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3+])-(F, OH)-bearing titanites in assemblages with ilmenites and magnetites are described from a polymetamorhic metabasite environment of the Chynov area.
However, ilmenites from tholeiites tend to have lower [Al.
The composition of the ilmenites recovered would indicate that a moderate amount of resorption could be expected.
After drilling through loose sand and a thick section of silcrete (Kalahari formation), numerous coarse kimberlitic ilmenites and pyrope garnets of up to 5 mm in size were visually identified in weathered kimberlite from 34 meters depth.
Kimberlitic chromites and ilmenites, whose mineral chemistry falls within the diamond stability field, were also recovered in this sampling.
Prior work by Motapa in this project area has recovered 22 microdiamonds, in association with numerous kimberlitic ilmenites, from both high-energy streams and low energy deflation surfaces.
Kimberlitic ilmenites and garnets were also recovered in the Guma area as a result of a 5 x 5 kilometer regional grid sampling campaign and previous direct sampling over target magnetic anomalies.
The microprobe analyses of the kimberlitic ilmenites extracted from the A12 samples collected during the 2003 drilling program define a diamond preservation potential index of 0.
Guzman supervised various research programs on sand beach ilmenites, which included the assessment of operating and cost parameters on both smelting new sand beach ilmenite ores and upgrading sand beach ilmenite through synthetic rutile processes.