, M., Ghasemi, H. and Mohajjel, M., 2014- Zircon U–Pb ages, Hf isotopes and geochemistry of the schists, gneisses and granites in Delbar Metamorphic-Igneous Complex, SE of Shahrood (Iran): Implications for Neoproterozoic geodynamic evolutions of Central Iran, Journal of Asian Earth Sciences, 92 , 92- 124.
Barth, M. G., McDonough, W. F. and Rudnick, R. L., 2000- Tracking the budget of Nb and Ta in the continental crust. Chemical Geology,165, 197- 213.
Condieh, K. C., 2003- Incompatible element ratios in oceanic basalts and komatiites: tracking deep mantle sources and continental growth rates with time, Gheochem, Geophys, Geosyst, 4, 1, 1- 28.
DePaolo, D. J., 1981-Trace element and isotopic effects of combined wallrock assimilation and fractional crystallization. Earth Planet Sci Lett, 53,189- 202.
Depaolo, D. J., 1988- Neodymium Isotope Geochemistry. Springer Verlag, Berlin, 187p.
Dickin, A. P., 1995- Radiogenic Isotope Geology. Cambridge University Press, Cambridge,452p.
Faure, G., 2001- Origin of Igneous Rocks: The Isotopic Evidence. Springer Verlag, Berlin,496p.
Floyd, P. and Winchester, J., 1975- Magma type and tectonic setting discrimination using immobile elements. Earth Planet Sci Lett, 27, 211- 218.
Floyd, P. and Winchester, J., 1978- Identifcation and discrimination of altered and metamorphosed volcanic rocks using immobile elements. Chem Geol, 21, 291- 306.
Foley, S., 1992- Vein-plus-wall-rock melting mechanisms in the lithosphere and the origin of potassic alkaline magmas, Lithos, 28, 435- 453.
Gee, D. G. and Pease, V., 2004- The Neoproterozoic Timanide Orogen of Eastern Baltica, Geological Society of London, N30, 255p.
Gourabjeiri-Pour, A., Heuss-Aßbichler, S., Mobasheri,M. and Mahdavi, P., 2016- Geochemistry, Mineral Chemistry and Thermobarometry of Boneh-Shorou Amphibolites in Gelmandeh Massive (Saghand-Central Iran), Open Journal of Geology, 6, 786- 800.
Griffin, W. L., Oreilly, S. Y. and Ryan, C. G., 1999- The composition and origin of subcontinental lithospheric mantle, Mantle Petrology: Field Observations and High Pressure Experimentation: A Tribute to Francis R. (Joe) Boyd , The Geochemical Society, Special Publication Bagci, 2011, Different Degrees of Partial Melting of the Enriched Mantle Source for -Plio-Quaternary Basic Volcanism,Toprakkale (Osmaniye) Region, Southern Turkey, Turkish Journal of Earth Sciences (Turkish J. Earth Sci.), 20, 115- 135.
Haghipour, A., 1977- Geological map of the Posht-e-Badam area, Scale 1/100000, Geological Survey of Iran.
Haghipour, A. and Pelissier, G., 1977- Geological map of the Biabanak- Bafq area, Scale 1/500000, Geological Survey of Iran.
Hanson, G. N., 1980- Rare earth elements in petrogenetic studies of igneous systems, Ann. Rev. Earth Planet. Sci, 8, 371- 406.
Hassanzadeh, J., Stockli, D. F., Horton, B. K., Axen, G. J., Stockli, L. D., Grove, M., Schmitt, A. K. and 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.
Honarmand, M., Xiao, W., Nabatian,G., Blades, M., Santos, M. and  Collins, A., 2017- Ao, S., Zircon U-Pb-Hf isotopes, bulk-rock geochemistry and Sr-Nd-Pb isotopes from Late Neoproterozoic basement in the Mahneshan area, NW Iran: Implications for Ediacaran active continental margin along the northern Gondwana and constraints on the Late Oligocene crustal anatexis, Gondwana research.
Horton, B. K., Hassanzadeh, J., Stockli, D. F., Axen, G. J., Gillis, R. J., Guest, B., Amini, A. H., Fakhari, M., Zamanzadeh, S. M. and Grove, M., 2008- Detrital zircon provenance of Neoproterozoic to Cenozoic deposits in Iran: Implications for chronostratigraphy and collisional tectonics. Tectonophysics,  451, 97- 122.
Kozlovsky, A. M., Yarmolyuk , V. V., Savatenkov , V. M. and Kovach, V. P., 2006- Sources of Basaltoid Magmas in Rift Settings of an Active Continental Margin: Example from the Bimodal Association of the Noen and Tost Ranges of the Late Paleozoic Gobi–Tien Shan Rift Zone, Southern Mongolia, Petrology,14,337- 360.
Leake, B. E., 1964- The Chemical Distinction Between Ortho- and Para-amphibolites, Journal of Petrology, 5, 238- 254.
Maleki, L., Rashidnejad Omran, N., Hooshmandzadeh, A., Büttner, B. and Cottel, J., 2018- Retrogressed eclogites and eclogitic metagabbros in the Boneh Shurow Complex, Central Iran, EGU General Assembly, Geophysical Research Abstracts,v. 20.
