This study has focused on provenance of Eslamlu metapelites, NW Iran. Whole rock chemistry analysis has revealed that these metapelites are rich in Iron and Aluminum and as a result the modal abundance of garnet (Almandine) is high. But those samples which are rich in SiO₂ are poor in Al₂O₃, therefore, Eslamlu metapelites have less cordierite and aluminosilicates. The position of different samples in AFM compatibility diagrams is similar, as a result, bulk rock chemistry variable was constant and parageneses are produced due to changes in P and T of metamorphism. Further studies has unraveled that parent sedimentary rocks have been Fe-shale and graywacke. The high concentration of Al₂O₃ and Fe₂O₃ shows that the rocks are Laterite.  PIA, CIA and CIW indexes are high showing intense weathering conditions; hence the aluminum content is very high. According to major element composition of metapelites, tectonic environment of igneous parent of sediments, not Ruteh sediments, has been active continental margin.