Petrogenesis and geodynamics of the Early Miocene Kashan granitoids in the central Urumieh-Dokhtar Magmatic Arc, Iran

(29-47), and Ni (4.56 - 22.13) values. Such signatures are consistent with partial melting of the thickened lower crust. Based on the regional geology and previous work, we propose a two-stage geodynamic model. The diorites formed during the initial Arabia-Eurasia collision related to the final breakoff of the Neo-Tethys slab, whereas the adakitic rocks were generated during the main collisional stage.