Plajiyogranitler İçerisindeki Gabroyik Anklavların Petrografik Bileşimleri ve Mineral kimyası özellikleri; Mersin ofiyolitinde Dalma-Batma Zonu Magma Oluşumuna Dair Kanıtlar (Güney Türkiye)
Bu çalışmada İç Toros Kenet Kuşağında gözlenen Mersin ofiyolitini kesen plajiyogranitler içerisindebulunan Mafik Mikrogranuler Anklavlar (MME) ilk kez çalışılmış olup, (Pamukluk barajı ve çevresi)mineral kimyası analizleri sunulmuştur. Bölgeden elde edilen MME’lerin detaylı petrografi incelemelerisonucunda bunların gabroyik karakterde olmakla beraber bir kısım örneklerin diyoritik oldukları ortayakonulmuştur. Plajiyogranitik kayalar içerisinde boyutları 5 cm’den 50 cm’e kadar değişen MafikMikrogranular Anklavlar (MME) gözlenmektedir. Çalışılan MME’lerden elde edilen klinopiroksenanalizlerinin Mg# numaraları 73.60 ile 86.28 arasında ve plajiyoklazların Anortit (An) içerikleri 88.5 ile90.8 arasında değişmektedir. Kimyasal analizler sonucunda MME’lerden elde dilen plajiyoklazlarınçoğunlukla anortit-bitovnit karakterinde oldukları ve Wo-En-Fs üçlü diyagramında değerlendirilenveriler ışığında klinopiroksenlerin diyopsit oldukları ortaya konulmuştur. Çalışılan MME’lerin Mersinofiyolitine ait mafik kümülatlara benzer özellikler sundukları ve ada yayı ortamında oluştuklarıbelirlenmiştir.
Mineral Chemistry and Petrographic Compositions of the Gabbroic Enclaves in the Plagiogranites; Evidence on Supra-Subduction Zone Type Magma Genesis in Mersin ophiolite (South Turkey)
As a result of the detailed petrographic studies of the Mafic microgranular enclaves (MMEs) obtained from the region, it was revealed that some of the samples were dioritic with gabbroic character. In this study, MMEs in the plagiogranites cutting Mersin ophiolite observed in the Inner Taurus Suture Zone were studied for the first time and the mineral chemistry analyses were presented. MMEs are varying in size from 5 cm to 50 cm were observed within the plagiogranitic rocks of Mersin ophiolite. The clinopyroxene analyses obtained from the studied MMEs presented Mg# numbers ranging from 73.60 to 86.28 and also anorthite (An) contents of plagioclases ranging from 88.5 to 90.8. The chemical analysis revealed that the plagioclases obtained from MMEs are mostly anorthite-bitovnite and the clinopyroxenes are diopsides according to Wo-En-Fs triple diagram. It is determined that the studied MMEs presented similar properties to the mafic cumulates of the Mersin ophiolite and formed in the island arc environment.
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