The southern third of the more than 8000 km long, Late Neoproterozoic/Early Paleozoic East African-Antarctic Orogen is characterised by tectonic escape, extensive late extensional tectonism and large volumes of late tectonic igneous rocks. We provide new SHRIMP dates that give tight time constraints for extensional tectonics and the timing of late-tectonic igneous activity. Two large granitoids intrusions were dated at c. 502 and 499 Ma, whilst metamorphism along a significant extensional shear zone was dated at c. 510 Ma. The two granitoids are part of a > 15,000 km2 large igneous province that can be traced into Northern Mozambique to the Lurio Belt. The granitoids have A2-type geochemistry and are thought to represent lower crustal partial melting, that probably resulted from asthenosphere influx after part of the orogen root had delaminated. The northern margin of the partially delaminated root might be represented by the Lurio Belt in Northern Mozambique.