Petrology and geochemistry of quartz-monzonite body in the Tarom Subzone North-East of Zanjan


1 Department of Geology, Faculty of Sciences, Tarbiat Modares University, Tehran, Iran

2 Department of Geology, Faculty of Sciences, Payame Noor University, 19395-3697 Tehran, I. R. of Iran

3 آذربایجان شرقی، شبستر، دانشگاه پیام نور

4 Department of Geology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran


The Tarom Olia quartz monzonitic intrusive is one of the plutons cropped out in Alborz-Azarbaijan zone which is elongated in NW-SE direction. The pluton, lithologically comprises monzodiorite, monzonite, quartz monzonite and monzogranite. Field and petrological studies as well as geochemical considerations revealed that this pluton crystallized from an I-type metaluminous magma with shoshonitic affinity. The magma has originated by melting of a metasomatized lithospheric mantle then affected by processes by which modified composition of the primary magma to produce the intermediate and felsic rocks.