STUDYING THE GENESIS OF IGNEOUS ROCKS IN ZARIN-KAMAR REGION (SHAHROOD, NORTHEASTERN IRAN) BY RARE EARTH ELEMENTS
Palavras-chave:plutonic, intergranular, hypidiomorphic, volcanic, porphyritic, asthenosphere, crustal contamination
ResumoZarin-Kamar region is located north east of Shahrood (36o37’-36o42’N, 55007’-55012’E). Plutonic rocks in this area belongs to syenite group and their texture is intergranular hypidiomorphic. Volcanic rocks in the area have porphyritic, amygdale intersertal texture. which quartz is also seen among their cavities and porosities. Total concentration of REEs (ΣREE) in the study igneous rocks varies between 450 and 683 ppm. Diagram of Eu/Eu* versus Sr and Eu/Eu* versus Ba show negative anomalies of Eu. This phenomenon as well as Ba and Sr trends show that plagioclase removal has happened during the magma evolution. These rocks have rock has originated from an enriched mantle source. The rate of Dy/Yb in the igneous rocks of the region varies between 1.32 and 2.62. it shows that it stemmed from a garnet lherzolitic source. The rate of (Tb /Yb )N was between 0.97 to 2.25 showing a garnet source. Also other related figures showed that the samples belonged to OIB (Oceanic Island Basalt). The rate of La/Ta was between 6.6 to 14.01. It also showed that they had a source from asthenosphere. The rate of La/Nb was 0.5 to 0.91. It also shows a less crustal contamination among these samples.
Abdel – rahman , A.M. & F . H. nadear 2002 . characterization of the lebanese jurassic-cretaceeous carbonate stratigraphic sequence : Ageochmemical appraoach . j . Geol . , 37 : 69-91
Abu-Hamatteh, Z, S, H. (2005), Geochemistry and petrogenesis of mafic magmatic rocks of the Jharol Belt, India: geodynamic implication. Journal of Asian Earth Sciences. 25, pp. 557–581.
Boynton, W.V., (1984) Geochemistry of the rare earth elements: meteorite studies. In: Henderson P. (ed.), Rare earth element geochemistry. Elsevier, 63-114.
Bradshaw, T. K., and Smith E. I. 1994. Polygenetic Qua-ternary volcanism at Crater Flat, Nevada. J. Volcanol . Geotherm . Res. 63:165–182.
Castillo, P.R., Rigby, S.J., and Solidum, R.U., (2006). "Origin of high field strength element enrichment in volcanic arcs: geochemical evidence from the Sulu Arc, Southern Philippines". Lithos, 1552, 44p.
Charlie Beard and Vincent van Hinsberg and John Stix and Max Wilke ( 2017), Aegirine-melt element partitioning and implications for the formation of
Chen, W. and R.J. Arculus, 1995. Geochemical and isotopic characteristics of loer crustal xenoliths, San Francisco volcanic field, Arizona, USA.Lithos, 36: 203-225.
Classic A/CNK vs A/NK plot of Shand (1943) discriminating metaluminous, peraluminous and peralkaline compositions.
Eby, G.N., (1990): The A-type granitoids: A review of their occurrences, chemical characteristics and speculations on their petrogenesis. Lithos, V. 26, pp. 115-134.
Fitton JG, James D, Leeman WP (1991). Basic magmatism associated with Late Cenozoic extension in the Western United States: compositional variations in space and time. J Geophys Res 96: 13693–13712.
Kearey P, Vine F.J., (1990), Global Tectonics. London, UK: Blackwell.
Khodami, M., Kamali Shervedani, A (2018) Mineralogical and geochemical characteristics of the Chah-Shur clay deposit, Southeast of Isfahan, Iran, Iranian Journal of Earth Sciences, 10(2): 135-141.
Leat, P.T., Jackson, S.E., Thorpe, R.S., Stillman, C.J., 1986. Geochemistry of bimodal basalt-subalkaline/peralkaline-rhyolite provinces within the southern British Caledonides. J. Geol. Soc. London 143, 259–276.
Leat, P.T., Thompson, R.N., Morrison, M.A., Hendry, G.L., Dickin , A.P, (1988). Compositionally-diverse Miocene-recent rift related magmatism in northwest Colorado: partial melting, and mixing of mafic magmas from 3 different asthenospheric and lithospheric mantle sources. J Petrol Special Volume: 351–377.
