Abstract
We propose to investigate the diamonds from the Kokchetav Massif, northern Kazakhstan, which is the best example of diamond–eclogite facies metamorphism, using cathodoluminescence (CL) techniques. CL spectra measurements of diamonds from garnet–pyroxene–quartz rocks and dolomitic marbles, made at 80 K, revealed peaks at 2.156, 2.463, and 3.188 eV and a broad band at 2.72–2.80 eV. Panchromatic and monochromatic diamond images analysed by CL reveal concentric zones of variable luminescence. This indicates that the diamond crystals grow during several metamorphic stages under ultra high pressure (UHP) metamorphism conditions. The inhomogeneous broadening and lower 2.156 eV ZPL peak suggests the presence of a higher concentration of defects and stresses in the rim compared to the core.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
