Petrographic And Geochemical Properties Of The Keban Magmatic Rocks (Keban-Elazığ)

Öz

In this study, the petrographic and geochemical characteristics of Late Cretaceous-Middle Eocene Keban magmatic rocks were examined in Keban-Elazığ. Apart from the Keban Magmatic rocks, the other units outcropping around the region are the Late Devonian-Late Triassic Keban Metamorphics, Paleogene-Neogene sedimentary units and Plio-Quaternary alluviums. The investigated rocks are represented by syenite porphyry and quartz-monzonites belonging to Keban Magmatic rocks, which cut the Keban metamorphic rocks. The Keban Magmatic rocks consist of the main minerals are K-feldspar (mega-phenocrystal), plagioclase, amphibole, biotite and quartz minerals, which shows porphyric, porphyric holocrystalline, poikilitic texture in general. All the samples are shoshonitic in composition and fall into the A-type granitoid region. The tectonic environment of the investigated rocks is post-collisional granites.

Anahtar Kelimeler

• Keban Magmatic Rocks
• Petrography
• Geochemistry
• Keban
• Elazığ

Keban Magmatik Kayaçları’nın Petrografik Ve Jeokimyasal Özellikleri (Keban-Elazığ)

Öz

Bu çalışmada, Keban-Elazığ bölgesindeki Geç Kretase-Orta Eosen yaşlı Keban Magmatik kayaçlarının petrografik ve jeokimyasal özellikleri incelenmiştir. Çalışılan bölgede Keban Magmatik Kayaçları dışında Geç Devoniyen-Geç Triyas yaşlı Keban Metamorfitleri, Paleosen-Neojen sedimanter birimleri ve Plio-Kuvaterner yaşlı alüvyonlar yüzeylemektedir. Çalışmanın konusunu oluşturan kayaçlar Keban metamorfik kayaçlarını kesen Keban Magmatik kayaçlarına ait siyenit ve kuvars-monzonitlerle temsil edilmektedir. İncelenen kayaçlar genel olarak porfirik, porfirik holokristalen, poiklitik doku özelliği gösteren K-feldispat (mega-fenokristal), plajiyoklas, amfibol, biyotit ve kuvars mineralleri ana mineral içeriğini oluşturur. İncelenen tüm örnekler şoşonitik karakterli olup A-tipi granitoid alanlarına düşmektedir. İncelenen kayaçların tektonik ortamı olarak çarpışma sonrası granitleri bölgesi önerilmektedir.

Anahtar Kelimeler

• Keban Magmatik Kayaçları
• Petrografi
• Jeokimya
• Keban
• Elazığ

Kaynakça

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