Dear list members, Which minerals or mineral groups could be used in geothermobarometries and according to which of their characteristics are they used? What is the idea? If you explain to me briefly or suggest reading materials, I will be glad. Best regards, Mustafa CIHAN Research and Teaching Assistant Middle East Technical University Department of Geological Engineering 06531 Ankara / TURKEY Tel: +90 312 210 57 38 (work) +90 312 280 58 87 (home) Fax: +90 312 210 12 63 E-mail: [log in to unmask] Web site: www.metu.edu.tr/~cihan/