Data/hora: 05/06/2024 16:11:45

Provedor de dados: | 42
País: | Brazil
Título: | Paleoenvironmental Evolution of Continental Carbonates in West-Central Brazil
Autores: | OLIVEIRA,EMILIANO C.; ROSSETTI,DILCE F.; UTIDA,GISELLE.
Data: | 2017-05-01
Ano: | 2017
Palavras-chave: | Central Brazil; Continental carbonates; Holocene; Paleoenvironments; Pantanal Basin; Pleistocene.
Resumo: | ABSTRACT This paper presents a sedimentological and stratigraphical study of Quaternary (Middle to Late Pleistocene/Holocene) continental carbonates outcrops inside Pantanal Basin and its surroundings, especially in Serra da Bodoquena, Pantanal do Miranda and Corumbá/Ladário plateau, in the state of Mato Grosso do Sul, as well as in Serra das Araras, in the state of Mato Grosso. The aim is to understand the depositional paleoenvironments and analyse climate and tectonic influences in their genesis and evolution. The results show that the deposition of these continental carbonates started in the Middle to Late Pleistocene and have continued, with some interruptions, until the present days. Sedimentary successions were identified in the different areas, without complete correlation. Two sedimentary successions separated by an erosional surface were described in Serra da Bodoquena and Serra das Araras. In Corumbá and Pantanal do Miranda, only one succession was described. These successions were deposited in elongated lakes parallel to fault planes; small lakes, related plains and plateaus; springs related to cliffs produced by faulting; rivers conditioned by topographic variation. The climatic interpretation, without proper temporal resolution, obtained by the stable-isotope composition and stratigraphic interpretation, indicates alternation of dry and wet periods. The Neoproterozoic faults with their neotectonics and the subsidence of the Pantanal Basin, are the major control for carbonated water flow and development of depositional areas, gradually turning plateaus into slight tilted areas, allowing the evolution of depositional systems from lakes to rivers.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000200407
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201720160584
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.89 n.1 suppl.0 2017
Fonte: | info:eu-repo/semantics/openAccess