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Torkian A, Shirmohamadi Z, Jafari S R. Petrology, mineral chemistry and geothermobarometry of the Garmkhani-Meyham metamorphic complex (Qorveh-Kurdistan). www.ijcm.ir 2023; 31 (3) :479-496
URL: http://ijcm.ir/article-1-1767-en.html
URL: http://ijcm.ir/article-1-1767-en.html
1- Department of Geology, Faculty of Sciences, Bu-Ali Sina University, Hamedan, Iran
2- Department of Geology, Faculty of Sciences, Payam Noor University, Tehran, Iran
2- Department of Geology, Faculty of Sciences, Payam Noor University, Tehran, Iran
Abstract: (692 Views)
The Garmkhani-Meyham region is located in SE-Qorveh city, in the northwestern part of the Sanandaj-Sirjan zone. This area includes a variety of regional and contact metamorphic rocks. Microprobe data of mineral chemistry show that amphiboles, magnesium-hornblende type; plagioclases, andesine to albite type; biotite crystals, siderophyllite type; white mica, muscovite type and epidotes, clino-zoisite type are in composition. Based on the mineral chemistry of amphibole, the magmatic series of its constituent magma is the subalkaline and its tectonic environment is supra-subduction. Geothermometric estimates on the amphibole and plagioclase minerals in amphibole- schists, a temperature ranges from 464 to 570 °C and pressure between 3 to 5.6 kbar illustrate passing from greenschist facies to amphibolite facies.
Keywords: mineral chemistry, green schist, regional metamorphic, contact metamorphic, Sanandaj-Sirjan zone
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