H. Rahimi Sadegh; S. H. Moein Zadeh; M. Moazzen
Abstract
The study area is a part of the Sanandaj-Sirjan zone which is mainly composed of metamorphic rocks, a variety of igneous basic rocks and sediments. the metamorphic rocks studied at west of Kheyrabad, North of Gol-e Gohar mine in Sirjan, Kerman Province are slate, phyllite, schist (garnet schist, amphibole ...
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The study area is a part of the Sanandaj-Sirjan zone which is mainly composed of metamorphic rocks, a variety of igneous basic rocks and sediments. the metamorphic rocks studied at west of Kheyrabad, North of Gol-e Gohar mine in Sirjan, Kerman Province are slate, phyllite, schist (garnet schist, amphibole schist, micaschist, kyanite schists), epidote amphibolite, amphibolite, gneiss, quartzite and marble. Amphibolite facies is the highest metamorphic grade in the region experienced by the rocks. Protolith of amphibolites is basic to intermediate igneous rocks with chemical composition of calc-alkaline. Based on Ti against V diagram and Nb-Zr-Ydiagram, amphibolites of the study area belong to mid-ocean ridges (MOR) and Volcanic arc tectonic environments in relation to Neotethys ocean.Mineral chemical features classify amphiboles as calcic amphiboles. average temperature of amphiboles is 630°C and maximum pressure is 7.5 kbar for the studied amphibolites. Geothermal gradient of ~ 28°C/Km indicates a continental crust setting for metamorphism.
