Thenardite mineralizations of cayirhan sulfate occurrences in Ankara, Turkey: Investigation of paragenesis and formation mechanisms

KEPEKLİ T. A., Maral M., Maral D., Karalar A., Günaçgün L. S., Suner M. F.

10th International Multidisciplinary Scientific Geoconference and EXPO, SGEM 2010, Varna, Bulgaristan, 20 - 26 Haziran 2010, cilt.1, ss.603-610, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 1
  • Basıldığı Şehir: Varna
  • Basıldığı Ülke: Bulgaristan
  • Sayfa Sayıları: ss.603-610
  • Anahtar Kelimeler: Ankara, Evaporates, Paragenesis, Sulfates, Thenardite
  • İstanbul Yeni Yüzyıl Üniversitesi Adresli: Hayır

Özet

Preliminary investigation of mineralizations of Thenardite associated with sulfate occurrences in Çayi{dotless}rhan - Beypazari{dotless}, Ankara is presented. Local geology consists of Paleozoic metamorphite schists, Permo-triassic granitic rocks, Middle Jurassic - Upper Cretaceous limestones and marls in flysch facies, Paleocene aged land sedimentaries and marine Eocene units, Miocene to Pliocene aged lacustrine units, which sodium sulfates are associated to. Thenardite, Glauberite and Mirabilite minerals have been detected by XRD analysis. Thenardite formations have precipitated in small lakes during Pliocene in middle Anatolia. Ten thenardite samples have been investigated for Ca, Mg, Sr, K and Na elements in order to determine the geochemical properties of the mineralization. Petrographical and geochemical analyses show varying cycles and phases of mineral paragenesis, indicating sudden changes of evaporate precipitation history.