South Atlantic hot spot-plume systems: 1. Distribution of volcanism in time and space

Post-Gondwana Africa and the vertebrate history of the Angolan Atlantic Coast

“…Africa's drift can be followed especially well because conjugate basins shared between Africa and South America provide fixed starting points (Brownfield and Charpentier, 2006), and because of seafloor magnetic stripes (Cande et al, 1989;Müller et al, 1997;He et al, 2008), hot spot traces (O'Connor and le Roex, 1992;O'Connor et al, 1999), predicted paleolatitudes determined from igneous rocks (Strganac et al, 2014a), and fault zones that can be followed from the Mid-Atlantic Ridge to the coast of Africa ( fig. 4) (Eagles, 2007;Guiraud et al, 2010).…”

Great earthquakes and slab pull: interaction between seismic coupling and plate–slab coupling

“…2a), which are obtained [13] from compiled rotation poles for all plates [37] combined with recently updated estimates for the relative motion of Africa and South America [41]. We evaluate each prediction of plate motions by calculating its mis¢t with observed plate motions.…”

Plates Amalgamation and Plate Destruction, the Western Gondwana History

“…Ethiopia-Yemen/Afar) are still quite active, whereas those born between 100 and 140 Ma may be failing while those older than 150 Ma do not in general have an active trace (Duncan & Richards, 1991;Courtillot et al, 1999), it is very difficult to explain the whole Air-CL trend by a simple motion of the plate over one stationary hotspot as in the Hawaiian system. The 1650 km distance stretched by the magmatic provinces following this trend is more than three times the postulated diameter of the St. Helena plume tail (O'Connor & Le Roex, 1992;Wilson, 1992). Burke (2001) also demonstrated that a single plume, dubbed the '711' plume, formed the Nigerian granites, generated a topographic dome at ca 140 Ma on which the triple-rift system among which the BT developed, and that the plume was also involved in forming the Cameroon granitic complexes: (i) Between 213 and 141 Ma, the 711 plume generated a 400 km-long line of intrusions as the continent moved over it.…”