Study of geochemistry, tectonomagmatic environment and petrography of the Astaneh granitoid body (South-West of Arak)
Subject Areas :
Abbas Asgari
1
(
استادیار گروه زمین شناسی دانشگاه آزاد اسلامی واحد محلات
)
Keywords: Contamination, Sanandaj-Sirjan Zone (SSZ), intrusion igneous, Astaneh, enclave, volcanic arc granite, ,
Abstract :
Astaneh granitoid body with middle cretaceous age is located in south west of Arak and Sanandaj - Sirjanstructural zone. This body is composed quartz diorite, granodiorite, tonalite and monzo granite dikes andintruded into regional metamorphic rocks (S.S.B). Correlated enrichment in LILEs compare to HFSEs and highYbLa,( 5)YbThreveal volcanic arc granites and existence enclave (Andalusite) and ratio of0 710448687( )I .SrSrshow high crustal contamination the partial of mantle wedge, subducted oceanic crust bylower continental crust, according probably this magmatism related to volcanic arc environment and is the resultof the subduction of Neo-Tethys oceanic plate below the Iranian continental crust.
