Index reaction textures and T estimation of Oshnavieh Eslamlu (W-Azarbaijan) metamorphic aureole

Eslamlu contact aureole, which is located at northern Oshnavieh Township, contains metapelites, calcsilicates and calcite-dolomite marbles. Some Cld, Grt, Crd, and porphyroblasts together with Sil, Hc and graphite crystals are existing at the metapelites. The most significant feature of Eslamlu aureole is its index informative reaction textures of metapelites through which metamorphic reactions are extracted. Textures and paragenetic relationship of index minerals has unraveled that overstepping rate has been high. Based on petrogenetic grid drawn from Thermocalc software data, temperature of garnet-cordierite-sillimanite zone estimated at least 700 °C at the pressure of 2 kbar.