Spectroscopic and morphologic characteristics of diamonds from Kimberlite pipe named after V.P. Grib

Comparative EPR analysis of paramagnetic centers in diamonds from Kimberlite pipe named after V.P. Grib (KPG) and other tubes of Archangelsc diamond-bearing province is presented. In the KPG samples, diamonds with EPR spectra of 1 group were present in much less content than diamonds from other pipes. The diamonds in KPG samples are mostly those of 2 group (with predominant center P2). Since P2 centers are formed (as known) upon crystals' elastic deformation, it's concluded, that epigenetic processes of elastic deformation in KPG diamonds have manifested stronger than in diamonds of other considered tubes.