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sadri S, Amel N, Moayed M. Mineral chemistry and thermobarometry of Kharil-Klasur intrusive rocks (SW Kaleybar. www.ijcm.ir 2024; 32 (2) :215-226
URL: http://ijcm.ir/article-1-1858-en.html
URL: http://ijcm.ir/article-1-1858-en.html
1- Department of Geology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
Abstract: (738 Views)
The kalasur_Kharil granitoid complex with Oligocene age, is located in SW Kaleybar of NW Iran, Alborz-Azarbaijan zone. The rocks are intruded into the Cretaceous volcanic and sedimentary rocks. The composition of plutonic rocks are consist of gabbro-diorite, diorite, quartz monzodiorite and granite. The major minerals in gabbro-dioritic and dioritic rocks are plagioclase, clinopyroxene, amphibole, biotite and major minerals in quartz monzodioritic and granitic rocks are potassium feldspar, plagioclase, quartz, amphibole and biotite. On the basis of mineral chemistry, the composition of clinopyroxenes is in diopside range. Amphibole minerals are calcic in study area. The calcic amphiboles indicates that the rocks of the studied area belong to type I granitoids. The Khari- Kalasour amphiboles are magnesio hornblende. The biotite in Kharil- Kalasur granite with Fe/(Fe+Mg)>3 is magnesio-biotite. The feldspar composition is albite-andesine in granite, labradorite, andsine and orthoclase in dioritic and quartz monzodioritic rocks. Mineral chemistry of the biotite, amphiboles and pyroxenes indicate that this rocks are calc-alkaline and have been crystallized in a subduction zone setting.
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