Application of Cathodoluminescence to Recognize Diagenetic Trends of Carbonate Rocks

CL images provide insights, not available by other research techniques, into diagenetic changes, such as cementation and porosity loss, which take place in sandstones, shales, and carbonate rocks during burial. In this study perform some cathodoluminescence photos of Lower Cretaceous (Aptian- Albian) Limestones, which are called Dariyan Formation located in Fars area, SW of Iran are presented. Petrographic and cathodoluminescence observations suggest diagenetic alteration of Dariyan Formation occurs in a burial setting. Different generations of spary calcite cement were recognized in the Dariyan limestone mainly in burial setting. Minescus cement with bright luminescent, indicating meteoric vadose diagenesis. The origin of equant cement is shallow burial, syntaxial cements are burial, too. Drusy cements are meteoric and reveal bright luminescence with zoning. Trace elements (Sr, Na, Mn, Fe) bivariates plots and Delta *d(18)O - Delta *d(13)C isotop plot confirm these conclusions.