Geochronological constraints of high-grade metasedimentary rocks of the Italva and Costeiro basins: Reconstructing the Outer Magmatic Arc System of the ribeira belt, SE Brazil
Precambrian Research(2022)
Abstract
•New U-Pb data from metasedimentary rocks of the OMAS-basins, Ribeira belt, SE-Brazil.•The long-term E-verging subduction revealed two evolutionary arc-basin stages.•The Italva basin rocks display a single provenance source from the Tonian SP arc.•The Costeiro back-arc basin rocks yielded Archean to Neoproterozoic sources from SP-RN arcs and ancient blocks.•The closure of the Costeiro arc-basin culminated in the West Gondwana amalgamation.
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Key words
Neoproterozoic arc-system,Fore-arc and back-arc metasedimentary sequences,Tonian arc-basin,Ediacaran-Cryogenian arc-basin,Syn-collisional orogenic,Central Ribeira Orogen
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