RESOURCE BASE
Probable Reserve: 5.52Mt at 0.74% Cu, 0.55% AsCu
4.2.6 Tailings Dams
As of August 2005, the Tailings Dams (TD) at Nchanga were being processed at the nearby Tailings Leach Plant (TLP). They comprised relatively coarse tailings residue arising from the treatment of ROM copper ore at the Nchanga concentrator dating from 1964. The remaining dumps were TD2, TD3 and TD4, which were established in 1964, 1974 and 1972 respectively.
The database for the Tailings Dams as of August 2005 included the results of drilling and test pit campaigns undertaken between 1976 and 1990 and later in 2000. The results of this work form the basis of the August 2005 estimate.