Late Ediacaran lateral-escape tectonics as recorded by the Patos shear zone (Borborema Province, NE Brazil)

Lateral escape tectonics mediated by strike-slip fault zones are an efficient mechanism of rock deformation in the continental crust collision zones. The Borborema shear zone system, which shows dimensions comparable to Cenozoic extrusion Indochina, defines a lateral setting Brasilano orogeny Northeastern Brazil. In this paper, timing high-grade metamorphism and compositions terranes involved were investigated. Patos corridor deforms Siderian Neoarchean rocks Granjeiro Complex that, turn, form basement Seridó-Lavras da Mangabeira metapelites. U-Pb zircon ages Sm-Nd whole-rock isotopic indicate that 2.80 – 2.35 Ga sequences mainly include juvenile material, whereas zircons from synkinematic migmatites partial melting occurred Late Ediacaran (ca. 565 Ma). Cooling rates provided 40Ar/39Ar range 12 17°C/Ma, indicating differential exhumation, agreement with transpressive setting. presence allochthonous dismembered along suggests Seridó-Granjeiro major tectonic boundary connected collisional front defined convergence São Francisco-Congo Amazonian cratons.