Rock fabrics in thin sections of typical samples from the Tokapal tuff-facies kimberlite system.


A: Loosely packed, resedimented (?) pelletal lapilli and pseudomorphed olivine macrocrysts in serpentine-talc matrix (plane light);
B: Loosely packed faintly bedded volcaniclastic kimberlite with carbonatized pelletal lapilli/olivine macrocrysts (plane light);
C: Lobate-shaped fluidal lapillum with core consisting of serpentinized olivine and kimberlitic selvage zone (dark) rich in opaques (plane light);
D: Euhedral autometasomatic titanite in strongly altered kimberlite tuff with leached open spaces (white) (plane light).

 

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