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The studied area is situated about 70 Km in west of Damghan, and from the structural point of view, the area is part of south of central Alborz zone. Granitoid bodies intruded into late Eocene volcanic and volcanoclastic, mainly composed of monzonite and granite composition. Mineralogically, these rocks contain qua rtz, plagioclase, alkali- feldspare, amphibole, clinopyr oxene, biotite, zircon, apatite, and opaque minerals. Textures of rocks are microgranular and fi eld and textural evidences show that the plutone...