Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

Yazarlar: Ali GÜREL

Konular:Mühendislik, Ortak Disiplinler

DOI:10.28948/ngumuh.297990

Anahtar Kelimeler:: Çiftlik basin,Diatomite,Facies,Mineralogy,Chemical composition

Özet:    The aim of this study is to determine paleontological, chemical and mineralogical aspects of PleistoceneHolocene diatomite of Ovalıbağ village in Çiftlik region. For this, scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersion X-ray spectrometry (EDS) and some chemical analyses have been carried out (X-RF and ICP). Diatomite beds alternate with pebbls, sands, silts and volcanic tuffs and consist of various diatomite types such as Cyclotella sp., Epithemia sp., fragilaria sp. Diatomite is commonly not pure and associated with mud, silt and sand. Physically, it is observed that diatomite shows no reaction with aside (except for HF) and begins to cook at 1150°C and to melt at 1300°C. Diatomite is composed of opal A, opal CT, quartz, feldspar and montmorillonite. If these materials are heated to 1200°C, then the dominated minerals are opal and/or cristobalite, quartz and feldspar. Chemical analyses yielded SiO2 65.2-79.8%, Al2O3 9.1-12.3%, Fe2O3 2.9-4.5%, CaO 0.6-2.3%, Na2O 1.1-1.4% and K2O 1.4-2.1%. This data has been compared with those published in various world literatures. SiO2 content of Çiftlik diatomite is lower in comparison to world literatures.

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