Experimental Modeling of Diamond Resorption during Mantle Metasomatism

The morphology of resorbed diamond crystals is a valuable source information on the composition and ascent rate kimberlite magmas, as well possible redox conditions in protolith. Previously, resorption was thoroughly investigated at P–T–fO2 parameters magma ascent. In this study, we using unaltered group I model carbonatite that are typical peridotite magmas subcontinental lithospheric mantle. An analysis previous studies made it to determine octahedron transformation into spherical tetrahexahedron depending carbonate–silicate melt. It shown 6.3 GPa increases all systems fO2 temperature rise. There steady decrease pressure from 1 GPa. comparison experimentally produced samples with natural diamonds indicative significant contribution metasomatic alteration protolith by oxidized agent initial stages diamonds.