Produção Nacional
Expansão do magmatismo granítico pós-orogênico no núcleo Serrinha (NE Bahia), cráton do são francisco: idade U-Pb do Maciço Granítico Pedra Vermelha
2005; Sociedade Brasileira de Geologia; Volume: 35; Issue: 3 Linguagem: Inglês
10.5327/rbg.v35i3.1183
ISSN2317-4889
AutoresDébora Correia Rios, Herbet Conceição, Donald W. Davis, Maria de Lourdes da Silva Rosa, Moacyr Moura Marinho,
Tópico(s)Geological and Geochemical Analysis
ResumoThe Pedra Vermelha Granitic Massif, located at the North area of Serrinha Nucleus, presents a circular shape, being intrusive at the Archaean gneissic-migmatitic basement rocks and the Palaeoproterozoic volcano sedimentary sequences. The singlezircon U-Pb dating yield a crystallization age of 2080 ± 8 Ma. The geological, petrographical and litogeochemical characteristics of the studied rocks are similar to those of the Morro do Lopes granitic magmatism (2076 ± 6 a 2071 ± 6 Ma), which is located at the South area of this nucleus. These allow us to infer that those post-orogenic alkaline bodies are widespread throughout the Serrinha Nucleus and constitute its last Palaeoproterozoic magmatic expression.
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