GEOCHEMICAL AND GEOCHRONOLOGICAL (Rb/Sr) PROPERTIES OF THE GUNYUZU GRANITOID (SIVRIHISAR, ESKISEHIR)

Bagci M., İLBEYLİ N., Kibici Y., Demirbilek M., Yildiz A.

12h International Multidisciplinary Scientific Geoconference (SGEM), Albena, Bulgaristan, 17 - 23 Haziran 2012, ss.47-49 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Albena
  • Basıldığı Ülke: Bulgaristan
  • Sayfa Sayıları: ss.47-49
  • Anahtar Kelimeler: Gunyuzu Granitoid, Rb/Sr isochron age, Sivrihisar, Eskisehir, METAMORPHISM
  • Akdeniz Üniversitesi Adresli: Evet

Özet

The Gunyuzu rocks are located to SE of the Tavsanli zone and trend NW-SE. They are composed of granite, granodiorite and granite porphyry. They are metaluminous-peraluminous, medium- to high-K calc-alkaline (I- and S-types) intrusions. The Rb-Sr dating method for the Gunyuzu granites indicates Middle-Late Eocene ages (47.0 +/- 1.0 to 40.8 +/- 3.0 Ma). Initial values of Sr-87/Sr-86 in the granites are between 0.70667 and 0.70620. Low values of molar K2O/Na2O, Al2O3/(FeO+MgO+TiO2) and (Na2O+K2O)/(FeO+MgO+TiO2) ratios show that the magma(s) in thes zone could be derived from lower crustal rocks.