Abstarct: Bashtin area, with 150 km2 extension is located in the west of Sabzevar, in the Khorasan Razavi provinence. This area is a part of the Sabzevar ophiolitic zone. The mentioned ophiolitic zone and associated rocks intruded by many Andesitic to rhyolitic domes. Some fragments of host rocks which include tuffaceous shale and sandstone, volcaniclastic rocks and harzburgites are found such as enclaves. The presence of a huge volume detritic fragments that originated from these domes, in the Pliocene-Pleistocene conglomerates and their absence in Miocene marl units indicate that the studied domes probably outcropped around the Miocene-Pliocene boundary age. Of course, there are subvolcanic domes with the same composition but younger (up to 2 million years ago) in the north parts means toward Sfaryan– Ghuchan volcanic belt. Subvolcanic or extrusive rocks are so fine grain that, it isn't possible to distinguish the rock forming minerals by unaided eye. The studied rocks mainly show porphyry, gelomeroporphyry, microlitic porphyry, porphyroidic and microgranular textures. The mentioned rocks have geochemical characteristics of adakites and belong to high-silica adakites. These rocks have mextaluminous nature and belong to high-K calc-alkaline and normal calc- alkaline series. Have been observed trends in different geochemical diagrams (harker diagrams, Index differentiations diagrams and…) confirms the occurrence of fractional crystallization for evolution of the studied rocks. Petrogenetic investigations indicate that these rocks have been produced by medium rate partial melting and fractional crystallization under high pressure conditions. Also, magma producing of the studied rocks have been supposed assimilation and fractional crystallization during ascent to higher levels of the crust or emplacing in the ophiolitic belt. The presence of the polygenetic enclaves from host rocks in the studied domes, confirms this suggestion.