Petrography and geochemistry of NW part of Zouzan granitoid, SW of Khaf (SE of Khorasan Razavi Province)

Late Eocene-Early Oligocene Zouzan granitoid bodies are located in northern part of Lut Block and southeast of Khaf in Khorasan Razavi Province and intruded in metamorphic and sedimentary rocks of Precambrian to Eocene. as a result of subduction of Lut Block under Helman Block ,Lut magmatism and Zoozan granitoids have been formed. The granitoid bodies are composed of granodiorite, monzonite, monzodiorite, quartz diorite and also contain microgranular mafic enclaves. Mafic rocks in this area are diorite and gabbro. They are calc-alkaline, metaluminous to peraluminous and oxidized I-type (magnetite series) and, have high contents of alkalis. The granitoids characteristics are similar to those of VAG types which probably evolved in a continental margin tectonic setting. Based on chemistry of plagioclase and hornblende in the granitoids, estimated pressure and temperature range from 2.66 to 3.85 Kb and 676 to 717° C, respectively. Due to intrusion of the Zouzan granitoid bodies, the host rocks were metamorphosed and metasomatized also skarn minerals and iron mineralization occurred in the carbonate rocks.