Аннотация:Specific typomorphic features of diamondiferous peridotites and eclogites were estimated from analytical and literature data. The features point out onto the different sources of diamondiferous and diamond-free rocks among upper mantle xenolits in kimberlites. Syngenesis phase diagram for diamond and rockforming minerals of the peridotite-eclogite-carbonatite-diamond system (in a regime of
fractional crystallization) is constracted with the use of experimental data at 7 GPa (upper mantle PT-conditions). The analytical and experimental results are generalized and applied to development of phisico-chemical model for dimondiferous peridotite and eclogite genesis at the upper mantle chambers of diamond-parental carbonatite melts.
