A mine plan and budget for calendar 2012 has been approved by Rio Tinto plc, the operator of theand the The plan for calendar 2012 foresees production of approximately 8.3 million carats (100% basis) from the mining of 2.0 million tonnes of ore and processing of 2.2 million tonnes of ore. Open pit mining of approximately 1.0 million tonnes is expected to be exclusively from A-418. Underground mining of approximately 1.0 million tonnes is expected to be sourced equally from the A-154 South and A-154 North kimberlite pipes. Included in the estimated production for calendar 2012 is approximately 1.0 million carats from and 0.1 million carats from the implementation of an improved recovery process for small diamonds. These and small diamond recoveries are not included in the reserves and resource statement and are therefore incremental to production.
Based on thesales during the first quarter and the current diamond recovery profile of the processing plant, the has modeled the approximate rough diamond price per carat for each of the ore types as follows:
|Ore Type||February and March 2012 Average Price per Carat (in US dollars)|
|A-418 A Type Ore||$145|
|A-418 B Type Ore||$100|