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Abstract The Madibe greenstone belt is the easternmost belt of the northern Kraaipan terrane, located in the Kimberley Block of the Kaapvaal Craton. It comprises a mature Middle to Late Archaean volcanic island arc succession that was welded onto the evolving western margin of the Kaapvaal Shield.

The lithologies strike in a north-south direction and represent an assemblage of metamorphosed and strongly deformed volcanic and minor sedimentary rocks, now represented by phyllites, quartz-sericite schists, quartz-chlorite schists, amphibolites, talc-carbonate schists and banded iron formations. We report a SHRIMP U-Pb age of 3082.5 ± 5.9 Ma for an intermediate metavolcanic rock. Ages of zircon grains within a volcano-sedimentary rock define ages around 3.43, ~3.18 and, ~3.09 Ga and are as young as ~3.04 Ga, suggesting the presence of older, mature continental crust.

With the exception of sample MD07/01B, all the samples present CIA values higher than 55. The weathering trend can also be graphically illustrated by a molecular. Sega Saturn Mpeg Rom File. (CaO+Na2O)-Al2O3-K2O diagram (Figure 3A) after. Nesbitt and Young (1984). For comparison, average compositions of the volcanic rocks from the Superior. Ds1307 Bascom Program.