Petrography, SEM-EDAX and spectroscopic implications of ruby corundum occurrences, close to the contact of Peralimala Pluton and Moyar Shear Zone in Chanappara area of Kannur District, Kerala, India
Corundum of semi precious gem variety occurs within the hydrothermally altered metaultramafites in the retrograde metamorphic terrain of kannur district along the north eastern part of kerala. Samples of semi-translucent to opaque nature with red to crimson red colour are studied through advanced spectroscopic techniques namely FTIR, Raman, Photoluminescence, UV-Visible and SEM-EDAX. Spectroscopic studies coupled with Geochemical perspective indicates the presence of considerable concentration of Cr2+ accompanied by more or less equal amounts of Ti2+, V2+ and Ga2+, along with other ions.