Produção Nacional
Constraining the age of Neoproterozoic glaciation in eastern Brazil: first U-Pb (shrimp) data of detrital zircons
2000; Sociedade Brasileira de Geologia; Volume: 30; Issue: 1 Linguagem: Inglês
10.5327/rbg.v30i1.759
ISSN2317-4889
AutoresAntônio Carlos Pedrosa Soares, Umberto G. Cordani, Allen P. Nutman,
Tópico(s)Paleontology and Stratigraphy of Fossils
ResumoDetrital zircons extracted from a diamictite-bearing formation of the Macaubas Group, located within the Aracuai Belt (Eastern Brazil), were dated using a Sensitive High-Resolution Ion Microprobe (SHRIMP). The youngest reliable measurement sets the upper limit for the age of the glaciation at 950 Ma. The main group of zircons (1000-950 Ma) is a good evidence of a magmatic episode, interpreted as related to the rift stage of the Aracuai-West-Congo basin system.
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