پتروگرافی وپترولوژی توده گرانیتوئیدی شمال و شمال شرق ازنا

The Azna Granitoid intrusion is located at the North and North west of Azna within the sanandaj-sirjan structural zone.the intrusion is made of Granitoide-monzograniteand tonalite. Geochemical and petrological investigations show the consanguinity between different rock of this intrusion rocks are calc-alkaline and peraluminous.characteristies such as existence aluminosilicate

s (andalusite-sillimanite-kyanite)and garnet peraluminous nature of the rocks surmicaceous enclaves and more than ۱% normative corundum suggest the s-type origin for this intrusion. Geochemical investigationes and fild evidence support the (CCG) tectonic setting for these rocks. Thermal effecct of this intrusion on the upper jurassic slatesand phyllites resulted in formation of albite-epidote-hornfelse metamorphic rocks.on the basis of stratigraphical and field evidence the emplacement age of this intrusoin is upper- cretaceous (laramid orogeny) .