Lufilian Arc

The Lufilian Arc was 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.