University of Isfahan Petrological Journal 2228-5210 6 21 2015 03 21 The composition of the major minerals in the Nasrand intrusive rocks and its dikes The composition of the major minerals in the Nasrand intrusive rocks and its dikes 35 54 16202 FA Ali Kananian School of Geology, College of Sciences, University of Tehran, Tehran, Iran Jamshid Ahmadian Fatemeh Sarjoughian کردستان سنندج دانشگاه کردستان Journal Article 2016 06 14 The Nasrand intrusion, in the central part of Uromieh-Dokhtar magmatic belt is mainly composed of granite and granodiorite. The intrusive rocks are hosted by various dikes trending NW-SE. The granites and granodiorites are dominated by plagioclase, K-feldspar, quartz, biotite, amphibole, whereas the dikes are characterized b similar mineralogy in addition to pyroxene. The amphiboles are calcic with (Na+K)A≤0.5 and magnesio -hornblende composition in the granitic rocks with (Na+K)A>0.5 and AlIV3 are magnesio-biotites. The pyroxenes in the studied dikes are clinopyroxene with augite composition. The mineral chemistry of the biotites, amphiboles and pyroxenes indicate that this intrusion is calc-alkaline and have been crystallized in a subduction zone setting. The Nasrand intrusion, in the central part of Uromieh-Dokhtar magmatic belt is mainly composed of granite and granodiorite. The intrusive rocks are hosted by various dikes trending NW-SE. The granites and granodiorites are dominated by plagioclase, K-feldspar, quartz, biotite, amphibole, whereas the dikes are characterized b similar mineralogy in addition to pyroxene. The amphiboles are calcic with (Na+K)A≤0.5 and magnesio -hornblende composition in the granitic rocks with (Na+K)A>0.5 and AlIV3 are magnesio-biotites. The pyroxenes in the studied dikes are clinopyroxene with augite composition. The mineral chemistry of the biotites, amphiboles and pyroxenes indicate that this intrusion is calc-alkaline and have been crystallized in a subduction zone setting. https://ijp.ui.ac.ir/article_16202_e34f7b5bac19bdb188651619bb1deaf5.pdf