Petrogenesis and geodynamic location of Shotori range volcanism

Abstract:
      Eocene volcanic rocks of Shotori range in eastern region of Tabas city are a small part of Lut volcanism and incorporate a continuous spectrum of basalt to Rhyolite.
   Pyroclastic rocks that their volume is less are often under contact of volcanic rocks. Basalts are the first sign of volcanism and continued with younger differentiated components.
   According to field investigations, study of rare elements behavior and spider diagrams, these rocks belong to high potassic calcoalkaline series that occur in subduction zone of continental margins.
   The main process is probably subduction of oceanic plate between Hyrmand and Lut blocks to west in upper cretaceous and forming ophiolitic melange in eastern part of Iran. the volcanic rocks have been evidences such as crystallization of basaltic magma with little assimilation in source in relation with granitoitic plutons.