OICC Press Iranian Journal of Earth Sciences 2228-785X 10 2 2018 04 01 Geochemical evolution and petrogenesis of the eocene Kashmar granitoid rocks, NE Iran: implications for fractional crystallization and crustal contamination processes 68 77 EN Rahim Dabiri Department of Geology, Faculty of Science, Islamic Azad University, Mashhad, Iran Mohsen Akbari-Mogaddam Geological Survey of Iran, North- East Territory, Mashhad, Iran Mitra Ghaffari Department of Geology, Tarbiat Modares University, Tehran, 14115–175, Iran Journal Article 2018 04 01 Kashmar granitoids of Taknar zone, in north part of Lut block, intruded into volcanic rocks and consist of granites, granodiorites, monzodiorite and gabbrodiorites. They are composed of mainly plagioclase, alkali-feldspar, quartz, amphibole, biotite and pyroxene minerals. Harker diagram variation, including negative correlations CaO, MgO, FeO, TiO2 and V and positive correlations K2O, Rb, Ba, and Th, with increasing SiO2 and chondrite-normalized REE patterns, suggest that fractional crystallization of gabbrodioritic rocks could have played a significant role in the formation of granites. Their chondrite-normalized REE patterns are characterized by LREE enrichment and show slight negative Eu anomalies. Chondrite-normalized REE modelling indicates that the magma of Kashmar gabbrodiorites were generated with 3–5% of partial melting of a a spinel-lherzolite source. Melting of parental magma located at ~53 km.