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U–Pb single zircon crystallization ages were determined using TIMS and sensitive high resolution ion microprobe (SHRIMP) on samples of granitoid rocks exposed in the Serrinha nucleus granite–greenstone terrane, in NE Brazil. Our data show that the granitoid plutons can be divided into three distinct groups. Group 1 consists of Mesoarchaean (3.2–2.9Ga) gneisses and N-S elongated TTG (Tonalite-Trondhjemite-Granodiorite)...
The Caledonian orogenic belt in East Greenland encompasses rock complexes with a long-lived evolution of structural and metamorphic events. Due to the strong Caledonian overprint in the region it has hitherto proved difficult to unravel the earlier history. New U-Pb zircon analyses have revealed that the crystalline basement complexes can be divided into Archaean and Palaeoproterozoic terrains. The...
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