Clay minerals in hydrothermally altered volcanic rocks, Eastern Pontides, Turkey

Celik M., KARAKAYA N., Temel A.

CLAYS AND CLAY MINERALS, cilt.47, sa.6, ss.708-717, 1999 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 47 Sayı: 6
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1346/ccmn.1999.0470604
  • Dergi Adı: CLAYS AND CLAY MINERALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.708-717
  • Anahtar Kelimeler: bentonite, clay minerals, Eastern Pontides, hydrothermal alteration, illite, smectite, toseki, volcanogenic massive sulfide, ORE-DEPOSITS, MINERALIZATION, CHEMISTRY, SMECTITE, ILLITE
  • Hacettepe Üniversitesi Adresli: Evet

Özet

Extensive hydrothermal alteration is observed around volcanogenic massive sulfide deposits. These deposits are related to Late Cretaceous volcanism in various parts of the Eastern Pontide province. Mineral assemblages resulting from alteration consist of mostly clay minerals and silica polymorphs, some sulfate minerals, and scarce zeolite minerals. The clay minerals are kaolinite, illite, and smectite. These minerals were examined using X-ray diffraction (XRD), scanning electron microscopy (SEM)energy dispersive spectrometry (EDS), X-ray fluorescence spectroscopy (XRF), and differential thermal analysis (DTA)-thermal gravimetry (TG) techniques. The illite and the toseki deposits are a result of hydrothermal alteration of dacitic-andesitic volcanites. Two groups of bentonite deposits occur; the first mainly formed by hydrothermal solution whereas the second group resulted from halmyrolysis.