سنگ‌زایی و ژئوشیمی توده‌ی گرانیتی نوع A میشو

East misho granitoid intrusion body, a part of Alborz-Azarbaijan zone, is located about 60 Km north west of Tabriz, NW Iran. This pluton with an area of about 50 km2 has cut percamberian unmetamorpic sedimentary rocks and, is covered with Permian sedimentary rocks with igneous nonconformity. Litological composition of the studied pluton displays a range of alkali granite, monzogranite and syenogranite. The dominant texture of the samples are granular, inequidimentional granular, pertite and myrmekite. Major minerals include quartz, K-feldspar and plagioclase, and minor and accessory minerals are biotite, amphibole, pyroxene, apatite, titanite and zircon. The Pluton composition is alkali-granite and displays metaluminous to peraluminous nature. Negetive Ba, Nb, Ti, Sr and Eu anomalies and enrichment in LILEs especially in Rb and Th suggests the crustal origin of these rocks. East Misho granitoid complex is continental margin and A- type post collision granitoides that, regarding negetive Nb anomalies belong to A2.