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In the São Francisco Craton, in Bahia state, Brazil, four Archaean crustal segments collided during the Palaeoproterozoic to form the important Itabuna-Salvador-Curaçá Orogen (ISCO). Granulites were formed in the central, deepest part of the ISCO while rocks in amphibolite to greenschist facies were formed at the borders. During the uplift of the orogen shear zones, faults and fractures provided channels...
The Teofilandia area, south of the Serrinha block (Sao Francisco Craton, NE Brazil), marks a region where the boundary between the Serrinha block and the Itabuna-Salvador-Curaca belt rotates from NS to EW. The granitoids of Teofilandia are made of granodiorites and trondjhemites dated at 2.13Ga. To the south and west, they are hosted by biotite-bearing ''basement'' orthogneiss. An oriented sampling...
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