Mineralogical and Geochemical Characteristics and Genesis of the Sepiolite Deposits at Polatli Basin (Ankara, Turkey)

被引:0
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作者
Muazzez Çelik Karakaya
Necati Karakaya
Abidin Temel
机构
[1] Selçuk Üniversitesi Müh-Mim. Fak. Jeoloji Müh. Böl.,
[2] Hacettepe Üniversitesi Müh Fak. Jeoloji Müh. Böl.,undefined
来源
Clays and Clay Minerals | 2011年 / 59卷
关键词
Amorphous Silica; Dolomite; Mg-rich Smectite; Sepiolite; Polatlı; Turkey;
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摘要
The Middle—Upper Miocene—Pliocene sediments near Polatlı contain commercial sepiolitic clay deposits. The sepiolite-rich Polatlı basin sediments were studied to describe the sepiolitic clay deposits of the area and to assess the environments of formation using X-ray diffraction, optical and scanning electron microscopy, and chemical analysis. The Polatlı basin is an elongated, rift-related graben trending NE—SW in central Turkey, filled with continental Late Miocene to Early Pliocene sediments. The sediments which comprise claystone, marl and limestone, dolostone, and evaporites are characteristic deposits of low-salinity, playa-lake depositional environments. These sepiolite-rich deposits include sepiolite, dolomite, and calcite, with minor amounts of palygorskite, quartz, moganite, amorphous silica (opal-CT), and feldspar.
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页码:286 / 314
页数:28
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