Manikyamba, C., 2015- Geochemistry and petrogenesis of Rajahmundry trap basalts of Krishna-Godavari Basin, India, Geoscience Frontiers, 6, 437- 451.
Niu, Y. and Ohara, M., 2009- MORB mantle hosts the missing Eu (Sr, Nb, Ta and Ti) in the continental crust:New perspectives on crustal growth, crust–mantle differentiation and chemical structure of oceanic upper mantle, Lithos, 112, 1- 17.
Pearce, J. A. and Parkinson, I. J., 1993- Trace element models for mantle melting: application to volcanic arc petrogenesis. Geological Society of London, Special Publications, 76(1), 373- 403.
Pearce, J. A., 1996- A User’s Guide to Basalt Discrimination Diagrams, in Trace Element geochemistry of Volcanic Rocks: Applications for Massive Sulphide Exploration: Geol. Assoc. Can. Short Course Notes, v.12.
Pearce, J., 1983- Role of the sub-continental lithosphere in magma genesis at active continental margin, in: Hawkesworth, C. J., Norry, M. J., eds., Continental basalts and mantle xenoliths: Shiva Publishing Ltd, Nantwich, 272p.
Ragland, P. C., 1989- Basic Analytical Petrology. Oxford University Press, New York, 369p.
Ramezani, J., 1997- Regional geology, geochronology and geochemistry of the igneous and metamorphic rock suites of the Saghand area, central Iran: Ph.D. thesis, Washington University, St. Louis, Missouri, 416p.
Richards, J. P., Spell, T., Rameh, E.,  Razique, A. and Fletcher, T., 2012- High Sr/Y Magmas Reflect Arc Maturity,High
Robinson, J. A. C., Wood, B. J. and Blundy, J. D., 1998- The beginning of melting of fertile and depleted peridotite at 1.5 GPa. Earth and Planetary Science Letters 155, 97- 111.
Rollinson, H. R., 1993- Using Geochemical Data: Evaluation, Presentation, Interpretation. John Wiley, Chichester, 352p.
Rudnick, R. L., 1992- Restites, Eu anomalies, and the lower continental crust, Geochemica et cosmochemica,  Vol. 56, 963- 970.
Saki, A., 2010- Proto-Tethyan remnants in northwest Iran: Geochemistry of the gneisses and metapelitic rocks.Gondwana Research,17,704- 714.
Sarjoughian, F., Kananian, A., Hashke, M. and Ahmadian, J., 2012- Geochemical signature of Eocene Kuh-e Dom shoshonitic dikes in NE Ardestan, Central Iran: implications for melt evolution and tectonic setting ,  Journal of Geosciences, 57, 241- 264.
Schandl, E. S. and Gorton, M. P., 2002- Application of high field strength elements to discriminate tectonic settings in VMS environments. Economic Geology,97, 629- 642.
Schmid, R., Fettes, D., Harte, B., Davis, E. and Desmons, J., 2007- How to name a metamorphic rock, IUGS Subcommission on the Systematics of Metamorphic Rocks (SCMR),
Shafaii Moghadam, H., Khademi, M., Hu, Z., Stern, R. J., Santos, J. F. and Wu, Y., 2015- Cadomian (Ediacaran–Cambrian) arc magmatism in the ChahJam–Biarjmand metamorphic complex (Iran): magmatism along the northern active margin of Gondwana. Gondwana Research, 27, 439- 452.
Shervais, J. W., 1982- Ti-V plots and the petrogenesis of modern and ophiolitic lavas. Journal of  Earth and Planetary Science Letters, 59(1), 101- 118.
Srivastava, R. K. and Singh, R. K., 2004- Trace element geochemistry and genesis of Precambrian sub-alkaline mafc dikes from the central Indian craton: evidence for mantle metasomatism. Journal of Asian Earth Sciences, 23, 373- 389.
Sun, S. S. and McDonough, W. F., 1989- Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In: Saunders, A.D., Norry, M.J. (Eds.), Magmatism in Ocean Basins. Geological Society of London Special Publication 42, 313- 345.
Taylor, S. R. and McLennan, S. M., 1985- The Continental Crust: Its Composition and Evolution. Oxford. Blackwell Scientific publications, London, 312p.
Weaver, B. L., 1991- The origin of ocean island basalt end- member composition: trace element and isotopic constraints. Earth Plant. Sci. Lett, 104, 381- 397.
Wilson, M., 2007- Igneous petrogenesis, A global tectonic approach, Springer, 466p.
Winchester, J. and Floyd, P., 1976- Geochemical magma type discrimination; application to altered and metamorphosed basic igneous rocks. Earth Planet Sci Lett, 28, 459- 469.
Winchester, J. and Floyd, P.,1977- Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chem Geol, 20, 325- 343.
Wood, D., 1980- The application of a Th–Hf–Ta diagram to problems of tectonomagmatic classifcation and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary volcanic province. Earth Planet Sci Lett, 50, 11- 30.
Wood, D., Joron, J. and treuil, M., 1979- A re-appraisal of the use of trace elements to classify and discriminate between magma series erupted in different tectonic settings. Earth Planet Sci Lett, 45, 326-336.
Xia, L. Q., 2014- The geochemical criteria to distinguish continental basalts from arc related ones. Earth-Science Reviews, 139, 195- 212.