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| Almeida,Renato P.; Santos,Maurício G. M.; Fragoso-Cesar,Antonio R.S.; Janikian,Liliane; Fambrini,Gelson L.. |
| In Eastern South America, a series of fault-bounded sedimentary basins that crop out from Southern Uruguay to Southeastern Brazil were formed after the main collisional deformation of the Brasiliano Orogeny and record the tectonic events that affected the region from the Middle Ediacaran onwards. We address the problem of discerning the basin-forming tectonics from the later deformational events through paleostress analysis of more than 600 fault-slip data, mainly from the Camaquã Basin (Southern Brazil), sorted by stratigraphic level and cross-cutting relationships of superposed striations, and integrated with available stratigraphic and geochronological data. Our results show that the Camaquã Basin was formed by at least two distinct extensional events,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Camaquã Basin; Earth Sciences; Neoproterozoic; Paleostress Analysis; Rift Basin; Southern Brazil. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200009 |
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| Marconato,André; Almeida,Renato P.; Santos,Maurício G. M.; Nóbrega,Jorge E.S.; Souza,Rogério B.. |
| This work presents a study of selected outcrops from the Pedra das Torrinhas Formation of the Guaritas Group (Cambrian, Camaquã Basin), near the basin bordering Encantadas Fault Zone. The studied succession includes alluvial fan deposits that pass laterally into eolian deposits. Sedimentary facies and architectural element analysis were performed, followed by sedimentary petrography and microscopic porosity analysis, aiming to characterize the porosity of the deposits and its spatial distribution. The main objective was to contribute to a better understanding of the porosity spatial distribution in depositional systems characterized by the interaction between alluvial and eolian processes, with special reference to deposits formed prior to the development... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alluvial-eolian interaction; Pedra das Torrinhas Formation; Cambrian; Reservoir analogue models; Marginal rift facies. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000400018 |
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