Location and History
Our Lefa mine is some 700 km north east of Conakry, the capital of the Republic of Guinea and is connected to an all-season road that has easy access to an air strip.
Commercial production began at the Lefa mine in 2008. The mine was acquired by Nordgold at the end of July 2010, as part of the Crew Gold acquisition, with financial results consolidated from August 2010.
Lefa gold mine operates a typical modern open pit operation with three major mining areas and several smaller, higher grade satellite pits, which will provide supplementary feed for the mill over the life of the project.
Gold production (koz)
- Nordgold obtained a controlling interest in Lefa mine at the end of July 2010. Figures for 2010 represent only the period after Crew Gold was acquired by Nordgold, i.e. from August to December 31, 2010, while the 2011 column represents the full-year operations of Crew Gold as part of the group. All the changes in 2011 in comparison to 2010 are explained by the different periods of operations as part of the group in 2010 and 2011.
Mineral Resources and Ore Reserves Summary (31 December 2017)
|Category||Ore (Kt)||Grade (g/t)||Au (Koz)|
|Measured and Indicated||83,009||1.18||3,147|
|Proven and Probable||56,026||1.22||2,198|
Lefa consists of two main open pits and several smaller satellite pits, an eight-kilometer conveyer belt from Lero-Karta pits to the processing plant, a processing plant with a crushing circuit, two SAG mills, two ball mills and a CIP circuit, waste rock dumps, a specially constructed tailing storage facility, and a water management system.
Milling and Classification
Cyanide leaching and sorption
- Increase annual mining volumes to 55Mt to match process plant capacity with optimal ore blend from open pits, including satellite oxide open pits to maximize mill throughput.
- TSF 1 & 2 and powerhouse feasibility studies, SAG mill 2 pinion foundation repairs, and leach/CIP tanks refurbishment.
- Exploration continues to evaluate the greater Fayalala complex potential, satellite open pits as oxide ore sources to maximise mill throughput, while deep drilling under the Lero-Karta complex commenced to test high-grade extension for potential underground mining.