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Zircon age data for felsic metavolcanic rocks of the Sandspruit and Theespruit formations, the two oldest supracrustal components in the Palaeoarchaean Barberton Greenstone Belt, show that these two successions are time-equivalent and constitute one single volcanic event at ca. 3530Ma. The Sandspruit felsic rocks are ubiquitously metasomatized, intensely deformed and intruded by, and tectonically...
SHRIMP U–Pb analysis of zircon grains from an ultrahigh temperature Mg–Al granulite from the northern margin of the Kaapvaal Craton (Southern Marginal Zone) shows ages of ∼2.72Ga for the peak metamorphism. Geochemical characteristics of syn-tectonic charnockites in the area are similar to magnesian charnockites, typically formed in subduction settings. In contrast to the prevailing models on peak...
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