Gemmological and mineralogical investigations and genesis of the kammererite from the Kesis (Erzincan) and Kop (Erzurum) mountains

HATİPOĞLU M., Oguzer M. B., BUZLU H. B.

JOURNAL OF AFRICAN EARTH SCIENCES, cilt.84, ss.20-35, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 84
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.jafrearsci.2013.03.001
  • Dergi Adı: JOURNAL OF AFRICAN EARTH SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.20-35
  • Anahtar Kelimeler: Kammererite, Chromian clinochlore, Podiform-type chromitite ore deposits, Kei (Erzincan) and Kop (Erzurum) mountains, Turkey, HIGH-PRESSURE BEHAVIOR, RAMAN-SPECTROSCOPY, VIBRATIONAL SPECTROSCOPY, IDENTIFICATIONAL TOOL, CRYSTAL-STRUCTURE, CHLORITE, CLINOCHLORE, SPECTRA, COORDINATION, DEFORMATION
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Even though there are many chromitite deposits in Turkey, the most productive chromitite deposits including chromian clinochlore and chromian are present in the eastern Anatolia region. Kammererite (chromian clinochlore), in essence, is one of the rarest clinochlore minerals as a sub-variety of large family of the chlorite minerals. Even though it is the monoclinic IIb-2 polytype, with symmetry C2/m, which is one of the most abundant regular-stacking one-layer chlorites occurring in nature, the crystallization of chromian clinochlore is less abundance. Hence, gem-quality magenta colored kammererite which may be formulized as [Mg-5(Al, Cr, Fe)(2)Si3O10(OH)(8)] with reference to the abundance of the main oxides in the XRF bulk analyses, is only found in Turkey worldwide. Therefore, they are called Turkish kammererite. Beside of the mineral kammererite, the minerals uvarovite, magnesite, chromian spinel, chlorite and some garnets are also present in the paragenesis.