Geochemistry and Petrogenesis of Intrusive Pluton in North of Golpayegan (Central Part of Sanandaj-Sirjan Zone)
- 1 Department of Geology, Faculty of Sciences, North Tehran Branch, Islamic Azad University, Tehran, Iran
- 2 Department of Geology, Faculty of Sciences, North Tehran Branch, Islamic Azad University, Tehran, Iran
- 3 Department of Geology, Eslamshahr Branch, Islamic Azad University, Eslamshahr, Iran
- 4 Department of Geology, Faculty of Sciences, North Tehran Branch, Islamic Azad University, Tehran, Iran
- 5 Department of Geology, Kahnooj Branch, Islamic Azad University, Kerman, Iran
Abstract
Granitoid pluton in the north of Golpayegan is located in10 kmnorth of Golpayegan at SanandajSirjan zone. Dominant rocks of this region include granite, syenite, and gabbro. Granite type is granular with medium to coarse crystals and its mineralogical composition contains alkali feldspar + quartz + plagioclase + biotite + secondary minerals (opaque + sphene + apatite). Granite rocks have calc-alkaline and metaluminous to peraluminous nature, relative enrichment of Rb over Sr, and relative enrichment of LILE over HFSE elements. These granites, which are type I, are derived from the melting of metagreywackes and their tectonic setting is of upper continental crust and post-orogenic setting. Gabbroic type is older than other types of the pluton and is granular with medium to fine crystal. Mineralogical composition of these rocks is plagioclase + pyroxene + amphibole + biotite + secondary minerals (opaque). Based on geochemical characteristics of tholeiitic and metaluminous nature, relative enrichment of Ba and Sr elements over Rb, relative enrichment of LILE elements over HFSE, negative anomaly of Nb, Ba, and Ta, and positive anomaly of Pb are observed. Origin of this type is probably from enriched mantle and in-plane tectonic setting.
- Thiele, O., et al. (1968) Explanatory Text of the Golpaygan Quadrangle Map 1:250,000. Geological Survey of Iran, No. E7, Tehran.
- Ebrahimi, M. (1991) Survey of Geology and Petrology of the Igneous Rocks Golpayegan Mrq-White Springs. Graduate Thesis, Tehran University, Tehran.
- Sharifi, M. (1997) Geology and Petrology of Metamorphic and Igneous Rocks in the North East Golpayegan. Master’s Thesis, University of Isfahan, Isfahan.
- AhmadiKhalaj, A. (1999) Evaluation Petrology and petrofabric of intrusive and metamorphic of Borogerd area. Master’s Thesis, Tehran University, Tehran.
- Stocklin, J. (1968) Structural History and Tectonics of Iran: A Review. American Association of Petroleum Geologists Bulletin, 52, 1229-1258.
- Hassanzadeh, J. (2013) Conference GSI-Geochronology in Geological Survey of Iran.
- Aghanabati, A. (2006) Geology of Iran, Geological Survey and Mineral Exploration. Country Publications, Tehran.
- Moinvaziri, H. And Ahmadi, A. (1996) Petrography and Petrology of Igneous Rocks. Teacher Training University Press, Tehran.
- Ghalamghash, J. (2002) Petrology of the Intrusive Rocks Branch-Oshnoyeh Fit into Their Works. Ph.D. Thesis, Shahid Beheshti University, Tehran.
- Emami, M.H. (2000) Quarterly Journal of Earth Sciences, 12, 203-214.
- Berberian, M. and King, G.C.P. (1981) Towards a Pale Geography and Tectonic Evaluation of Iran. Canadian Journal of Earth Sciences, 18, 210-265.
- Harker, A. (1909) The Natural History of Igneous Rocks. Methuen and Co., London, 344 p.
- Chappell, B.W. and White, A.J.R. (1992) I- and S-Type Granites in Lachlan Fold Belt. Transactions of the Royal Society of Edinburgh: Earth Sciences, 83, 1-26. http://dx.doi.org/10.1017/S0263593300007720
- Rollinson, H. (1993) The Geochemistry of Mafic and Ultramafic Rocks from the Archaen Greenstone Belts of Sierra Leone. Mineralogical Magazine, 47, 267-280. http://dx.doi.org/10.1180/minmag.1983.047.344.01
- Boynton, W.V. (1984) Cosmochemistry of the Rare Earth Elements: Meteorite Studies. In: Henderson, P., Ed., Rare Earth Element Geochemistry, Elsevier, Amsterdam, 63-114.
- Henderson, P. (1984) Rare Earth Element Geochemistry. Elsevier Science Publishers B.V., Amsterdam, 510 p.