PETROGRAPHY-PETROCHEMISTRY OF THE KIZILDAĞ VOLCANICS (DERİNKUYU/NEVŞEHİR-YEŞİLHİSAR/KAYSERİ): PETROGENETIC APPROACH

Abstract

The Kızıldağ volcanics of Quaternary age outcropps widespreadly in small volume bodies around the Derinkuyu (Nevşehir)-Yeşilhisar (Kayseri) region, middle Anatolian. These volcanics are grayish black, reddish black colored and aphyric basalt composition. They show hypocrystaline-porphyritic, hyalophilitic flow texture and consist of olivine, pyroxene and plagioclase. Kızıldağ volcanics have calc-alkaline character and MORB - normalized spider diagram indicate enrichment of lithophile elements (Sr, K, Ba) and depletion of high field stength elements (Zr, Ti, Y). Also lithophile elements and high field stength elements of Kızıldağ volcanics are similar to continental crust, relatively. Kızıldağ volcanics in the Neogene-Quaternary volcanics, located in the inner Taurid belt, interpretad that they are related to the subduction of the Afro-Arabian plate under the Anatolian plate.

Keywords

• Orta Anadolu, Kızıldağ volkaniti, bazaltikandezit/andezit, kalkalkalen, Magma mixing