Abstarct: In Ahmadabad region (located in 175 Km southeast of Shahrood), a numerous adakitic domes croped out, which intruded into the Paleocene - Eocene volcanosedimentary rocks. These igneous bodies manifested in the form of dyke, dome and or relatively deep igneous plutons. According to textures, and structure and their emplacement mechanism, these igneous rocks can be divided into two category with shallow emplacement depth and relatively more deeper emplacement depth. First category are subvolcanic and include domes with trachyandesite-trachydacite composition which have porphyry, microlitic porphyry and flow textures. Their major minerals are pyroxene (augite), plagioclase, hornblende green and oxy- hornblende. With respect to low HREE and high LREE along with other characteristics such as silica content (58.91- 63.41(in wt %)), Yb > 1.8 ppm, Y > 18 ppm, these rocks can be classified as the high silica adakites. Petrographical and geochemical evidences indicate that the magma forming of these rocks originated from partial melting of mextamorphosed subducted oceanic slab in amphibolite facies. Second category includes relatively more depths igneous bodioes with gabbro to syenite composition and granular texture. With respect to high HREE and low LREE along with other characteristic such as silica content (49.31- 51.01(in wt %)), Yb about 2.1 ppm and Y approximately 21, second category can be classified as the low silica adakites. Mafic and felsic minerals of gabbroic rocks are pyroxene (augite), plagioclase and biotite. Their magma forming originated from partial melting of mextasomatised mantle wedage located on the above of oceanic subducted slap (Sabzevar – Darouneh branch).