Hydrothermal alteration products in the vicinity of the Ahirozu kaolin deposits, Mihaliccik-Eskisehir, Turkey

Sayit I. O., GÜNAL TÜRKMENOĞLU A., Sayin S. A., Demirci C.

CLAY MINERALS, vol.53, no.2, pp.289-303, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 53 Issue: 2
  • Publication Date: 2018
  • Doi Number: 10.1180/clm.2018.19
  • Journal Name: CLAY MINERALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.289-303
  • Keywords: hydrothermal alteration, kaolin deposit, argillic alteration, propylitic alteration, epithermal deposit, Ahirozu, Turkey, ALUNITE DEPOSITS, GEOTHERMAL SYSTEMS, GENESIS, ROCKS, GOLD, HALLOYSITE, MINERALOGY, VOLCANICS, ORIGIN
  • Middle East Technical University Affiliated: Yes


The mineralogy, texture and composition of rocks associated with the kaolin deposits in the Ahirozu-Hamidiye-Ucbasli area, SE of Mihaliccik, Eskisehir, Turkey, were investigated. In the study area, Triassic, blue-green schists and serpentinized ultramafic rocks are exposed. Kaolinization occurs at the contact between a Triassic granitic intrusion and metamorphic rocks. Textural and mineralogical characteristics were identified by X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) analyses. The effects of hydrothermal alteration on the whole-rock chemical composition were determined by inductively coupled plasma mass spectrometry (ICP-MS) analysis. Homogenization temperature (T-h, degrees C), salinity, (wt.% NaCl) and melting temperature (T-m, degrees C) were detected by fluid-inclusion analyses.