Petrology and Tectonic Setting of Sahand Tertiary Volcanic Rocks (South of Tabriz)

Authors

1 Assistant Professor, Department of Geology, Faculty of Sciences, Islamic Azad University, Shabestar Branch,Shabestar

2 Professor, Department of Geology, Faculty of Sciences, Tabriz University, Tabriz

Abstract

Abstract
In south of Tabriz, the Tertiary volcanic rocks have exposed in Oligocene-Miocene sedimentary deposits. The Sahand volcano is located in the NW of Iran. The volcano is stratovolcano and is dominated by pyroclastic materials and lava flows in the Miocene-Quaternary. The last eruptions included subvolcanic and volcanic domes with dacitic to rhyolitic composition. These rocks have petrological features including sieve texture and zoning in plagioclases. Common features in the young subvolcanic and volcanic rocks of the Sahand are abundance of plagioclase and amphibole, enrichment of Ba, Rb and Sr and negative Nb and Y anomalies in primitive mantle normalized multi element diagrams and enrichment of LREE relative to HREE in chondrite-normalized REE patterns. These characteristics and the location of the rocks studied in the Y-Sr/Y diagram implying adakitic composition for these rocks. Adakitic rocks of the Sahand are high SiO2 Adakitic rocks. These rocks have been derived from partial melts of garnet-bearing crustal sources (thickened lower continental crust or oceanic crust) and underwent magmatic evolution during their ascent. The formation of  studied rocks have been related to the Arabian-Eurasia collision zone.

