3230–3200 Ma post-orogenic extension and mid-crustal magmatism along the southeastern margin of the Barberton Greenstone Belt, South Africa (original) (raw)

The Barberton Granitoid-Greenstone Terrain in South Africa reflects a complex geological history involving multiple magmatic events and tectonic processes. Recent investigations suggest that a pivotal phase of TTG magmatism occurred between 3236 and 3227 Ma, followed by a brief mid-crustal extension phase from 3228 to 3205 Ma. This study provides evidence of extensional shearing and exhumation linked to the emplacement of granodiorite bodies along a major NE-trending detachment. The findings enhance the understanding of the geological evolution of the Barberton Greenstone Belt, including constraints on sediment deposition and mechanisms of magmatism.