ABSTRACT
In Aïr (Niger), intense collision with Tibetan-type lithospheric delamination and crustal fusion occurred at 730–670 Ma. This allowed during final Gondwana closure at 645–580 Ma major horizontal displacement of terranes along mega-shear zones and abundant high-K calc-alkaline granitoids, both linked to an oblique oceanic ridge configuration. Based on these key results, a terrane map for the entire Tuareg shield is proposed.
