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Title: $CHEMICAL CHARACTERIZATION OF GARNET AND P-T CONDITIONS OF METAMORPHISM OF THE TRIASSIC ROCKS OCCURRING TO THE SOUTH OF ORESHNIK, SOUTH-EAST BULGARIA
Abstract: This study provides data about the chemical composition of garnet and associated minerals from the quartz-mica schists occurring to the south of the village Oreschnik, Sakar Mountain, and coustrains the P-T conditions of metamorphism. The chemical composition of the following minerals have been studied by electron microprobe: garnet, biotite, staurolite, white mica, chlorite, plagioclase. The metamorphic grade is of lower amphibolite facies. The P-T estimate for a staurolite - garnet - white mica - biotite - chlorite - plagioclase schist is T = 6160 C, σ (T) = 21 and P = 7,8 kbar, σ (P) = 1.3.