KSL Kupferschiefer Lausitz is a German mining company headquartered in Spremberg. It is wholly owned subsidiary of the international mining corporation Minera S.A., that specializes in the exploration and mining of precious and base metals.

The exploration phase, which began in 2009 with exploratory drilling was successfully completed with the seismic early 2011. Now, the KSL is in the planning and approval phase for the mine. For this purpose it is currently conducting a technical and economic Pre-Feasibility Study. At the same time approval is sought for the life of mine plan, which includes the environmental impact assessment. The production of copper ore is planned after the planning approval and construction of the mine at the end of the decade.

Minera SA, the parent company of KSL, was founded in 1962 in Panama and is now managed from Washington DC. Together with its predecessor company, it has more than 45 years experience in natural resource exploration and in the operation of mines and smelting plants. Minera's focus is on the precious metals gold and silver as well as the base metals copper, zinc, tin and lead.