Geological settingThe Cape Granite Suite was formed approximately 560 to 520 Ma ago during the Saldanian orogeny which occurred between 780 and 510 Ma ( Harris and Vogelli, 2010; Villaros, Stevens and Buick, 2009). This orogeny was formed following the convergence of the Rio de la Plata and Kalahari cratons during the formation of Gondwanaland (Harris & Vogelli, 2010). CGS granitoids were intruded into three terranes of the Malmesbury Metasedimentary and Metavolcanic Group which are divided by distinct northwest-trending shear zones (Scheepers, 2000). These terranes include the Tygerberg terrane in the southwest, the Swartland terrane in the center, and the Boland terrane in the northeast (Fig. 1) (Scheepers, 1995). The Saldania Mobile Belt includes structural features characterized by the occurrence of ductile and dextral strikes. -the sliding shear which preceded the orogenic event which occurred approximately 600 Ma ago (Scheepers, 2000). This led to the first phase of magmatism around 560-540 Ma (Scheepers & Nortje, 2000). This phase involved syn- to post-tectonic S-type granites intruding the Tygerberg terrane (Scheepers & Nortje, 2000). The second phase concerned the intrusion of type I granites. As with the type S granites, the strike-slip movement affected the intrusion of type I granitoids which occurred along the Colenso fault in the terranes of Swartland and Boland approximately 540 to 520 Ma ago (Scheepers, 1995; Scheepers & Nortje, 2000). The intrusion of post-orogenic to anorogenic type A granites occurred approximately 520-500 Ma ago, representing the third phase of magmatism (Scheepers & Nortje, 2000). They are intrusive in the Tygerberg and Swartland terranes (Scheepers & Nortje, 2000). The final phase of magmatism is often neglected... middle of article ...... irregular ages of the Cape Granite Suite: implications for the magmatic evolution of the Saldania Belt. ", South African Journal of Geology, vol. 105, no. 3, pp. 241-256. Scheepers, R. & Nortjé, A. 2000, “Rhyolitic ignimbrites from the Cape Granite Suite, southwest Cape Province , South Africa", Journal of African Earth Sciences, vol. 3, pp. 647-656. Scheepers, R. & Ozendaal, A. 1995, "Phosphorus as an indicator of typological potential and mineralization: the continuation Cape Granite from the Saldania Belt as a Case Study", Journal of African Earth Sciences, vol. 21, no. 1, pp. 127-140. Villaros, A., Stevens, G., Middle, J. & Buick, IS 2009, "The trace element compositions of S-type granites: evidence for disequilibrium melting and accessory phase entrainment in the source", Contributions to Mineralogy and Petrology, vol 158, no 4, pp.. 543-561.