Geology
The Copperbelt region of Zambia and Congo D.R. is a 500 million year old mountain chain, the Lufilian Arc, which formed when two large pieces of continental crust, the Kalahari craton and the Congo craton, collided. This collision was one of the many that happened between 700 and 500 million years ago to form the Gondwana supercontinent.
This collision is thought to have remobilised base metals, largely already present in the sediments that had accumulated in the basin between the two cratons. These brines then concentrated the base metals either along stratigraphic boundaries, or along fractures, faults or within structurally controlled 'traps' (such as the nose of a fold). The collision also produced crustal shortening, during which the stratigraphic sequence was tectonically pushed northwards on top of the Congo Craton.
The Lufilian Arc contains two diamictites, megaconglomerates of glacial origin. One of those is correlated with the Sturtian glaciation, while another correlates with the Marinoan Glaciation, both global glaciation events that had profound influence on the history of the planet.
The Lufilian Arc is correlated along trend to the west with the Damara Orogen in Namibia, which also hosts large mineral deposits.
Copperbelt Province is rich with mineral finds and mines. The name of the province is given by the rich finds of copper ore (e.g. Chingola, Konkola, Nchanga Mines), but notable are also emerald mines along Kafubu River, which in the first 6 months of 2011 yielded 3.74 tons of high quality emeralds.
Read more about this topic: Copperbelt Province