Ali Rıza SÖĞÜT, Kerim KOÇAK, Veysel ZEDEF, Raziye Merve KAYA, Adnan DÖYEN

Konya Yöresinde (Orta Güney Türkiye) Geç Kretase Yaşlı Hatip Ofiyolitik Melanjının Metamorfik Taban Kayaçlarındaki Amfibol Minerallerinin Mineralojik Ve Kimyasal Özellikleri

Konya yöresinde Neotetis topluluğu, Geç Kretase yaşlı makaslanmış serpantinit ve harzburgitlerin altında ince dilimler şeklinde metamorfik taban kayaçlarının bulunduğu Hatıp ofiyolitik Melanjı ve Çayırbağı ofiyolitleri ile temsil edilirler. Bu çalışmada, metamorfik dilimde yer alan metamagmatik kayaçlardaki amfibollerin mineralojik özelliklerinin ve kimyasal bileşimlerinin ortaya konulması amaçlanmıştır. Metamorfik dilimdeki ana kayaç tipleri nematoblastik - porfiroblastik dokuya sahip olan amfibolit (% 90.3 lere varan amfibol); epidot amfibolit (%65.3 amfibol); zoisit amfibolit (%52.2 amfibol) ve amfibol kuvarsit (%28.5 amfibol) tir. Amfibollerin kimyası, amfibollerin orta basınç şartlarında (≤ 7 kb) sulu bir mağmadan kristalleşen magnezyohornblend, pargazit ve edenit bileşiminde olduğunu ortaya koymaktadır. Eldeki veriler, ayrıca Neotetis topluluğunun daha sonra amfibollerde kimyasal bir değişiklik oluşturmayan yeşilşist fasiyesi şartlarında bölgesel bir metamorfizmaya uğradığını vurgulamaktadır.

MINERALOGICAL AND CHEMICAL CHARACTERISTICS OF THE AMPHIBOLE MINERALS FROM THE METAMORPHIC SOLE ROCKS OF THE LATE CRETACEOUS AGED HATIP OPHIOLITIC MÉLANGE IN THE KONYA AREA (CENTRAL SOUTHERN TURKEY)

In the Konya area, the Neotethyan assemblage is represented by Late Cretaceous aged HatıpOphiolitic Mélange, in where the metamorphic sole rocks crop out as thin slices beneath the shearedserpentinites and harzburgites, and Çayırbağı ophiolite. This study aims to characterize the mineralogicalcharacteristics and chemical composition of the amphiboles in the metamagmatic sole rocks of the HatıpOphiolitic Mélange. The main rock types in the metamorphic sole rocks are amphibolite (amphibole up to90.3 %); epidote-amphibolite (65.3% amphibole); zoisite-amphibolite (amphibole 52.2%) and amphibolequartzite(amphibole 28.5%) with nematoblastic to porphyroblastic texture. The microprobe analyses of theamphiboles suggest that the amphiboles have crystallized from a wet magma in medium pressure condition(≤ 7 kb), and are magnesiohornblende, pargasite and edenite in composition. The obtained data also revealthat the Neotethyan assemblage has experienced a regional metamorphism in greenschist facies conditions,which resulted in no chemical changes in the amphiboles.

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