Abstract
In eastern Brazil, Archean and Proterozoic basement suffered remobilization during the “Brasiliano-event” in Lower Paleozoic time. Dextral strike-slip movement at the ductile shear zones of Paraiba do Sul, Rio Negro, Guacui and others separated lozenge-shaped crustal segments up to 100 kilometers in width. The deformation of these segments obviously had been controlled by the shear zones. Contemporaneous large-scale folds with initial wavelengths of about 40 kilometers developed in a charnockitic layer about 10 kilometers thick which had been sheared off from its base. Stretching lineation parallel to the fold axes is typical throughout the whole region. Additionally, a conjugate set of small-scale shear zones enhances this stretching effect.
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© 1992 Springer Science+Business Media Dordrecht
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Lammerer, B. (1992). Deep-Crustal Response to Transpressional Shear in Brazil. In: Mason, R. (eds) Basement Tectonics 7. Proceedings of the International Conferences on Basement Tectonics, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0833-3_37
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DOI: https://doi.org/10.1007/978-94-017-0833-3_37
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-4117-3
Online ISBN: 978-94-017-0833-3
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