Shahid Beheshti University Researches in Earth Sciences 2008-8299 10 2 2019 05 22 Morphological study of zircon crystals from gneissic granite of Abadchi, North of Zayandeh-Rud dam Morphological study of zircon crystals from gneissic granite of Abadchi, North of Zayandeh-Rud dam 134 147 97007 10.52547/esrj.10.2.134 FA Fariba Riyahi Samani M.Sc in Petrology, Faculty of Natural Resources and Earth Sciences, Shahrekord University Nahid Shabanian Associate Professor, Department of Petrology, Faculty of Natural Resources and Earth Sciences, Shahrekord University Alireza Davoudian Professor, Department of Petrology, Faculty of Natural Resources and Earth Sciences, Shahre Kord University Journal Article 2017 05 19 Small gneissic granite body of Abadchi is a deformed, folded and metamorphosed granitoid which occurred in North of the lack of Zayandeh-Rud dam, as a part of Sanandaj-Sirjan Zone. The mineralogical composition contains quartz, plagioclase, K-feldspar, biotite, amphibole and muscovite as main minerals, as well as zircon, titanite and allanite as accessory minerals. Zircon typology of the gneissic granite body mostly introduces the fields P2. The morphology of zircon grains represents a slightly crust to mantle origin for protolith magma of the gneissic granite. According to the zircon morphology, as geothermometer, the crystallization temperature of the zircon crystals is about 750 -800 ° C. Small gneissic granite body of Abadchi is a deformed, folded and metamorphosed granitoid which occurred in North of the lack of Zayandeh-Rud dam, as a part of Sanandaj-Sirjan Zone. The mineralogical composition contains quartz, plagioclase, K-feldspar, biotite, amphibole and muscovite as main minerals, as well as zircon, titanite and allanite as accessory minerals. Zircon typology of the gneissic granite body mostly introduces the fields P2. The morphology of zircon grains represents a slightly crust to mantle origin for protolith magma of the gneissic granite. According to the zircon morphology, as geothermometer, the crystallization temperature of the zircon crystals is about 750 -800 ° C. https://esrj.sbu.ac.ir/article_97007_2551e643fbff1c16c3b3a75dfe77b781.pdf