TY - JOUR T1 - Geochemistry, Origin and Geodynamic environment Intrusion Zaker - Sorkheh Dizaj in the Southern Limb of the Tarom Subzone, East of Zanjan TT - ژئوشیمی، منشا و محیط ژئودینامیکی توده نفوذی ذاکر - سرخه دیزج، دامنه جنوبی زیر پهنه طارم، شرق زنجان. JF - jsci JO - jsci VL - 13 IS - 4 UR - http://jsci.khu.ac.ir/article-1-1645-en.html Y1 - 2014 SP - 951 EP - 972 KW - Geochemistry KW - monzonite series KW - high-K calc-alkaline to shoshonitic KW - Tarom KW - Zanjan N2 - The granitoid intrusion trending NW-SE, is expose in the East of Zanjan, structurally located in the Alborz - Azarbaijan zone and Tarom sub-zone. Petrographic composition of the intrusion includes a range of monzogranite, quartz-monzonite, quartz-monzodiorite to monzodiorite and in fact shows monzonite series composition. The major rock forming minerals consist of K-feldspar, plagioclase, pyroxene (augite-diopside) and quartz. They show granular, intergranular, microgranular to porphyrytic-microgranular textures. The intrusion has metaliminus high-K calc-alkaline to shoshonitic and I-type affinity. Enclaves of the intrusion have micro-granular mafic and monzodiorite, quartz monzodiorite composition, which are fine-grained than their host rock and have micro-granular porphyritic texture. According to the petrographical and geochemical studies, the magma has originated from partial melting of metasomitised sub-continental lithospheric mantle due to fluids and/or partial melts that originated from subduction edge. According to Harker Diagrams seems that monzodiorite magmas differentiation Leads to monzonite Formation And finally the Crystallization and differentiation are monzogranite. Therefore Crystallization and differentiation are the most important processes controlling rock types in the monzonite series intrusion. Tectonic diagrams indicate a continental margin magmatic arc and syn-to-post collisional intra-arc extensional environment. M3 ER -