Plajiyogranitler İçerisindeki Gabroyik Enklavların Petrografik ve Mineral kimyası özellikleri; Mersin ofiyolitinde Dalma-Batma Zonu Magma Oluşumuna Dair Kanıtlar (Güney Türkiye)

Yıl 2019, Cilt: 19 Sayı: 1, 213 - 225, 28.05.2019

Nusret Nurlu , Nil Yapıcı , Gökçe Şimşek Ahmet Can Akıncı Sedat Türkmen

https://doi.org/10.35414/akufemubid.456783

Öz

Mersin
ofiyolitinde gözlenen plajiyogranitler içirişindeki gabroyik-diyoritik enklavların
kökenini ve yerleşimini ortaya koymak amacıyla ilgili kayalar üzerinde detaylı
petrografi ve mineral kimyası analizleri yapılmıştır. Bu çalışmada İç Toros
Kenet Kuşağında gözlenen Mersin ofiyolitini kesen plajiogranitler içerisinde
bulunan Mafik Mikrogranuler Enklavlar (MME) ilk kez çalışılmış olup, (Pamukluk
barajı ve çevresi) mineral kimyası analizleri sunulmuştur. Bölgeden elde edilen
MME’lerin detaylı petrografi incelemeleri sonucunda gabroyik karakterde olmakla
beraber bir kısım örneklerin diyoritik oldukları ortaya konulmuştur. Plajiyogranitik
kayalar içerisinde boyutları 5 cm’den 50 cm’e kadar değişen Mafik Mikrogranular
Enklavlar (MME) gözlenmektedir. Çalışılan MME’lerden elde edilen klinopiroksen
analizlerinin Mg* numaraları 73.60 ile 86.28 arasında ve plajiyoklasların
Anortit (An) içerikleri 88.5 ile 90.8 arasında değişmektedir. Kimyasal
analizler sonucunda MME’lerden elde dilen plajiyoklasların çoğunlukla
anortit-bitovnit karakterinde oldukları ve Wo-En-Fs üçlü diyagramında
değerlendirilen veriler ışığında klinopiroksenlerin diyopsit oldukları ortaya
konulmuştur. Çalışılan MME’lerin Mersin ofiyolitine ait mafik kümülatlara
benzer özellikler sundukları ve ada yayı ortamında oluştukları belirlenmiştir. 

Anahtar Kelimeler

Mersin, Plajiyogranit, MME, Mineral kimyası, ofiyolit

Kaynakça

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