The Kenieba Diamond Concessions
The 3415 sq. km Kenieba Nord & Sud diamond concessions cover an area of 16 known kimberlites as well as an area of alluvium or steam transported material where diamonds up to 232 carats have been previously discovered.

In observing a map showing the location of alluvial diamonds and kimberlite pipes, it is obvious that all of the kimberlite pipes in the area have yet to be found. There are at least 9 areas where diamonds have been found in alluvium by the orpailleurs, and source for the diamonds is unknown.

Several large diamonds have been discovered in alluvium along the Dounde River within the southern part of the concession. These include diamonds of 51.7, 98.0, 102.0, 137.5 and 232 carats. The 232 carat diamond was found 3 km south of the location of the discovery of the 51.7, 98.0, 102.0 and 137.5 carat diamonds . The 232 carat diamond was discovered in 1981 in a pit dug by a man known to Mamadou Keita (M.Sc. Geol.), Director of African Metals. The diamond was sold at the Banque du Development du Mali. Just recently diamonds of 0.3 and 0.5 carats were discovered by women orpailleurs in the same area.

The Koufara, Batifara and Kassama kimberlites, also in the eastern part of the concession, are aligned in a south-southeasterly direction. These are aligned along a fault, which, if projected a further 12 km south of the Kassama kimberlite, comes close to the site of the discovery of the 98 carat diamond and provides possible evidence for the existence of a nearby kimberlite. Further evidence for a kimberlite proximal to the locations of the 34, 51 and 98 carat diamonds is the fact that previous sampling within 600 to 1000 m of the site of each diamond shows moderate to high counts of picroilmenite, an indication that kimberlites could occur in close proximity to each of the diamonds. No detailed follow-up has been done in any of these three areas.