Characterization of two forms of sepiolite and related Mg-rich clay minerals from Yenidogan (Sivrihisar, Turkey)

An Early Pliocene sedimentary succession in the Yenidogan area, Sivrihisar, Turkey, consists of sepiolite, stevensite, kerolite, dolomite and magnesite. The geology, mineralogy and geochemistry of the succession was examined by extensive field work along several trenches and a representative measured section, followed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermal, and chemical analyses