Leat, P.T., Thompson, R.N., Morrison, M.A., Hendry, G.L., Dickin , A.P., (1988). Compositionally-diverse Miocene-recent rift related magmatism in northwest Colorado: partial melting, and mixing of mafic magmas from 3 different asthenospheric and lithospheric mantle sources. J Petrol Special Volume: 351–377.
LI, Xianhua., Zhou, Hanwen,. Liu, Ying., Lee, Chi-Yu., Sun, Min., Chen, Chenhong., (2000),Shoshonitic intrusive suite in SE Guangxi: Petrology and geochemistry, Chinese Science Bulletin Vol. 45 No. 7
Menzies, M.A. And R. Kyle, (1990), Continental Valcanism: A Crust-Mantle Probe. In: Continental Mantle, Oxford, Menzies, M.A.(EDS). Oxford ScIence Publishers, London, PP:157-77.
Middlemost, E. A. K. (1985). Naming materials in the magma / igneous rock system. Earth-Sciences Reviews 37, 215–224.
Middlemost,E.A.K.,(1994) , Naming material in the magma igneous rock system Earth Sci ,Re.,37 (3-4) 215 -224.
Mobashergarmi, M., Zaraisahamia, R., Aghazadeh, M., Ahmadikhalaji, A., Ahmadzadeh, GH (2018) Mineral chemistry and thermobarometry of Eocene alkaline volcanic rocks in SW Germi, NW Iran, Iranian Journal of Earth Sciences 10 (1) 39-51.
Mojgan S (2008), Petrology, geochemistry and mineral chemistry of extrusive alkalic rocks of the Southern Caspian Sea ophiolite, Northern Alborz, Iran: evidence of alkaline magmatism in Southern Eurasia. J Appl Sci 8: 2202–2216
Nazemi, E.(2017) Petrology and geochemistry aegirine syenits of Zarrin kamar area, NE of Shahrood. PhD thesis, Department of Geology, Islamic Azad University of Tehran , Tehran, Iran.
Nazemi,E. and Arian, M.A. and Jafarian, A. and Porkermani, M. , Petrology and geochemistry of igneous rocks in Zarin Kamar area, NE of Shahrood, Iran. https://doi.org/10.4236/ojg.2017.73024
Nepheline syenite REE deposits, Geophysical Research Abstracts, Vol. 19, EGU2017-10291, 2017.
Novruzov, N., Valiyev, A., Bayramov, A ., Mammadov, S., Ibrahimov, J., Ebdulrehimli, A (2019) Mineral composition and paragenesis of altered and mineralized zones in the Gadir low sulfidation epithermal deposit (Lesser Caucasus, Azerbaijan), Iranian Journal of Earth Sciences, 11(1): 14-29.
Pearce, J.A., 2008. Geochemical fingerprinting of oceanic basalts with applications to ophiolite classification and the search for Archean oceanic crust. Lithos 100, 14–48.
Pearce, J.A., Peate, D.W., 1995. Tectonic implications of the composition of volcanic arc magmas. Annual Review of Earth and Planetary Sciences 23, 251–285.
Rollinson ,H.R.,(1993),Using geochemiecal data : evaluation , presentation , interpretation . Longman Group , Uk Ist edition .352p.
Sayıt K, Goncuoglu, M.C., (2009), Geochemistry of mafic rocks of the Karakaya complex, Turkey: evidence for plume-involvement in the Palaeotethyan extensional regime during the Middle and Late Triassic. J Earth Sci 98: 367–385.
Schiano, P., Monzier, M., Eissen, J.P., Martin, H., Koga, K.T., 2010. Simple mixing as the major control of the evolution of volcanic suites in the Ecuadorian Andes. Contributions to Mineralogy and Petrology 160, 297–312.
Thompson, R.N., Morrison , M.A., (1988). Asthenospheric and lower lithospheric mantle contributions to continental extension magmatism: an example from the British Tertiary Province. J Chem Geol 68: 1–15.
Wilson, M. (1989), Igneous petrogenesis a global tectonic approach, Unwin Hyman Ltd . , London, 466p.
Wood, D.A., Joron, J.L., Treuil, M., Norry, M., Tarney, J., (1979a). Elemental and Sr isotope variations in basic lavas from Iceland and the surrounding ocean floor. Contributions to Mineralogy and Petrology 70, 3219-339.
Yazdi, A., Ashja-Ardalan, A., Emami, M.H., Dabiri, R., & Foudazi, M. (2017). Chemistry of Minerals and Geothermobarometry of Volcanic Rocks in the Region Located in Southeast of Bam, Kerman Province. Open Journal of Geology, 7, 1644-1653