Mineralogical and physicochemical properties of talc from Emirdağ, Afyonkarahisar, Turkey

Authors : Bahri ERSOY, Sedef DİKMEN, Ahmet YILDIZ, Remzi GÖREN, Ömer ELİTOK

Pages : 632-644

Doi:10.3906/tar-1210-21

View : 15 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Lens-shaped talc deposits related to Mesozoic gabbroic rocks are exposed in an area of 2 km2, about 80 km northwest of Afyonkarahisar insert ignore into journalissuearticles values(western Anatolia);. Different alteration zones in talc deposits were determined depending on differences related to the texture and color of the host rock. In order to determine mineralogical, geochemical, and physicochemical features of the Emirdağ talc deposits, X-ray diffractometer, scanning electron microscope insert ignore into journalissuearticles values(SEM);, FT-IR and Mössbauer spectroscopy, differential thermogravimetric analyses, BET-specific surface area, color, water soluble substance, acid-soluble carbonate, and acid-soluble iron tests were performed on the samples collected from different alteration zones in the lateral direction. Four groups of mineral paragenesis were determined: i); talc and chlorite-bearing actinolite insert ignore into journalissuearticles values(E1);, ii); actinolite-rich talc insert ignore into journalissuearticles values(E-2);, iii); chlorite and calcite-bearing talc insert ignore into journalissuearticles values(E-3);, and iv); pure talc insert ignore into journalissuearticles values(E-4);. Talc, actinolite, and chlorite are dominant. SEM analyses show that fine shreds, like microcrystalline talc crystals, are associated mainly with actinolite and chlorite, and actinolites are mainly transformed into chlorite and talc. Ni and Cr contents of the Emirdağ talcs are consistent with the composition of the talc deposits formed in relation to ultramafic rocks. Energy dispersive X-ray spectrometry, chemical analysis, and Mössbauer spectroscopy results show that iron in the Emirdağ samples was mainly derived from talc minerals and this iron occurs as Fe+2 in the crystal lattice structure of talc. Because removal of iron from Emirdağ talc seems difficult during mineral processing techniques, the Emirdağ talc can be used in its crude state in the cosmetic, paint, and paper industries as a secondary raw material.
Keywords : Key words Talc, mineralogy, FT IR, Mössbauer spectroscopy, thermal analysis, industrial usage, Afyonkarahisar