Gem-quality Turkish purple jade: Geological and mineralogical characteristics

HATİPOĞLU M., Basevirgen Y., Chamberlain S. C.

JOURNAL OF AFRICAN EARTH SCIENCES, cilt.63, ss.48-61, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 63
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.jafrearsci.2011.11.004
  • Dergi Adı: JOURNAL OF AFRICAN EARTH SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.48-61
  • Anahtar Kelimeler: Purple jade, Confocal dispersive Micro-Raman spectroscopy (DC mu RS), XRF and ICP-AES, XRD, Specific gravity (SG), Polarized-light microscopy, HIGH-PRESSURE METAMORPHISM, NORTHWEST TURKEY, CRYSTAL-STRUCTURE, NONDESTRUCTIVE IDENTIFICATION, GLAUCOPHANE, CALIFORNIA, PYROXENES, LAWSONITE, PETROLOGY, GEOCHRONOLOGY
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In the Harmancik-Bursa region of the western Anatolia (Turkey), an extensive contact metamorphic aureole at the border between the Late Mesozoic coherent metaclastic rocks of blueschist facies and the Early Senozoic intrusive granodiorite stock hosts an interesting and unique gem material with a mineral assemblage consisting mainly of jadeite, quartz, orthoclase, epidote, chloritoid, and phlogopite as identified by X-ray diffraction spectroscopy and polarized-light microscopy. In addition, chemical analyses performed with X-ray fluorescence and inductive-coupled plasma-atomic emission spectroscopy show that the mass of the metamorphic aureole has a silica-rich, calc-alkaline chemical content. Therefore, some rock building elements (such as Al, Ca, Na, K, P. Sr, and B of which characterize an acidic-neutral rock formation) and trace elements (such as Fe, Cr, Mn, Be, Cu, Ga, La, Ni, Pb, and Zn) are remarkable high ratios.