Burçin ÇETREZ, Nurdane İLBEYLİ, Alper GÜNEŞ, Mehmet DEMİRBİLEK, Yusuf URAS

YEŞİLOVA (BURDUR) OFİYOLİTİNİN KUZEYBATISINDA YER ALAN ULTRAMAFİK-MAFİK KAYAÇLARIN VE İZOLE DAYKLARIN PETROLOJİSİ VE JEOKİMYASI

Toros kuşağında Likya napları içerisinde yer alan Yeşilova (Burdur) Ofiyoliti ultramafik tektonitler, ultramafik-mafik kümülatlar, izotropik gabrolar, plajiyogranitler ve bazaltlardan oluşmaktadır. Bu çalışma, Yeşilova Ofiyolitinin, Salda, Düden ve Doğanbaba (KB Yeşilova, Burdur) mevkilerinde yüzeyleyen, ultramafik-mafik kayaçları (ana kayaçlar) ve bu kayaçları kesen izole dayklar ile ilgilidir. Bu araştırmada, kayaçların petrografik, jeokimyasal ve petrolojik özellikleri belirlenmeye çalışılmıştır. Yapılan petrografik incelemeler sonucunda ana kayaçlar serpantinit ve gabro, izole dayklar ise diyabaz bileşimine sahiptir. Ana kayaçlarda ve izole dayklarda serpantinleşme, uralitleşme, kloritleşme, sossoritleşme, epidotlaşma ve serisitleşme gibi alterasyon türleri gözlenmiştir. Ana kayaçlarda elek/ağ dokusu, izole dayklarda ise ofitik/subofitik ve intersertal dokular gözlemlenmiştir. Ti/Y - Nb/ Y diyagramına göre Yeşilova örnekleri toleyitik ve alkalen özelliktedir. Örümcek diyagramlarda, ana kayaçlar ve izole dayklarda LIL (ör: Rb, Ba, K, Sr, Eu) elementlerinde zenginleşme ve HFS elementlerinde (ör: Ta, Nb) ise tüketilme gözlenmektedir. Kondrit-normalize REE diyagramlarına göre ana kayaçlarda ve izole dayklarda LRE elementlerinde tüketilme ve HRE elementlerinde ise yataya yakın bir dağılıma sahip olup; N-MORB trendine benzerlik göstermektedir. Jeokimyasal değerlendirmeler sonucunda ise inceleme konusu olan kayaçlar için dalma-batma zonundaki (SSZ) yay ile ilişkili bir magmadan türediği söylenebilir.

Anahtar Kelimeler:

Yeşilova ofiyoliti, İzole dayk, Diyabaz, Toleyit, SSZ

PETROLOGY AND GEOCHEMISTRY OF ULTRAMAFIC-MAFIC ROCKS AND ISOLATED DIKES IN THE NORTHWEST OF YEŞİLOVA (BURDUR) OPHIOLITE

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