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References

References
- Berberian F., (1977)."Against the rigidity of the Lut Bolck", Iran, Geol. Miner. Res. Organ, Rep. No .40
- Borg L.E., Clynne M.A., Bullen T.D., (1997) "The variable role of slabderived fluid sin the generation of a suite primitive cal-alkaline lavas from the Southernmost Cascades, California", Con Min. 35 425-452.
- Burnham C.W., (1979) "Magmas and hydrothermal ore deposits", (2nd edn.). pp. 71-136 (ed. H.L.Barnes),Wiley Interscence, New York.
- Chiaradia M., Muntener O., Beate B., Fontignie D., (2009). "Adakite-like volcanism of Ecuador: lower crust magmatic evolution and recycling", Contributions Mineralogy and Petrology, v. 158, p.563-588.
- Cox K.G.B., Bell J.D., Pankhurst R.J., (1979)."The interpretation of igneous rocks", George, Allen and Unwin, London.
- Defant M.J., Drummond M.S., (1991). "Drivation of some modern arc magmas by melting of young subducted lithosphere", Nature, v. 347, p. 662 - 665.
- Devin G.D., Sigurdsson H., J. Volc. (1995)  "Geotherm", Res, 69-35.
- Edwards C., Menzies M., Thirwall M., (1991).  "Evidence from Muriah, Indonesia, for the interplay of supra subduction zone and intraplate processes in the genesis of potassic alkaline magmas", Petrology. V. 32,p.555-592.
- Fang H., Yong Sheng H., (2010). "Partial melting of the dry mafic continental crust: Implications for petrologenesis of C-type adakites.", Chinese Science Bulletine, no.22,v.55,p.2428- 2439.
- Fisher R.V., (1979)"Models for pyroclastic surges and pyroclastic flows", Jornal of GeothermalReservoirs,6, 305-318.
- Foden Jd., (1983)"The petrology of the calcalkaline lavas of Rindjani volcano, East Sunda Arc: a model for island arc petrogenesis",  J. Petrol24. 98-130.
- Gertisser R, Keller J., (2003).  "Trace element and Sr, Nd, Pb and Oisotope variations in medium-K and high- K volcanic rocks from Merapi volcano, Central Java, Indonesia: Evidence for the involvement of subducted sediments in Sunda Arc magma genesis.", J. Petrol. 44, 457-489.
- Green N.L., Harry D., (1999) "On the relationship between subducted slab age arc basalt petrogenesis, Cascadia Subduction System, North America", Earth and Planetary Science Letters. 171 :367-381.
- Harangi S., Lenkey L., (2007). "Genesis of the Neogene to Qaternary volcanism in the Carpathian –Parnonian region: Role of subduction, extension and mantle plume", in beccaluva, L.a, Bianchini , G. and Wilson M., eds. Cenozoic volcanism in the Mediterranean Area: Geological society ofAmerica Specical Paper 418 : Pp.67-92.
- Harric C., (1983)  "The petrology of lavas and associated plutonic inclusion Ascension Island", Journal of Petrolrgy 24, 424-470.
- Irvine T.N., Baragar W.R.A., (1971) "A guide to the chemical classification of the common volcanic rocks", Canadian J Earth Science, v. 8 p, 523-548.
- Jahagiri A., (2007). "Post-collisional Miocene adakitic volcanism in NW Iran: Geochemical and geodynamic implications", Journal of Asian Erth Science, V.30, p.433-447.
- Khatib M.M, Zarinkoub M.H., (2009 ). "Morpho – tectonics and Mechanism of emplacement of the andesitic ring in Givshad", east of Iran. EGU2009 meeting.
- Kretz, R. (1983) "Symbols for rock forming minerals". Am. Mineral., 68, 277 - 279.
- Kuscu G.G., Geneli F., (2008)"Review of postcollisional volcanism in the Central Anatolian Volcanic Province (Turkey), with special reference to the Tepekoy Volcanic Province", Int J Earth Sci,.
- Le Maitre R.W. (ed.) (1989) "A Classification of Igneous Rocks and Glossary of Terms", Blackwell. Oxfod.
- Martin H., Smithies R.H., Rapp R., Moyen J.F., Champion D., (2005)"An overview of adakite, tonalite trondhjemite-granodiorite (TTG), and sanukitoid: relationships and some implications for crustal evolution". Lithos, v.29:Issues 1-2, p. 1-24.
- Middlemost E. A. K., (1985)"Magmas and magmatic rocks", Longman, London.
- Mohamed F.H., Moghazi A.M., Hassanen M.A., (2000)"Geochemistry, petrogenesis and tectonic setting of late Neoprpterozoic Dokhan-type volcanic rocks in the Fatira area, eastern Egypt", International Jornal of EarthScience, 88 : 764-777.
- Muller D., Groves D.I., (1993)"Direct and indirect associations between potassic igneous rocks, shoshonites and gold-copper deposite", OreGeology Review,. v.8.p.383-406.
- Nicholson K. N., Black P. M., Hoskin P. W. O., Smith I. E. M., (2004) "Silicic volcanism and back – arc extension related to migration of the late Cenozoic Australian – Pacific plate boundrary", Journal of volcano andGeotherm. Res. 131. 295 – 306.
- Pettijohn F.J., Potter P.E., Siever R., (1972)"Sand and sandstones", Springer- Verlag, New York.
- Price RC, et al. (1999) "Petrogenesis of High-K Arc Magmas: Evidence from Egmont Volcano, North Island, New Zealand.",. Journal ofPetrology, Vol. 40, N. l , P. 167-197.
- Qin J., Lai S., Li Y., (2007)"Post-collisional adakitic biotite plgiogranites from Guangtoushan pluton (Mianxian, central China): Petrogenesis and tectonic implication. Earth and EnvironmentalScience",. No.3,v.1,p.299-303.
- Raymond L.A., (2002) "The study of Igneous، Sedimentary and Metamorphic Rocks", McGraw Hill, p. 720.
- Reichow M., Saunders A.D., White R.V., Mukhamedov  A.I., Medvedev A.Ya., (2008)"Geochemistry and petrogenesis of basalts from the West Siberian Basin: an extension of the Permo Triassic Siberian Traps, Russia", Lithos, v.79,p.425-452.
- Reubi O., Nicholls I.A., (2004) "Magmatic evolution at Batur volcanic field, Bali, Indonesia: Petrological evidence for polybaric fractional crystallization and implications for calderaforming eruptions",. Journal ofVolcaologyand Geothermal Research 138,345-369.
- Richards J.P., (2006)"The Late Miocene-Quaternary Antofalla volcanic complex, southern Puna, NW Argentina: Protracted history, diverse Petrology, and economic potential",. Journal ofVolcanology andGeothermal Research 152, 197- 239.
- Richards J.P., Kerrich R., (2007)"Special Paper: Adakite-Like Rokes: Their Diverse Origins and Questionable Role in Metallogenesis",. Economic Geology, no.4,v.102,p.537-576.
- Rollinson H., (1993)"Using geochemical data: evaluation, presentation, interpretation", Longman Scientific andTechnical.,. 352P.
- Rutherford M.J., Hill P. E., J., (1993)"Geophy", Res., 98, 19667.
- Schmid R., (1981) "Descriptive nomenclature and classification of pyroclastic deposits and fragments", recommendations of the IUGS subcommission on the systematics of igneous rocks. Geology. 9 :41-3.
- Shand SJ. (1943) "Eruptive Rocks. Their Genesis, Composition, Classification, and Their Relation to Ore-Deposits with a Chapter on Meteorite.". New York: John Wiley & Sons.
39- Shelly D., (1993)"Microscopic stady of Igneous and Metamorphic rocks", Champan & Hall, London, , 184 .
- Stocklin J., (1974) "Evolution of the continental margins bounding a former Southern Tethys", In Geol. Cont. Margins, Springer, PP. 873- 887, BIBL. 2p, 5 Illus. U.N. Geol Sury. Inst.
- Sun S.S., McDonough W.F., (1989) "A chemical and isotopic systematics of oceanic basalts: Implication for mantle composition and processes", Geological Society SpecialPublication,. v.42,p.313-345.
- Tirrul R., Bell L.R., Griffis R.J., Camp V.E., (1983)  "The Sistan suture zone of eastern Iran", G.S.A.Bulletin, vol.84, pp. 143-410.
- Tsuchiyama A., (1985) "Dissolution kinetics of plagioclase in the melt of the system diopside-albite- anortithite and origin of dusty plagioclase in andesites", Contrib. Mineral. Petrol., 89 :1-16.
- Turner S, Foden JD., "U-Th-Ra disequilibria, Sr-Nd-Pb isotope and trace element variations in Sunda Arc lavas: predominance of a subducted sediment.", (2001). Contrib, Mineral. Petrol. 142, 43-57.
- Varol E., Temel A., Gourgaud A., Bellon H., (1968) "Early Miocene adakite- like volcanism in the Balkuyumcu region, central Anatolia, Turkey", (2007). Petrology and geochemistry: Journal of Asian EarthSciences, v.30, p.613 628.45- Vol.52, No.6.
- Wilson M, Tankut A, Gulec N., (1997)  "Tertiary volcanism of the Galatia province, north-west Central Anatolia,Turket", Lithos 42, 105- 121.
- Wilson M., (1989) "Igneous Petrogenesis", Unwin Hyman London.,466p.
- Wood D.A., (1980) "The application of a Th-Hf-Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary volcanic province", Earth andPlanetary Science Letters, vol.50, pp. 11- 30.
- Zanetti A., Mazzucchelli M., Rivalenti G., Vannuci R., (1999) "The Fhnero phlogopite-peridotite massif: an example of subduction-related metasomatism", Contributions to Mineralogy andPetrology, 134 107-122.
Journal of Tectonics
Volume 1, Issue 3
October 2015
Pages 57-72

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